peripherals.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 3 3
Title "SMART Response XE - Peripherals"
Date "2021-09-09"
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
NoConn ~ 3750 3650
$Comp
L Interface_UART:MAX3226 U?
U 1 1 6143FEFD
P 2950 2850
AR Path="/6143FEFD" Ref="U?"  Part="1" 
AR Path="/61400672/6143FEFD" Ref="U6"  Part="1" 
F 0 "U6" H 3150 4050 50  0000 C CNN
F 1 "MAX3226*" H 3250 3950 50  0000 C CNN
F 2 "Package_SO:SSOP-16_5.3x6.2mm_P0.65mm" H 2950 1550 50  0001 C CNN
F 3 "https://datasheets.maximintegrated.com/en/ds/MAX3224-MAX3245.pdf" H 2950 2950 50  0001 C CNN
	1    2950 2850
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 6143FF03
P 1900 2100
AR Path="/6143FF03" Ref="C?"  Part="1" 
AR Path="/61400672/6143FF03" Ref="C33"  Part="1" 
F 0 "C33" H 2015 2146 50  0000 L CNN
F 1 "C*" H 2015 2055 50  0000 L CNN
F 2 "" H 1938 1950 50  0001 C CNN
F 3 "~" H 1900 2100 50  0001 C CNN
	1    1900 2100
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 6143FF09
P 3900 2450
AR Path="/6143FF09" Ref="C?"  Part="1" 
AR Path="/61400672/6143FF09" Ref="C41"  Part="1" 
F 0 "C41" V 4015 2496 50  0000 L CNN
F 1 "C*" V 3800 2500 50  0000 L CNN
F 2 "" H 3938 2300 50  0001 C CNN
F 3 "~" H 3900 2450 50  0001 C CNN
	1    3900 2450
	0    1    1    0   
$EndComp
$Comp
L Device:C C?
U 1 1 6143FF0F
P 3900 2100
AR Path="/6143FF0F" Ref="C?"  Part="1" 
AR Path="/61400672/6143FF0F" Ref="C42"  Part="1" 
F 0 "C42" H 4015 2146 50  0000 L CNN
F 1 "C*" H 4015 2055 50  0000 L CNN
F 2 "" H 3938 1950 50  0001 C CNN
F 3 "~" H 3900 2100 50  0001 C CNN
	1    3900 2100
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 6143FF15
P 3900 2750
AR Path="/6143FF15" Ref="C?"  Part="1" 
AR Path="/61400672/6143FF15" Ref="C43"  Part="1" 
F 0 "C43" V 4015 2796 50  0000 L CNN
F 1 "C*" V 3800 2800 50  0000 L CNN
F 2 "" H 3938 2600 50  0001 C CNN
F 3 "~" H 3900 2750 50  0001 C CNN
	1    3900 2750
	0    1    1    0   
$EndComp
Wire Wire Line
	1900 1950 2150 1950
Wire Wire Line
	1900 2250 2150 2250
Wire Wire Line
	3750 1950 3900 1950
Wire Wire Line
	3750 2250 3900 2250
Wire Wire Line
	4050 2750 4150 2750
Wire Wire Line
	4150 2750 4150 2600
Wire Wire Line
	4150 2450 4050 2450
Wire Wire Line
	4150 2600 4200 2600
Connection ~ 4150 2600
Wire Wire Line
	4150 2600 4150 2450
$Comp
L power:GND #PWR?
U 1 1 6143FF25
P 4200 2600
AR Path="/6143FF25" Ref="#PWR?"  Part="1" 
AR Path="/61400672/6143FF25" Ref="#PWR0108"  Part="1" 
F 0 "#PWR0108" H 4200 2350 50  0001 C CNN
F 1 "GND" V 4100 2500 50  0001 C CNN
F 2 "" H 4200 2600 50  0001 C CNN
F 3 "" H 4200 2600 50  0001 C CNN
	1    4200 2600
	0    -1   -1   0   
$EndComp
Wire Wire Line
	1650 2950 2150 2950
Wire Wire Line
	2150 3650 2050 3650
Wire Wire Line
	2050 3650 2050 3550
Wire Wire Line
	2050 3550 2150 3550
$Comp
L Device:C C?
U 1 1 6143FF32
P 1700 1800
AR Path="/6143FF32" Ref="C?"  Part="1" 
AR Path="/61400672/6143FF32" Ref="C30"  Part="1" 
F 0 "C30" H 1815 1846 50  0000 L CNN
F 1 "C" H 1815 1755 50  0000 L CNN
F 2 "" H 1738 1650 50  0001 C CNN
F 3 "~" H 1700 1800 50  0001 C CNN
	1    1700 1800
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6143FF38
P 1700 1950
AR Path="/6143FF38" Ref="#PWR?"  Part="1" 
AR Path="/61400672/6143FF38" Ref="#PWR0109"  Part="1" 
F 0 "#PWR0109" H 1700 1700 50  0001 C CNN
F 1 "GND" H 1550 1900 50  0001 C CNN
F 2 "" H 1700 1950 50  0001 C CNN
F 3 "" H 1700 1950 50  0001 C CNN
	1    1700 1950
	1    0    0    -1  
$EndComp
Wire Wire Line
	1700 1650 2950 1650
$Comp
L power:+3.3V #PWR?
