Ic Pin Function Description - Sony XR-4300RV Service Manual

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6-13. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 MB90574BPMT-G-267-BND (SYSTEM CONTROLLER)
Pin No. Pin Name
1 TU-ON
2 ANT CUT
3 BUS-ON
4 to 6
NCO
7
ILL-ON
8 VCC
9 E2P SIO
10 E2P CKO
11 SYSRST
12 DOORSW
13 LCD SO
14 LCD CKO
15 LCD CE
16
BEEP
17 UNISI
TE
L 13942296513
18 UNISO
19 UNICKO
20 UNICKI
21
CD/MD
22
FLASH-W
23
NCO
24 SIRCS
25 to 28
NCO
29 DOOR-IND
30
IFWIDTH
31
NCO
32 NS MASK
33
VSS
34 C
35 AD-ON
www
36 RE-IN0
37 RE-IN1
.
38 DVCC
39 DVSS
28
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I/O
Tuner system power supply on/off control signal output to the BA4908 (IC671)
O
"H": tuner power on
Tuner system power supply on/off control signal output terminal "H": tuner power on
O
Not used (open)
Bus on/off control signal output to the SONY bus interface (IC701) "L": bus on
O
Used for the XR-C5300RV,not used (open) for the XR-4300RV
O
Not used (open)
Power on/off control signal output of the illumination LED and liquid crystal display driver
O
(IC901) "H": power on
— Power supply terminal (+5V)
I/O Two-way data bus with the FM/AM tuner unit (TU1)
I/O Two-way data bus with the FM/AM tuner unit (TU1)
Reset signal output to the SONY bus interface (IC701) "L": reset
O
Used for the XR-C5300RV,not used (open) for the XR-4300RV
I
Front panel open/close detection signal input "L" is input when the front panel is closed
O Serial data output to the liquid crystal display driver (IC901)
O Serial data transfer clock signal output to the liquid crystal display driver (IC901)
O Chip enable signal output to the liquid crystal display driver (IC901) "H" active
O Beep sound drive signal output terminal
Serial data input from the SONY bus interface (IC701)
I
Used for the XR-C5300RV,not used (fixed at "L") for the XR-4300RV
Serial data output to the SONY bus interface (IC701)
O
Used for the XR-C5300RV,not used (fixed at "L") for the XR-4300RV
Serial data transfer clock signal output to the SONY bus interface (IC701)
O
Used for the XR-C5300RV,not used (fixed at "L") for the XR-4300RV
Serial data transfer clock signal input from the SONY bus interface (IC701)
I
Used for the XR-C5300RV,not used (fixed at "L") for the XR-4300RV
I
CD/MD selection signal input terminal Not used (fixed at "L" in this set)
Internal flash memory data write mode detection signal input terminal "L": data write mode
I
Not used (fixed at "H" in this set)
O
Not used (open)
I Sircs remote control signal input form the remote control receiver (IC951)
O
Not used (open)
LED drive signal output of the door indicator (LED801) "H": LED on
O
"H" is output to turn on LED when front panel is opened
I
IF band detection signal input terminal Not used (open)
O
Not used (open)
O Discharge control signal output for the noise detection circuit "H": discharge
—
Ground terminal
—
Connected to coupling capacitor for the power supply
A/D converter power control signal output terminal
O When the KEYACK (pin uh) that controls reference voltage power for key A/D conversion input
is active, "L" is output from this terminal to enable the input
I
x Dial pulse input of the rotary encoder (RE901) ao
y
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
I
i
—
Power supply terminal (+5V) (for D/A converter)
—
Ground terminal (for D/A converter)
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