SN66120B
4-Channel Speech Controller
3 Block Diagram
ROM
Program/Speech/Melody/Instrument waveform
384K×12 bits
Address Pointers/ STACK
Timing
Generator
OSC
SRAM (128 nibbles)
Sampling Rate Counter × 4
DA8-bit
DA8-bit
Voice
ALU
Synthesizer
IO1
IO2
IO3
IO4
4 PIN ASSIGNMENT
Symbol
I/O Function Description
P13, P12, P11, P10
I
Bit3 ~ Bit0 of input port 1
P23, P22, P21, P20 I/O Bit3 ~ Bit0 of I/O port 2
P33, P32, P31, P30 I/O Bit3 ~ Bit0 of I/O port 3
P43, P42, P41, P40
O
I
Bit3 ~ Bit0 of output port 4
Positive power supply
Negative power supply
VDD
GND
I
OSC/XIN
XOUT
CKSEL
I
O
I
Oscillator / Crystal In
Crystal Out
Clock type select
‘L’ or floating → RC oscillator
‘H’ →Crystal
D/A current output, for channel 1 and 2
D/A current output, for channel 3 and 4
VO1
VO2
O
O
2
Ver: 1.1
December 6, 2004
SONIX [ SONIX TECHNOLOGY COMPANY ]
