Sony Ericsson XR-C7500RX User Manual
Page 36
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MAIN BOARD IC600 MB90574BPMT-G-265-BND (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
NC
O
Not used (open)
2
AMSIN
I
Whether a music is present or not from CXA2510AQ (IC250) is detected at auto music sensor
“L”: music is present, “H”: music is not present
3
AMSON
O
Tape auto music sensor control signal output to the CXA2510AQ (IC250)
“L” is output to lower the gain for audio level at FF/REW mode
4
SA LAT
O
Serial data latch pulse output for spectrum analyzer section to the liquid crystal display drive
controller (IC800)
5
ATT
O
Audio line muting on/off control signal output terminal “H”: muting on
6
SYSRST
O
System reset signal output to the liquid crystal display drive controller (IC800) and SONY bus
interface (IC500) “L”: reset
7
F/R
O
Forward/reverse direction control signal output to the CXA2510AQ (IC250)
“L”: reverse direction, “H”: forward direction
8
VCC
—
Power supply terminal (+5V)
9
TAPE ATT
O
Tape muting on/off control signal output to the CXA2510AQ (IC250) “H”: muting on
Active at ATA, FF/REW mode
10
T. ROM-SDA
I/O
Two-way data bus for tuner EEPROM with the FM/AM tuner unit (TUX1)
11
T. ROM-SCL
I/O
Two-way bus clock signal for tuner EEPROM with the FM/AM tuner unit (TUX1)
12
RX
I
Input terminal at the flash memory data write mode
Front panel open/close detection signal input terminal
“L” is input when the front panel is closed
13
TX
O
Output terminal at the flash memory data write mode
Display serial data output to the liquid crystal display driver (IC901)
14
BUS-ON
O
Bus on/off control signal output to the liquid crystal display drive controller (IC800) and SONY
bus interface (IC500) “L”: bus on
15
BEEP
O
Beep sound drive signal output terminal
16
NC
O
Not used (open)
17
UNISI
I
Serial data input from the SONY bus interface (IC500)
18
UNISO
O
Serial data output to the SONY bus interface (IC500)
19
UNICKO
O
Serial clock signal output to the liquid crystal display drive controller (IC800) and SONY bus
interface (IC500)
20
IF-BW
I
Tuner wide/narrow select signal input terminal “L”: wide, “H”: narrow
Not used (fixed at “L”)
21
SW SHIFT
O
Not used
22, 23
NC
O
Not used (open)
24
SIRCS
I
Sircs remote control signal input from the remote control receiver (IC951)
25
DSPSI
I
Serial data input from the CXD2726Q (IC100)
26
DSPSO
O
Serial data output to the CXD2726Q (IC100)
27
DSPCKO
O
Serial data transfer clock signal output to the CXD2726Q (IC100) and liquid crystal display drive
controller (IC800)
28
DSPPLL
O
PLL clock control signal output terminal Not used (open)
29
DSPMST
O
Bit clock (BCK) and L/R sampling (LRCK) signal master/slave mode selection signal output
terminal “L”: master mode, “H”: slave mode Not used (open)
30
NC
O
Not used (open)
31
VOLATT
O
Pre amplifier muting on/off control signal output to the electrical volume (IC10)
“L”: muting on
32
TUMUTE
O
Muting on/off control signal output of the FM/AM tuner signal “L”: muting on
33
VSS
—
Ground terminal
34
C
—
Connected to coupling capacitor for the power supply Not used (open)