SNC698
4-Channel Speech Controller
3. Block Diagram
ROM
Program/Speech/Melody/Instrument waveform
256K×12 bits
Address Pointers/ STACK
SRAM (256 nibbles)
Sampling Rate Counter
×
4
Timing
Generator
OSC
Volume
Control
PWM
8bit D/A
IO1
IO2
Timer
ALU
IO3
IO4
Voice
Synthesizer
IO5
IO6
4. PIN ASSIGNMENT
Symbol
P13 ~ P10
P23 ~ P20
P33 ~ P30
P43 ~ P40
P53 ~ P50
P63 ~ P60
VDD
GND
XIN
RST
XOUT/OSC
CKSEL
I/O
I/O
I/O
I/O
I/O
I/O
I/O
P
P
I
I
O
I
Function Description
Bit3 ~ Bit0 of I/O port 1
Bit3 ~ Bit0 of I/O port 2
Bit3 ~ Bit0 of I/O port 3
Bit3 ~ Bit0 of I/O port 4
Bit3 ~ Bit0 of I/O port 5
Bit3 ~ Bit0 of I/O port 6
Positive power supply
Negative power supply
Crystal In
Chip Reset (Active high)
Crystal Out / Rosc In
Clock type select (Internal pull low)
‘L’ or floating
→
RC oscillator
‘H’
→Crystal
Positive Output of PWM or DA1
Negative Output of PWM or DA2
BUO1/VO1
BUO2/VO2
O
O
Ver: 1.3
4
June 8, 2005
SONIX [ SONIX TECHNOLOGY COMPANY ]
