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6581.yaml
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/
6581.yaml
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---
description: "Sound Interface Device (SID)"
aliases: [SID]
package: DIP
pincount: 28
family: "MOS Technology"
datasheet: "http://www.waitingforfriday.com/index.php/Commodore_SID_6581_Datasheet"
pins:
- num: 1
sym: CAP1A
desc: capacitor C1 connection
- num: 2
sym: CAP1B
desc: capacitor C1 connection
- num: 3
sym: CAP2A
desc: capacitor C2 connection
- num: 4
sym: CAP2B
desc: capacitor C2 connection
- num: 5
sym: ~RES
desc: master reset
- num: 6
sym: "∅2"
desc: master clock
- num: 7
sym: R/~W
desc: read/write select
- num: 8
sym: ~CS
desc: chip select (active low)
- num: 9
sym: A0
desc: address bus (register select)
- num: 10
sym: A1
desc: address bus (register select)
- num: 11
sym: A2
desc: address bus (register select)
- num: 12
sym: A3
desc: address bus (register select)
- num: 13
sym: A4
desc: address bus (register select)
- num: 14
sym: GND
desc: ground
- num: 15
sym: D0
desc: data bus
- num: 16
sym: D1
desc: data bus
- num: 17
sym: D2
desc: data bus
- num: 18
sym: D3
desc: data bus
- num: 19
sym: D4
desc: data bus
- num: 20
sym: D5
desc: data bus
- num: 21
sym: D6
desc: data bus
- num: 22
sym: D7
desc: data bus
- num: 23
sym: POTY
desc: Y-axis potentiometer input
- num: 24
sym: POTX
desc: X-axis potentiometer input
- num: 25
sym: Vcc
desc: "+5VDC supply"
- num: 26
sym: EXT IN
desc: external audio input
- num: 27
sym: AUDIO OUT
desc: audio output
- num: 28
sym: Vdd
desc: "+12VDC supply"
specs:
- param: "Minimum clock cycle time"
val: 1
unit: "µs"
notes:
- C1 and C2 are integrating capacitors for the filter; polystyrene capacitors are preferred.
- C1 and C2 should have the same value. 2200 pF gives good operation over the audio range (30Hz-12kHz).
- "Filter cutoff frequency is approx. 2.6×10<sup>-5</sup>/C (where C is the value of C1 or C2)."
- "POTX and POTY pins must be connected to RC networks; the time constant RC should be 4.7×10<sup>-4</sup>. Recommended capacitor value is 1000 pF, recommended potentiometer value is 470 kΩ."
- "Maximum audio output level is approx. 3V p-p at a 6V DC level. A 1kΩ resistor should be connected from AUDIO OUT to ground, and a 1-10µF electrolytic capacitor should be used for AC coupling."
- "Registers:
<table>
<tr><td>$00</td><td>Voice 1 frequency low byte</td></tr>
<tr><td>$01</td><td>Voice 1 frequency high byte</td></tr>
<tr><td>$02</td><td>Voice 1 pulse width low byte</td></tr>
<tr><td>$03</td><td>Voice 1 pulse width high byte (bits 3-0)</td></tr>
<tr><td>$04</td><td>Voice 1 control (gate, sync, ring mod, waveform)</td></tr>
<tr><td>$05</td><td>Voice 1 attack/decay rates</td></tr>
<tr><td>$06</td><td>Voice 1 sustain level/release rate</td></tr>
<tr><td>$07</td><td>Voice 2 frequency low byte</td></tr>
<tr><td>$08</td><td>Voice 2 frequency high byte</td></tr>
<tr><td>$09</td><td>Voice 2 pulse width low byte</td></tr>
<tr><td>$0A</td><td>Voice 2 pulse width high byte (bits 3-0)</td></tr>
<tr><td>$0B</td><td>Voice 2 control (gate, sync, ring mod, waveform)</td></tr>
<tr><td>$0C</td><td>Voice 2 attack/decay rates</td></tr>
<tr><td>$0D</td><td>Voice 2 sustain level/release rate</td></tr>
<tr><td>$0E</td><td>Voice 3 frequency low byte</td></tr>
<tr><td>$0F</td><td>Voice 3 frequency high byte</td></tr>
<tr><td>$10</td><td>Voice 3 pulse width low byte</td></tr>
<tr><td>$11</td><td>Voice 3 pulse width high byte (bits 3-0)</td></tr>
<tr><td>$12</td><td>Voice 3 control (gate, sync, ring mod, waveform)</td></tr>
<tr><td>$13</td><td>Voice 3 attack/decay rates</td></tr>
<tr><td>$14</td><td>Voice 3 sustain level/release rate</td></tr>
<tr><td>$15</td><td>Filter cutoff frequency low byte</td></tr>
<tr><td>$16</td><td>Filter cutoff frequency high byte (bits 2-0)</td></tr>
<tr><td>$17</td><td>Filter resonance/control</td></tr>
<tr><td>$18</td><td>Filter mode/volume control</td></tr>
<tr><td>$19</td><td>POTX value (0-255), updated every 512 clock cycles</td></tr>
<tr><td>$1A</td><td>POTY value (0-255), updated every 512 clock cycles</td></tr>
<tr><td>$1B</td><td>Upper 8 bits of Oscillator 3 value (random number if noise waveform is selected)</td></tr>
<tr><td>$1C</td><td>Upper 8 bits of Voice 3 envelope generator value</td></tr>
</table>"
- "Oscillator frequency = (Fn × Fclk/16777216) Hz"
- "Pulse width = (PWn/40.95) %"
...