U 1 1 6143FF3F
P 2950 1650
AR Path="/6143FF3F" Ref="#PWR?"  Part="1" 
AR Path="/61400672/6143FF3F" Ref="#PWR0111"  Part="1" 
F 0 "#PWR0111" H 2950 1500 50  0001 C CNN
F 1 "+3.3V" H 2965 1823 50  0000 C CNN
F 2 "" H 2950 1650 50  0001 C CNN
F 3 "" H 2950 1650 50  0001 C CNN
	1    2950 1650
	1    0    0    -1  
$EndComp
Connection ~ 2950 1650
$Comp
L power:+3.3V #PWR?
U 1 1 6143FF4E
P 1600 3600
AR Path="/6143FF4E" Ref="#PWR?"  Part="1" 
AR Path="/61400672/6143FF4E" Ref="#PWR0112"  Part="1" 
F 0 "#PWR0112" H 1600 3450 50  0001 C CNN
F 1 "+3.3V" H 1615 3773 50  0000 C CNN
F 2 "" H 1600 3600 50  0001 C CNN
F 3 "" H 1600 3600 50  0001 C CNN
	1    1600 3600
	1    0    0    -1  
$EndComp
$Comp
L Connector_Generic:Conn_02x03_Odd_Even J?
U 1 1 614890B5
P 4750 3450
AR Path="/614890B5" Ref="J?"  Part="1" 
AR Path="/61400672/614890B5" Ref="J3"  Part="1" 
F 0 "J3" H 4800 3767 50  0000 C CNN
F 1 "RS232" H 4800 3676 50  0000 C CNN
F 2 "" H 4750 3450 50  0001 C CNN
F 3 "~" H 4750 3450 50  0001 C CNN
	1    4750 3450
	-1   0    0    -1  
$EndComp
$Comp
L Device:R_Small R?
U 1 1 614890BB
P 4200 3700
AR Path="/614890BB" Ref="R?"  Part="1" 
AR Path="/61400672/614890BB" Ref="R36"  Part="1" 
F 0 "R36" H 4000 3750 50  0000 L CNN
F 1 "R*" H 4000 3650 50  0000 L CNN
F 2 "" H 4200 3700 50  0001 C CNN
F 3 "~" H 4200 3700 50  0001 C CNN
	1    4200 3700
	-1   0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 614890C3
P 4200 3800
AR Path="/614890C3" Ref="#PWR?"  Part="1" 
AR Path="/61400672/614890C3" Ref="#PWR0113"  Part="1" 
F 0 "#PWR0113" H 4200 3550 50  0001 C CNN
F 1 "GND" H 4050 3750 50  0001 C CNN
F 2 "" H 4200 3800 50  0001 C CNN
F 3 "" H 4200 3800 50  0001 C CNN
	1    4200 3800
	-1   0    0    -1  
$EndComp
$Comp
L Device:R_Small R?
U 1 1 614890CC
P 4700 2700
AR Path="/614890CC" Ref="R?"  Part="1" 
AR Path="/61400672/614890CC" Ref="R35"  Part="1" 
F 0 "R35" H 4750 2750 50  0000 L CNN
F 1 "R*" H 4750 2650 50  0000 L CNN
F 2 "" H 4700 2700 50  0001 C CNN
F 3 "~" H 4700 2700 50  0001 C CNN
	1    4700 2700
	-1   0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR?
U 1 1 614890D2
P 4700 2600
AR Path="/614890D2" Ref="#PWR?"  Part="1" 
AR Path="/61400672/614890D2" Ref="#PWR0114"  Part="1" 
F 0 "#PWR0114" H 4700 2450 50  0001 C CNN
F 1 "+3.3V" H 4715 2773 50  0000 C CNN
F 2 "" H 4700 2600 50  0001 C CNN
F 3 "" H 4700 2600 50  0001 C CNN
	1    4700 2600
	-1   0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 614890DC
P 4700 3750
AR Path="/614890DC" Ref="#PWR?"  Part="1" 
AR Path="/61400672/614890DC" Ref="#PWR0115"  Part="1" 
F 0 "#PWR0115" H 4700 3500 50  0001 C CNN
F 1 "GND" H 4550 3700 50  0001 C CNN
F 2 "" H 4700 3750 50  0001 C CNN
F 3 "" H 4700 3750 50  0001 C CNN
	1    4700 3750
	-1   0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 614ADCFA
P 2950 4050
AR Path="/614ADCFA" Ref="#PWR?"  Part="1" 
AR Path="/61400672/614ADCFA" Ref="#PWR0116"  Part="1" 
F 0 "#PWR0116" H 2950 3800 50  0001 C CNN
F 1 "GND" H 2800 4000 50  0001 C CNN
F 2 "" H 2950 4050 50  0001 C CNN
F 3 "" H 2950 4050 50  0001 C CNN
	1    2950 4050
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R?
U 1 1 6143FF48
P 1850 3650
AR Path="/6143FF48" Ref="R?"  Part="1" 
AR Path="/61400672/6143FF48" Ref="R37"  Part="1" 
F 0 "R37" V 1950 3600 50  0000 L CNN
F 1 "R*" V 1750 3650 50  0000 L CNN
F 2 "" H 1850 3650 50  0001 C CNN
F 3 "~" H 1850 3650 50  0001 C CNN
	1    1850 3650
	0    1    1    0   
$EndComp
$Comp
L Memory_EEPROM:25LCxxx U?
U 1 1 61690494
P 2800 6450
AR Path="/61690494" Ref="U?"  Part="1" 
AR Path="/61400672/61690494" Ref="U2"  Part="1" 
F 0 "U2" H 2950 6850 50  0000 C CNN
F 1 "25LCxxx" H 3050 6750 50  0000 C CNN
F 2 "" H 2800 6450 50  0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/21832H.pdf" H 2800 6450 50  0001 C CNN
	1    2800 6450
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R?
