6581 SID

Sound Interface Device

MOS 6581
MOS 6582
MOS 8580
PCB ASSY NO. usage:
326298, KU-14194HB, 250407, 250425, 250466

Pinout

         +-----\/-----+
Cap 1a --|01        28|-- Vdd
Cap 1b --|02        27|-- AUDIO OUT
Cap 2a --|03        26|-- EXT IN
Cap 2b --|04        25|-- Vcc
 RES_l ->|05        24|-- POT X
    Φ2 ->|06        23|-- POT Y
 R/W_l ->|07        22|<> D7
  CS_l ->|08        21|<> D6
    A0 ->|09        20|<> D5
    A1 ->|10        19|<> D4
    A2 ->|11        18|<> D3
    A3 ->|12        17|<> D2
    A4 ->|13        16|<> D1
   GND --|14        15|<> D0
         +------------+

Signal Description

Pin(s)

Signal

Direction

Description

1-2

CAP 1A, 1B

N/A

Capacitor filter connections.

3-4

CAP 2A, 2B

N/A

Capacitor filter connections.

5

RES_l

in

Reset input: A low pulse initializes SID.

6

Φ2

in

CPU Φ2 clock in.

7

R/W_l

in

CPU read/write input.

8

CS_l

in

Chip Select input.

9-13

A0-A4

in

CPU Address lines.

14

Vss

N/A

Vss, 0V (GND).

15-22

D0-D7

in/out

Data bus.
23
24
POT X
POT Y
N/A
N/A

These pins are inputs to the A/D converters used to digitize the position of potentiometers. The conversion process is based on the time constant of a capacitor tied from the POT pin to ground, charged by a potentiometer tied from the POT pin to +5V DC.

25

Vcc

N/A

+5V DC.

26

EXT IN

N/A

This analog input allows external audio signals to be mixed with the audio output of SID or processed through the Filter.

27

AUDIO OUT

N/A

Audio Output of SID. As the output of SID rides at a 6V DC level, it should be AC-coupled to any audio amplifier with an electrolytic capacitor in the 1-10 µF range.

28

Vdd

N/A

Vdd, reference voltage. Connected to +12V DC (6581), +9V DC (6582, 8580).