Casio SK 8A - 7. PERCUSSION GENERATOR (MSM6294-02)

7. PERCUSSION GENERATOR (MSM6294-02)
Containing a internal ROM (128 Kbit) for percussion data, and internal 8 bit DAC (Digital to
Analog Converter), the LSI provides percussion sounds.
Percussion
Out
Pin Function of Percussion Generator
Pin No.
Signal
In/Out
Function
1
RESET
In
Reset signal input. LOW active.
The terminal holds LOW level at power switch on for initializing the internal
circuit
2 CLK
In
Clock pulse (256 kHz) input
3
No function
4 WR In
Write signal input. LOW active.
The LSI reads the percussion data from the CPU when the terminal is
LOW level.
5
cs
In
Chip select signal input.Fixed at LOW level.
6 ~ 13 D0~ D7
In
Data bus (DO — D7)
14
DVSS
Ground (OV) source for internal digital circuit
15, 16 No function
17
AVSS
Ground (OV) source for internal DAC
18 MIX-0
Out
Analog percussion signal output
19 AVDD
+5V source for internal DAC
20-27 No function
28 DVDD +5V source for internal digital circuit