U 1 1 6169049A
P 2200 6200
AR Path="/6169049A" Ref="R?"  Part="1" 
AR Path="/61400672/6169049A" Ref="R17"  Part="1" 
F 0 "R17" H 2000 6250 50  0000 L CNN
F 1 "10k" H 2000 6150 50  0000 L CNN
F 2 "" H 2200 6200 50  0001 C CNN
F 3 "~" H 2200 6200 50  0001 C CNN
	1    2200 6200
	-1   0    0    -1  
$EndComp
Wire Wire Line
	2200 6300 2200 6350
Wire Wire Line
	2200 6350 2400 6350
Wire Wire Line
	2200 6100 2200 6050
Wire Wire Line
	2200 6050 2800 6050
Wire Wire Line
	2800 6050 2800 6150
Wire Wire Line
	2800 6050 2800 6000
Connection ~ 2800 6050
$Comp
L power:+3.3V #PWR?
U 1 1 616904A7
P 2800 6000
AR Path="/616904A7" Ref="#PWR?"  Part="1" 
AR Path="/61400672/616904A7" Ref="#PWR0105"  Part="1" 
F 0 "#PWR0105" H 2800 5850 50  0001 C CNN
F 1 "+3.3V" H 2815 6173 50  0000 C CNN
F 2 "" H 2800 6000 50  0001 C CNN
F 3 "" H 2800 6000 50  0001 C CNN
	1    2800 6000
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 616904AD
P 2800 6750
AR Path="/616904AD" Ref="#PWR?"  Part="1" 
AR Path="/61400672/616904AD" Ref="#PWR0106"  Part="1" 
F 0 "#PWR0106" H 2800 6500 50  0001 C CNN
F 1 "GND" H 2650 6700 50  0001 C CNN
F 2 "" H 2800 6750 50  0001 C CNN
F 3 "" H 2800 6750 50  0001 C CNN
	1    2800 6750
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R?
U 1 1 616904B3
P 2100 6700
AR Path="/616904B3" Ref="R?"  Part="1" 
AR Path="/61400672/616904B3" Ref="R16"  Part="1" 
F 0 "R16" H 1900 6750 50  0000 L CNN
F 1 "10k" H 1900 6650 50  0000 L CNN
F 2 "" H 2100 6700 50  0001 C CNN
F 3 "~" H 2100 6700 50  0001 C CNN
	1    2100 6700
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 616904B9
P 2100 6800
AR Path="/616904B9" Ref="#PWR?"  Part="1" 
AR Path="/61400672/616904B9" Ref="#PWR0110"  Part="1" 
F 0 "#PWR0110" H 2100 6550 50  0001 C CNN
F 1 "GND" H 1950 6750 50  0001 C CNN
F 2 "" H 2100 6800 50  0001 C CNN
F 3 "" H 2100 6800 50  0001 C CNN
	1    2100 6800
	1    0    0    -1  
$EndComp
Wire Wire Line
	2100 6600 2100 6450
Wire Wire Line
	2100 6450 2400 6450
Wire Wire Line
	3200 6350 3400 6350
Wire Wire Line
	3200 6450 3400 6450
Wire Wire Line
	3200 6550 3400 6550
$Comp
L Device:R_Small R?
U 1 1 616904C7
P 1900 6200
AR Path="/616904C7" Ref="R?"  Part="1" 
AR Path="/61400672/616904C7" Ref="R18"  Part="1" 
F 0 "R18" H 1700 6250 50  0000 L CNN
F 1 "R*" H 1750 6150 50  0000 L CNN
F 2 "" H 1900 6200 50  0001 C CNN
F 3 "~" H 1900 6200 50  0001 C CNN
	1    1900 6200
	-1   0    0    -1  
$EndComp
Wire Wire Line
	1750 6550 1900 6550
Wire Wire Line
	1900 6550 1900 6300
Connection ~ 1900 6550
Wire Wire Line
	1900 6550 2250 6550
Wire Wire Line
	1900 6100 1900 6050
Wire Wire Line
	1900 6050 2200 6050
Connection ~ 2200 6050
Wire Wire Line
	1500 6450 2100 6450
Connection ~ 2100 6450
Wire Wire Line
	1500 6550 1550 6550
$Comp
L Device:R_Small R?
U 1 1 616B1032
P 1650 6550
AR Path="/616B1032" Ref="R?"  Part="1" 
AR Path="/61400672/616B1032" Ref="R3"  Part="1" 
F 0 "R3" V 1750 6500 50  0000 L CNN
F 1 "33" V 1850 6500 50  0000 L CNN
F 2 "" H 1650 6550 50  0001 C CNN
F 3 "~" H 1650 6550 50  0001 C CNN
	1    1650 6550
	0    1    1    0   
$EndComp
Text HLabel 1500 6450 0    50   Input ~ 0
MEM_HOLD
Text HLabel 1500 6550 0    50   Input ~ 0
MEM_CS
Text HLabel 3400 6350 2    50   Input ~ 0
SCK
Text HLabel 3400 6450 2    50   Input ~ 0
MOSI
Text HLabel 3400 6550 2    50   Input ~ 0
MISO
$Comp
L Device:Buzzer SP?
