SNC206S
Direct Drive Speech Controller
3.
Block Diagram
ROM
Program/Speech
64K×10 bits
Timing
Generator
Address Pointers/ STACK
SRAM (32 nibbles)
Timer
ALU
IO3
OSC
Sampling Rate Counter
Voice
Synthesizer
PWM
D/A
4.
PIN ASSIGNMENT
Symbol
P33 ~ P30
VDD
GND
RST
OSC
BUO1/VO
BUO2
I/O
I/O
P
P
I
O
O
O
Function Description
Bit3 ~ Bit0 of I/O port 3
Positive power supply
Negative power supply
Reset pin (active high)
Oscillator / Crystal Out
Positive Output of PWM or DA output
Negative Output of PWM
Ver: 1.2
3
Sept 20, 2007