Ic Pin Function Description - Sony XR-CA350X Service Manual

5-7. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC1 MN101C49HAS (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VREF –
2
VSM
3 to 6
NC
7 QUALITY
8 MPTH
9
NC
10 VREF +
11 VDD
12 OSC2
13 OSC1
14
VSS
15 XI
16 XO
17 MMOD
18 LCD-SO (TX)
19 LCD-SI (RX)
20 LCD-CKO
21 to 23 NC
24 SYS-RES
25 BUS-ON
26 KEYACK
27 DAVN
28 BU-IN
29
NC
30 TU-ATTIN
31, 32 NC
33 RESET
34 NC
35
BEEP
36
POWER-ON
37 ILL-IN
38 ACC-IN
39 NC
40
TEL-ATT
41 NCI
42 BUS-SO
43 BUS-SI
44 BUS-CKO
45 I2C-SIO
46 NC
47 I2C-CKO
48 AMP-ON
49 AMP-ATT
I/O
— Reference voltage (0V) terminal (for A/D converter)
I FM and AM signal meter voltage detection input from the tuner unit (A/D input)
I
Not used
I
Not used
I Not used
I
Not used
—
Reference voltage (+5V) terminal (for A/D converter)
—
Power supply terminal (+5V)
O Main system clock output terminal (18.432 MHz)
I Main system clock input terminal (18.432 MHz)
—
Ground terminal
I
Sub system clock input terminal (32.768 kHz)
O Sub system clock output terminal (32.768 kHz)
I
Setting terminal for the single chip mode
O
LCD serial data output to the liquid crystal display driver
I
LCD serial data input from the liquid crystal display driver
O LCD serial transfer clock signal output to the liquid crystal display driver
O
Not used
O
System reset signal output to the SONY bus interface "L": reset
O
Bus interface control signal output to the SONY bus interface "L": uni-link on
I Key acknowledge signal detection input from the liquid crystal display driver
I
Not used
Battery detection signal input from the bus interface and battery detect circuit
I
"L" is input at low voltage
I
Not used
I
Tuner muting on/off control signal input from the tuner unit "L": muting on
I
Not used
System reset signal input from the reset signal generator and reset switch "L": reset
I
"L"is input for several 100 msec after power on, then it changes to "H"
O
Not used
O Beep sound drive signal output to the power amplifier "H": beep on
O Main system power supply on/off control signal output "H": power on
I Illuminate line detection signal input terminal "L": ill on Not used
Accessory detection signal input "L": accessory on
I
"H" is input for several 200 msec after accessory on, then it changes to "L"
O Not used
Telephone muting signal input terminal At input of "H", the signal is attenuated by –20 dB
I
Not used
I Not used
O Serial data output to the SONY bus interface
I Serial data input from the SONY bus interface
O Serial data transfer clock signal output to the SONY bus interface
I/O
Two-way data bus with the tuner unit and electrical volume
O Not used
O
Serial data transfer clock signal output to the tuner unit and electrical volume
Standby on/off control signal output to the power amplifier
O
"L": standby mode, "H": amplifier on
O Muting on/off control signal output to the power amplifier "L": muting on
Description
"L": single chip (fixed at "L" in this set)
XR-CA350X
21