U 1 1 617AA6C3
P 9100 2100
AR Path="/617AA6C3" Ref="SP?"  Part="1" 
AR Path="/61400672/617AA6C3" Ref="SP1"  Part="1" 
F 0 "SP1" V 9200 2250 50  0000 L CNN
F 1 "Buzzer*" V 9100 2300 50  0000 L CNN
F 2 "" V 9075 2200 50  0001 C CNN
F 3 "~" V 9075 2200 50  0001 C CNN
	1    9100 2100
	0    -1   -1   0   
$EndComp
$Comp
L Device:R_Small R?
U 1 1 617AA6C9
P 9000 2550
AR Path="/617AA6C9" Ref="R?"  Part="1" 
AR Path="/61400672/617AA6C9" Ref="R39"  Part="1" 
F 0 "R39" H 8800 2600 50  0000 L CNN
F 1 "R*" H 8800 2500 50  0000 L CNN
F 2 "" H 9000 2550 50  0001 C CNN
F 3 "~" H 9000 2550 50  0001 C CNN
	1    9000 2550
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 617AA6CF
P 9000 2650
AR Path="/617AA6CF" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617AA6CF" Ref="#PWR0122"  Part="1" 
F 0 "#PWR0122" H 9000 2400 50  0001 C CNN
F 1 "GND" H 8850 2500 50  0001 C CNN
F 2 "" H 9000 2650 50  0001 C CNN
F 3 "" H 9000 2650 50  0001 C CNN
	1    9000 2650
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R?
U 1 1 617AA6D5
P 8600 1900
AR Path="/617AA6D5" Ref="R?"  Part="1" 
AR Path="/61400672/617AA6D5" Ref="R10"  Part="1" 
F 0 "R10" V 8700 1850 50  0000 L CNN
F 1 "R*" V 8800 1850 50  0000 L CNN
F 2 "" H 8600 1900 50  0001 C CNN
F 3 "~" H 8600 1900 50  0001 C CNN
	1    8600 1900
	0    1    -1   0   
$EndComp
Wire Wire Line
	8500 1900 8400 1900
$Comp
L power:GND #PWR?
U 1 1 617AA6DC
P 9700 2650
AR Path="/617AA6DC" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617AA6DC" Ref="#PWR0143"  Part="1" 
F 0 "#PWR0143" H 9700 2400 50  0001 C CNN
F 1 "GND" H 9550 2550 50  0001 C CNN
F 2 "" H 9700 2650 50  0001 C CNN
F 3 "" H 9700 2650 50  0001 C CNN
	1    9700 2650
	1    0    0    -1  
$EndComp
$Comp
L Device:D D?
U 1 1 617AA6E2
P 9700 2450
AR Path="/617AA6E2" Ref="D?"  Part="1" 
AR Path="/61400672/617AA6E2" Ref="D1"  Part="1" 
F 0 "D1" V 9654 2529 50  0000 L CNN
F 1 "D*" V 9745 2529 50  0000 L CNN
F 2 "" H 9700 2450 50  0001 C CNN
F 3 "~" H 9700 2450 50  0001 C CNN
	1    9700 2450
	0    1    1    0   
$EndComp
Wire Wire Line
	9700 2600 9700 2650
Wire Wire Line
	9700 2300 9700 2050
$Comp
L Device:C C?
U 1 1 617AA6EA
P 9350 2450
AR Path="/617AA6EA" Ref="C?"  Part="1" 
AR Path="/61400672/617AA6EA" Ref="C18"  Part="1" 
F 0 "C18" H 9465 2496 50  0000 L CNN
F 1 "C" H 9465 2405 50  0000 L CNN
F 2 "" H 9388 2300 50  0001 C CNN
F 3 "~" H 9350 2450 50  0001 C CNN
	1    9350 2450
	-1   0    0    1   
$EndComp
$Comp
L power:GND #PWR?
U 1 1 617AA6F0
P 9350 2650
AR Path="/617AA6F0" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617AA6F0" Ref="#PWR0150"  Part="1" 
F 0 "#PWR0150" H 9350 2400 50  0001 C CNN
F 1 "GND" H 9200 2500 50  0001 C CNN
F 2 "" H 9350 2650 50  0001 C CNN
F 3 "" H 9350 2650 50  0001 C CNN
	1    9350 2650
	1    0    0    -1  
$EndComp
Wire Wire Line
	9350 2650 9350 2600
Wire Wire Line
	9350 2300 9350 2200
Connection ~ 9350 2050
Wire Wire Line
	9350 2050 9700 2050
$Comp
L Device:R_Small R?
U 1 1 617AA6FA
P 9350 1750
AR Path="/617AA6FA" Ref="R?"  Part="1" 
AR Path="/61400672/617AA6FA" Ref="R9"  Part="1" 
F 0 "R9" V 9450 1700 50  0000 L CNN
F 1 "R*" V 9550 1700 50  0000 L CNN
F 2 "" H 9350 1750 50  0001 C CNN
F 3 "~" H 9350 1750 50  0001 C CNN
	1    9350 1750
	1    0    0    1   
$EndComp
$Comp
L power:+BATT #PWR?
U 1 1 617AA700
P 9350 1650
AR Path="/617AA700" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617AA700" Ref="#PWR0151"  Part="1" 
F 0 "#PWR0151" H 9350 1500 50  0001 C CNN
F 1 "+BATT" H 9365 1823 50  0000 C CNN
F 2 "" H 9350 1650 50  0001 C CNN
F 3 "" H 9350 1650 50  0001 C CNN
	1    9350 1650
	1    0    0    -1  
$EndComp
Wire Wire Line
	9350 2050 9350 1900
$Comp
L power:GND #PWR?
