Pin Description - Sony ST-H2750 Service Manual

| ST-H2750/H3750
4-6. PIN DESCRIPTION
@iC701 System Controller (TMP87CC70F)
1/0 ACTIVE PIN FUNCTION
HOLD detecting interrupt terminal
HOLD resetting interrupt terminal
Not in use
IF count NG output
TUNING LED ON
PRESET LED ON
AUDIO BUS input
AUDIO BUS output
Test terminal
Low frequency oscillator connection terminal (32KHz)
Low frequency oscillator connection terminal (32KHz)
Reset signal input
High frequency oscillator connection terminal (8MHz)
High frequency oscillator connection terminal (8MHz)
GND
Not in use
Not in use
PLL serial clock output
PLL serial data input
PLL serial data output
Not in use
PLL. chip enable
Not in use
Main sound selection terminal (Not in use)
Sub sound selection terminal (Not in use)
Sound dual signal detection terminal (Not in use)
Not in use
MUTING output
TUNED input
STEREO input
SIRCS input
+5V
Not in use
FL tube digit output
FL tube segment output
SIGNAL IN
STEREO IN
Not in use
VKK FL tube driving power supply
KI0 - KI4 Key input
Not in use
Not in use
Key output
Data input/output for EEPROM
Clock output for EEPROM
KOO - KO3
SDA
SCL