SNC5B8
Two Channel Direct Drive Speech Controller
3 Block Diagram
ROM
Program/Speech
512K×10 bits
Address Pointers/ STACK
Timing
OSC
Generator
SRAM (128 nibbles)
PWM
D/A
IO6
Sampling Rate Counter × 2
Voice
Timer
ALU
Synthesizer
IO1
IO4
IO2
IO3
IO5
4 PIN ASSIGNMENT
Symbol
P13 ~ P10
P23 ~ P20
P33 ~ P30
P43 ~ P40
P53 ~ P50
P63 ~ P60
VDD
I/O Function Description
Bit3 ~ Bit0 of Input port 1
I/O Bit3 ~ Bit0 of I/O port 2
I/O Bit3 ~ Bit0 of I/O port 3
I
O
O
Bit3 ~ Bit0 of Output port 4
Bit3 ~ Bit0 of Output port 5
I/O Bit3 ~ Bit0 of I/O port 6
P
P
I
O
O
O
Positive power supply
Negative power supply
Reset pin (active high)
Oscillator / Crystal Out
Positive Output of PWM or DA output
Negative Output of PWM
GND
RST
OSC
BUO1/VO
BUO2
2
Ver: 1.2
November 26, 2002
SONIX [ SONIX TECHNOLOGY COMPANY ]