U 1 1 617AA70B
P 8700 2650
AR Path="/617AA70B" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617AA70B" Ref="#PWR0157"  Part="1" 
F 0 "#PWR0157" H 8700 2400 50  0001 C CNN
F 1 "GND" H 8600 2550 50  0001 C CNN
F 2 "" H 8700 2650 50  0001 C CNN
F 3 "" H 8700 2650 50  0001 C CNN
	1    8700 2650
	1    0    0    -1  
$EndComp
Wire Wire Line
	8700 2250 9000 2250
Wire Wire Line
	9000 2250 9000 2450
Wire Wire Line
	8400 2450 8400 1900
Connection ~ 8400 1900
Wire Wire Line
	8400 1900 8300 1900
Wire Wire Line
	9200 2200 9350 2200
Connection ~ 9350 2200
Wire Wire Line
	9350 2200 9350 2050
Wire Wire Line
	8700 1900 9350 1900
Wire Wire Line
	9000 2250 9000 2200
Connection ~ 9000 2250
$Comp
L Device:Q_NMOS_GSD Q?
U 1 1 617AA71C
P 8600 2450
AR Path="/617AA71C" Ref="Q?"  Part="1" 
AR Path="/61400672/617AA71C" Ref="Q1"  Part="1" 
F 0 "Q1" H 8500 2600 50  0000 L CNN
F 1 "NMOS ??" H 8300 2300 50  0000 L CNN
F 2 "" H 8800 2550 50  0001 C CNN
F 3 "~" H 8600 2450 50  0001 C CNN
	1    8600 2450
	1    0    0    -1  
$EndComp
Text HLabel 8300 1900 0    50   Input ~ 0
BUZZER
$Comp
L Connector_Generic:Conn_02x05_Counter_Clockwise U?
U 1 1 617EDA59
P 9050 4800
AR Path="/617EDA59" Ref="U?"  Part="1" 
AR Path="/61400672/617EDA59" Ref="U5"  Part="1" 
F 0 "U5" H 9100 5217 50  0000 C CNN
F 1 "Mystery comp" H 9100 5126 50  0000 C CNN
F 2 "" H 9050 4800 50  0001 C CNN
F 3 "~" H 9050 4800 50  0001 C CNN
	1    9050 4800
	1    0    0    -1  
$EndComp
Wire Wire Line
	8850 5000 8800 5000
Wire Wire Line
	9350 5000 9550 5000
$Comp
L power:GND #PWR?
U 1 1 617EDA65
P 8600 4900
AR Path="/617EDA65" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617EDA65" Ref="#PWR0152"  Part="1" 
F 0 "#PWR0152" H 8600 4650 50  0001 C CNN
F 1 "GND" V 8600 4700 50  0001 C CNN
F 2 "" H 8600 4900 50  0001 C CNN
F 3 "" H 8600 4900 50  0001 C CNN
	1    8600 4900
	0    1    1    0   
$EndComp
Wire Wire Line
	8600 4900 8850 4900
$Comp
L power:GND #PWR?
U 1 1 617EDA6C
P 9500 4800
AR Path="/617EDA6C" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617EDA6C" Ref="#PWR0153"  Part="1" 
F 0 "#PWR0153" H 9500 4550 50  0001 C CNN
F 1 "GND" V 9500 4600 50  0001 C CNN
F 2 "" H 9500 4800 50  0001 C CNN
F 3 "" H 9500 4800 50  0001 C CNN
	1    9500 4800
	0    -1   -1   0   
$EndComp
Wire Wire Line
	9500 4800 9350 4800
$Comp
L power:+3.3V #PWR?
U 1 1 617EDA73
P 7900 4700
AR Path="/617EDA73" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617EDA73" Ref="#PWR0154"  Part="1" 
F 0 "#PWR0154" H 7900 4550 50  0001 C CNN
F 1 "+3.3V" V 7900 4950 50  0000 C CNN
F 2 "" H 7900 4700 50  0001 C CNN
F 3 "" H 7900 4700 50  0001 C CNN
	1    7900 4700
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 617EDA7A
P 8800 4600
AR Path="/617EDA7A" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617EDA7A" Ref="#PWR0155"  Part="1" 
F 0 "#PWR0155" H 8800 4350 50  0001 C CNN
F 1 "GND" V 8850 4400 50  0001 C CNN
F 2 "" H 8800 4600 50  0001 C CNN
F 3 "" H 8800 4600 50  0001 C CNN
	1    8800 4600
	0    1    1    0   
$EndComp
Wire Wire Line
	8800 4600 8850 4600
$Comp
L power:+3.3V #PWR?
U 1 1 617EDA81
P 10100 4650
AR Path="/617EDA81" Ref="#PWR?"  Part="1" 
AR Path="/61400672/617EDA81" Ref="#PWR0156"  Part="1" 
F 0 "#PWR0156" H 10100 4500 50  0001 C CNN
F 1 "+3.3V" H 10100 4800 50  0000 C CNN
F 2 "" H 10100 4650 50  0001 C CNN
F 3 "" H 10100 4650 50  0001 C CNN
	1    10100 4650
	1    0    0    -1  
$EndComp
NoConn ~ 9350 4600
NoConn ~ 8850 4700
Text HLabel 9750 5850 2    50   Input ~ 0
SDA
Text HLabel 9750 5750 2    50   Input ~ 0
SCL
Text HLabel 8600 5000 0    50   Input ~ 0
U5_INT
$Comp
L Transistor_BJT:PZT2222A Q?
