Sony XR-CA330 Installation/Connection, Руководство по обслуживанию

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25
XR-CA330/CA340
5-7. IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC1 MN101C49GTH (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 VREF – —
Reference voltage (0V) terminal (for A/D converter)
2 VSM I FM and AM signal meter voltage detection input from the FM/AM tuner unit (A/D input)
3 to 6
NC
—
Not used
7 NOISE-DET I
Not used
8 MPTH I Not used
9
NC
—
Not used
10 VREF + —
Reference voltage (+5V) terminal (for A/D converter)
11 VDD — Power supply terminal (+5V)
12 OSC2
O Main system clock output terminal (18.432MHz)
13 OSC1
I Main system clock input terminal (18.432MHz)
14 VSS — Ground terminal
15 XI I
Sub system clock input terminal (32.768kHz)
16 XO O
Sub system clock output terminal (32.768kHz)
17 GND (MMOD) — Setting terminal for the single chip mode “L”: single chip
18 LCD-SO (TX) O
LCD serial data output to the liquid crystal display driver
19 LCD-SI (RX) I
LCD serial data input from the liquid crystal display driver
20 LCD-CKO O LCD serial transfer clock signal output to the liquid crystal display driver
21 TU-SDA O
Serial data output to the FM/AM tuner unit
22 TU-SI I
Serial data input from the FM/AM tuner unit
23 TU-SCL O Serial data transfer clock signal output to the FM/AM tuner unit
24 LCD-RES O
LCD reset signal output to the liquid crystal display driver “L”: reset
25 LCD-CE O
Chip enable signal output to the liquid crystal display driver “H” active
26 KEYACK I Key acknowledge signal detect input from the liquid crystal display driver
27 DAVN-RDS I
Not used
28 B/U-IN I
Battery detect signal input from the bus interface and battery detect circuit
“L” is input at low voltage
29 NC — Not used
30 RAM BU I
Internal RAM reset detection signal input terminal
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset “L”: RAM reset
31 TEST-IN I Setting terminal for the test mode “L”: test mode Normally: fixed at “H”
32
NCI
I
Not used
33 RESET I
System reset signal input from the reset signal generator or reset switch “L”: reset
“L” is input for several 100 msec after power on, then it changes to “H”
34 TU-ENABLE O Chip enable signal output to the FM/AM tuner unit “H” active
35
BEEP O Beep sound drive signal output to the power amp
36
POWER-ON O Main system power supply on/off control signal output terminal “H”: power on
37 ILL-IN I Not used
38 ACC-IN
I Accessory detect signal input terminal “L”: accessory on
39
NC
—
Not used
40
TEL-MUTE I
Telephone muting signal input terminal At input of “H”, the signal is attenuated by –20 dB
Used for the XR-CA340 only
41 NCI
I Not used
42 UNI-SO
O Serial data output to the bus interface
43 UNI-SI
I Serial data input from the bus interface
44 UNI-CKO
O Serial data transfer clock signal output to the bus interface