SNC88040
24-Channel MIDI/Speech Controller
3 PIN ASSIGNMENT
Symbol
P00 ~ P07
P10 ~ P17
P20 ~ P27
VDDVR
GNDVR
VDDPP
GNDPP
CVDD
I/O
Function Description
I/O Bit7 ~ Bit0 of I/O port 0
I/O Bit7 ~ Bit0 of I/O port 1
I/O Bit7 ~ Bit0 of I/O port 2
P
P
P
P
P
P
P
P
I
Positive power supply for ROSC
Negative power supply for ROSC
Positive power supply for Direct Drive
Negative power supply for Direct Drive
Positive power supply for internal circuit
Positive power supply for I/O
Negative power supply
3V regulator output
VDD
GND
REGOUT
RST
Chip Reset (Active low)
High clock Crystal In
XIN
I
XOUT
O
I
High clock Crystal Out
Low clock Crystal In
LXIN
LXOUT
O
Low clock Crystal Out
Clock type select
CKSEL
I
‘VDD’ RC oscillator
‘GND’ Crystal
TestM
VO1
VO2
BN0
BP0
I
Test Pin
O
O
O
O
DA1 output
DA2 output
Direct Drive negative output
Direct Drive positive output
4
Ver: 1.5
Sep 08, 2006