U 1 1 61A6B163
P 5850 6450
AR Path="/61A6B163" Ref="Q?"  Part="1" 
AR Path="/61400672/61A6B163" Ref="Q2"  Part="1" 
F 0 "Q2" H 6041 6496 50  0000 L CNN
F 1 "PZT2222A*" H 6041 6405 50  0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-223" H 6050 6375 50  0001 L CIN
F 3 "http://www.fairchildsemi.com/ds/PN/PN2222A.pdf" H 5850 6450 50  0001 L CNN
	1    5850 6450
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R?
U 1 1 61A6B169
P 5500 6450
AR Path="/61A6B169" Ref="R?"  Part="1" 
AR Path="/61400672/61A6B169" Ref="R34"  Part="1" 
F 0 "R34" H 5300 6500 50  0000 L CNN
F 1 "R*" H 5300 6400 50  0000 L CNN
F 2 "" H 5500 6450 50  0001 C CNN
F 3 "~" H 5500 6450 50  0001 C CNN
	1    5500 6450
	0    1    1    0   
$EndComp
$Comp
L Device:R_Small R?
U 1 1 61A6B16F
P 5950 5650
AR Path="/61A6B16F" Ref="R?"  Part="1" 
AR Path="/61400672/61A6B16F" Ref="R14"  Part="1" 
F 0 "R14" V 6050 5600 50  0000 L CNN
F 1 "R*" V 6150 5600 50  0000 L CNN
F 2 "" H 5950 5650 50  0001 C CNN
F 3 "~" H 5950 5650 50  0001 C CNN
	1    5950 5650
	-1   0    0    1   
$EndComp
Wire Wire Line
	5650 6450 5600 6450
$Comp
L power:GND #PWR?
U 1 1 61A6B179
P 5950 6950
AR Path="/61A6B179" Ref="#PWR?"  Part="1" 
AR Path="/61400672/61A6B179" Ref="#PWR0135"  Part="1" 
F 0 "#PWR0135" H 5950 6700 50  0001 C CNN
F 1 "GND" H 5800 6900 50  0001 C CNN
F 2 "" H 5950 6950 50  0001 C CNN
F 3 "" H 5950 6950 50  0001 C CNN
	1    5950 6950
	1    0    0    -1  
$EndComp
$Comp
L Device:LED D?
U 1 1 61A6B180
P 5950 5900
AR Path="/61A6B180" Ref="D?"  Part="1" 
AR Path="/61400672/61A6B180" Ref="D2"  Part="1" 
F 0 "D2" H 5943 6116 50  0000 C CNN
F 1 "LED*" H 5943 6025 50  0000 C CNN
F 2 "" H 5950 5900 50  0001 C CNN
F 3 "~" H 5950 5900 50  0001 C CNN
	1    5950 5900
	0    1    -1   0   
$EndComp
Wire Wire Line
	5350 6450 5400 6450
$Comp
L power:+3.3V #PWR?
U 1 1 61A89976
P 5950 5550
AR Path="/61A89976" Ref="#PWR?"  Part="1" 
AR Path="/61400672/61A89976" Ref="#PWR0136"  Part="1" 
F 0 "#PWR0136" H 5950 5400 50  0001 C CNN
F 1 "+3.3V" H 5965 5723 50  0000 C CNN
F 2 "" H 5950 5550 50  0001 C CNN
F 3 "" H 5950 5550 50  0001 C CNN
	1    5950 5550
	1    0    0    -1  
$EndComp
Text HLabel 5350 6450 0    50   Input ~ 0
DEBUG
Wire Wire Line
	1950 3650 2050 3650
Connection ~ 2050 3650
Wire Wire Line
	1750 3650 1600 3650
Wire Wire Line
	1600 3650 1600 3600
Wire Wire Line
	1650 3200 2050 3200
Wire Wire Line
	2050 3200 2050 3350
Wire Wire Line
	2050 3350 2150 3350
Wire Wire Line
	4950 3450 5100 3450
Wire Wire Line
	5100 3450 5100 3050
Wire Wire Line
	5100 3050 4100 3050
Wire Wire Line
	4100 3050 4100 3350
Wire Wire Line
	4100 3350 3750 3350
Wire Wire Line
	3750 2950 5000 2950
Wire Wire Line
	5000 2950 5000 3350
Wire Wire Line
	5000 3350 4950 3350
Wire Wire Line
	3750 3550 4200 3550
Wire Wire Line
	4200 3550 4200 3350
Wire Wire Line
	4200 3350 4450 3350
Wire Wire Line
	4200 3600 4200 3550
Connection ~ 4200 3550
Wire Wire Line
	4700 2800 4700 2850
Wire Wire Line
	4700 2850 4400 2850
Wire Wire Line
	4400 2850 4400 3450
Wire Wire Line
	4400 3450 4450 3450
Wire Wire Line
	4450 3550 4400 3550
Wire Wire Line
	4400 3550 4400 3700
Wire Wire Line
	4400 3700 4700 3700
Wire Wire Line
	5000 3700 5000 3550
Wire Wire Line
	5000 3550 4950 3550
Wire Wire Line
	4700 3750 4700 3700
Connection ~ 4700 3700
Wire Wire Line
	4700 3700 5000 3700
Wire Wire Line
	5950 6050 5950 6250
Wire Wire Line
	9350 1900 9350 1850
Connection ~ 9350 1900
$Comp
L Connector:TestPoint TP14
U 1 1 63DD9602
P 2250 6700
F 0 "TP14" H 2192 6726 50  0001 R CNN
F 1 "CS_Flash" H 2192 6772 50  0000 R CNN
F 2 "" H 2450 6700 50  0001 C CNN
