SNC668_05 Datasheet, PDF (4/14 Pages) SONiX Technology Company – 4-Channel Speech Controller

3. Block Diagram
SNC668
4-Channel Speech Controller
ROM
Program/Speech/Melody/Instrument waveform
96K×12 bits
Address Pointers/ STACK
Timing
Generator
OSC
SRAM (256 nibbles)
Sampling Rate Counter × 4
Timer
IO1
ALU
Voice
Synthesizer
Volume
Control
PWM
IO2
IO3
IO4
IO5
IO6
8bit D/A
4. PIN ASSIGNMENT
Symbol
P13 ~ P10
P23 ~ P20
P33 ~ P30
P43 ~ P40
P53 ~ P50
P63 ~ P60
VDD
GND
XIN
RST
XOUT/OSC
CKSEL
BUO1/VO1
BUO2/VO2
I/O Function Description
I/O Bit3 ~ Bit0 of I/O port 1
I/O Bit3 ~ Bit0 of I/O port 2
I/O Bit3 ~ Bit0 of I/O port 3
I/O Bit3 ~ Bit0 of I/O port 4
I/O Bit3 ~ Bit0 of I/O port 5
I/O Bit3 ~ Bit0 of I/O port 6
P Positive power supply
P Negative power supply
I Crystal In
I Chip Reset (Active high)
O Crystal Out / Rosc In
I Clock type select (Internal pull low)
‘L’ or floating → RC oscillator
‘H’ →Crystal
O Positive Output of PWM or DA1
O Negative Output of PWM or DA2
Ver: 1.3
4
June 8, 2005