F 3 "~" H 2450 6700 50  0001 C CNN
	1    2250 6700
	-1   0    0    1   
$EndComp
Wire Wire Line
	2250 6700 2250 6550
Connection ~ 2250 6550
Wire Wire Line
	2250 6550 2400 6550
$Comp
L Device:C_Small C25
U 1 1 63DE061C
P 7900 5000
F 0 "C25" H 7992 5046 50  0000 L CNN
F 1 "C" H 7992 4955 50  0000 L CNN
F 2 "" H 7900 5000 50  0001 C CNN
F 3 "~" H 7900 5000 50  0001 C CNN
	1    7900 5000
	1    0    0    -1  
$EndComp
Wire Wire Line
	7900 4800 8850 4800
Wire Wire Line
	7900 4800 7900 4700
Wire Wire Line
	7900 4900 7900 4800
Connection ~ 7900 4800
$Comp
L power:GND #PWR0170
U 1 1 63DED4CC
P 7900 5100
F 0 "#PWR0170" H 7900 4850 50  0001 C CNN
F 1 "GND" H 7905 4927 50  0000 C CNN
F 2 "" H 7900 5100 50  0001 C CNN
F 3 "" H 7900 5100 50  0001 C CNN
	1    7900 5100
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R13
U 1 1 63DEEBC3
P 8550 5300
F 0 "R13" V 8500 5150 50  0000 C CNN
F 1 "R*" V 8500 5450 50  0000 C CNN
F 2 "" H 8550 5300 50  0001 C CNN
F 3 "~" H 8550 5300 50  0001 C CNN
	1    8550 5300
	0    1    1    0   
$EndComp
Wire Wire Line
	8650 5300 8800 5300
Wire Wire Line
	8800 5300 8800 5000
Connection ~ 8800 5000
Wire Wire Line
	8800 5000 8600 5000
$Comp
L power:+3.3V #PWR0171
U 1 1 63DF26A3
P 8250 5300
F 0 "#PWR0171" H 8250 5150 50  0001 C CNN
F 1 "+3.3V" H 8265 5473 50  0000 C CNN
F 2 "" H 8250 5300 50  0001 C CNN
F 3 "" H 8250 5300 50  0001 C CNN
	1    8250 5300
	1    0    0    -1  
$EndComp
Wire Wire Line
	8450 5300 8250 5300
$Comp
L Device:C_Small C19
U 1 1 63DF66AE
P 10100 4850
F 0 "C19" H 10192 4896 50  0000 L CNN
F 1 "C" H 10192 4805 50  0000 L CNN
F 2 "" H 10100 4850 50  0001 C CNN
F 3 "~" H 10100 4850 50  0001 C CNN
	1    10100 4850
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0172
U 1 1 63DF8EB9
P 10100 4950
F 0 "#PWR0172" H 10100 4700 50  0001 C CNN
F 1 "GND" H 10105 4777 50  0000 C CNN
F 2 "" H 10100 4950 50  0001 C CNN
F 3 "" H 10100 4950 50  0001 C CNN
	1    10100 4950
	1    0    0    -1  
$EndComp
Wire Wire Line
	9350 4700 10100 4700
Wire Wire Line
	10100 4700 10100 4750
Wire Wire Line
	10100 4700 10100 4650
Connection ~ 10100 4700
$Comp
L Connector:TestPoint TP16
U 1 1 63E03A5C
P 8900 5850
F 0 "TP16" V 9095 5922 50  0001 C CNN
F 1 "SDA" V 8900 6100 50  0000 C CNN
F 2 "" H 9100 5850 50  0001 C CNN
F 3 "~" H 9100 5850 50  0001 C CNN
	1    8900 5850
	0    -1   -1   0   
$EndComp
$Comp
L Connector:TestPoint TP15
U 1 1 63E05549
P 8900 5750
F 0 "TP15" V 9095 5822 50  0001 C CNN
F 1 "SCL" V 8900 6000 50  0000 C CNN
F 2 "" H 9100 5750 50  0001 C CNN
F 3 "~" H 9100 5750 50  0001 C CNN
	1    8900 5750
	0    -1   -1   0   
$EndComp
Wire Wire Line
	8900 5750 8950 5750
Wire Wire Line
	9550 5750 9550 5000
Wire Wire Line
	9650 4900 9650 5850
Wire Wire Line
	9650 5850 9250 5850
Wire Wire Line
	9350 4900 9650 4900
Wire Wire Line
	9550 5750 9750 5750
Connection ~ 9550 5750
Wire Wire Line
	9650 5850 9750 5850
Connection ~ 9650 5850
$Comp
L Device:R_Small R6
U 1 1 63E284DF
P 9250 5600
F 0 "R6" H 9309 5646 50  0000 L CNN
F 1 "4.7k*" H 9309 5555 50  0000 L CNN
F 2 "" H 9250 5600 50  0001 C CNN
F 3 "~" H 9250 5600 50  0001 C CNN
	1    9250 5600
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R7
U 1 1 63E29006
P 8950 5600
F 0 "R7" H 9009 5646 50  0000 L CNN
F 1 "4.7k" H 9009 5555 50  0000 L CNN
F 2 "" H 8950 5600 50  0001 C CNN
F 3 "~" H 8950 5600 50  0001 C CNN
	1    8950 5600
	1    0    0    -1  
$EndComp
Wire Wire Line
	9250 5700 9250 5850
Connection ~ 9250 5850
Wire Wire Line
	9250 5850 8900 5850
Wire Wire Line
	8950 5700 8950 5750
Connection ~ 8950 5750
Wire Wire Line
	8950 5750 9550 5750
$Comp
L power:+3.3V #PWR0173
U 1 1 63E44C8C
P 9100 5400
F 0 "#PWR0173" H 9100 5250 50  0001 C CNN
F 1 "+3.3V" H 9115 5573 50  0000 C CNN
F 2 "" H 9100 5400 50  0001 C CNN
F 3 "" H 9100 5400 50  0001 C CNN
	1    9100 5400
	1    0    0    -1  
$EndComp
Wire Wire Line
	8950 5500 8950 5450
Wire Wire Line
	8950 5450 9100 5450
Wire Wire Line
	9250 5450 9250 5500
Wire Wire Line
	9100 5450 9100 5400
Connection ~ 9100 5450
Wire Wire Line
	9100 5450 9250 5450
$Comp
L Device:C_Small C55
U 1 1 63E5AAA9
P 10550 5150
F 0 "C55" H 10642 5196 50  0000 L CNN
F 1 "C" H 10642 5105 50  0000 L CNN
F 2 "" H 10550 5150 50  0001 C CNN
F 3 "~" H 10550 5150 50  0001 C CNN
	1    10550 5150
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR0174
U 1 1 63E5B169
P 10550 5050
F 0 "#PWR0174" H 10550 4900 50  0001 C CNN
F 1 "+3.3V" H 10565 5223 50  0000 C CNN
F 2 "" H 10550 5050 50  0001 C CNN
F 3 "" H 10550 5050 50  0001 C CNN
	1    10550 5050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0175
U 1 1 63E5B719
P 10550 5250
F 0 "#PWR0175" H 10550 5000 50  0001 C CNN
F 1 "GND" H 10555 5077 50  0000 C CNN
F 2 "" H 10550 5250 50  0001 C CNN
F 3 "" H 10550 5250 50  0001 C CNN
	1    10550 5250
	1    0    0    -1  
$EndComp
$Comp
L Jumper:Jumper_2_Bridged R28
U 1 1 642D53D1
P 1450 2950
F 0 "R28" H 1450 3053 50  0000 C CNN
F 1 "Jumper_2_Bridged" H 1450 3054 50  0001 C CNN
F 2 "" H 1450 2950 50  0001 C CNN
F 3 "~" H 1450 2950 50  0001 C CNN
	1    1450 2950
	1    0    0    -1  
$EndComp
$Comp
L Jumper:Jumper_2_Bridged R21
U 1 1 642D5E0D
P 1450 3200
F 0 "R21" H 1450 3303 50  0000 C CNN
F 1 "Jumper_2_Bridged" H 1450 3304 50  0001 C CNN
F 2 "" H 1450 3200 50  0001 C CNN
F 3 "~" H 1450 3200 50  0001 C CNN
	1    1450 3200
	1    0    0    -1  
$EndComp
Wire Wire Line
	1150 2950 1250 2950
Wire Wire Line
	1250 3200 1150 3200
Text HLabel 1150 2950 0    50   Input ~ 0
TX
Text HLabel 1150 3200 0    50   Input ~ 0
RX
$Comp
L Device:C C3
U 1 1 642EE53F
P 4700 1800
F 0 "C3" H 4815 1846 50  0000 L CNN
F 1 "C" H 4815 1755 50  0000 L CNN
F 2 "" H 4738 1650 50  0001 C CNN
F 3 "~" H 4700 1800 50  0001 C CNN
	1    4700 1800
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR04
U 1 1 642EF942
P 4700 1950
F 0 "#PWR04" H 4700 1700 50  0001 C CNN
F 1 "GND" H 4705 1777 50  0000 C CNN
F 2 "" H 4700 1950 50  0001 C CNN
F 3 "" H 4700 1950 50  0001 C CNN
	1    4700 1950
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR03
U 1 1 642EFF1C
P 4700 1650
F 0 "#PWR03" H 4700 1500 50  0001 C CNN
F 1 "+3.3V" H 4715 1823 50  0000 C CNN
F 2 "" H 4700 1650 50  0001 C CNN
F 3 "" H 4700 1650 50  0001 C CNN
	1    4700 1650
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR05
U 1 1 642FD893
P 6350 6850
F 0 "#PWR05" H 6350 6700 50  0001 C CNN
F 1 "+3.3V" H 6365 7023 50  0000 C CNN
F 2 "" H 6350 6850 50  0001 C CNN
F 3 "" H 6350 6850 50  0001 C CNN
	1    6350 6850
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C15
U 1 1 642FBEA6
P 6150 6900
F 0 "C15" V 5921 6900 50  0000 C CNN
F 1 "C" V 6012 6900 50  0000 C CNN
F 2 "" H 6150 6900 50  0001 C CNN
F 3 "~" H 6150 6900 50  0001 C CNN
	1    6150 6900
	0    1    1    0   
$EndComp
Wire Wire Line
	5950 6650 5950 6900
Wire Wire Line
	5950 6900 6050 6900
Connection ~ 5950 6900
Wire Wire Line
	5950 6900 5950 6950
Wire Wire Line
	6250 6900 6350 6900
Wire Wire Line
	6350 6900 6350 6850
Text Notes 8400 6150 0    50   ~ 0
Despite missing R6, SDA is still pulled to\n+3.3V through R41 (COL1) by about 30k Ohm.
Text Notes 7950 2950 0    50   ~ 0
BEWARE : On the PCB,  drain and source of Q1 are swapped
$EndSCHEMATC