Ic Pin Function Description - Sony XR-C8220R Service Manual

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7-17. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC600 MB90574PFV-G-209-BND (SYSTEM CONTROLLER)
Pin No.
Pin Name
1
SEEKOUT
2
AF-SEEK
3
WIDE
4
ST-MONO
5
TUNMUTE
6
FM-ON
7
TU-ON
8
VCC
9
CSV-RST
10
BUS-ON
11
SYSRST
12
DOORSW
13
LCD SO
14
LCD CKO
15
BEEP
16
LCD CE
17
UNISI
18
UNISO
19
UNICKO
20
SD-IN
21
CSV-SO
22
CSV-CKO
23
CSV-CE
24
SIRCS
25
PLLSI
26
PLLSO
27
PLLCKO
28
PLLCE
29
ILL-ON
30
DIMMER
31
TIR-IND
I/O
Seek control signal output to the FM/AM tuner unit (TUX10)
AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM
O
FM mode: Used for SD speed up at SEEK, BTM, or AF
"L" is output at tuner off
PLL low-pass filter time constant selection signal output at AF SEEK
O
"H" is output when AF SEEK
IF band select signal output to the FM/AM tuner unit (TUX10) "H": wide mode
In receiving FM signals, interference noise from adjacent stations is removed by narrowing the
O
IF band automatically in the tuner unit so as to raise the selectivity, but in this case, the distortion
may increase and accordingly, the IF band is widened forcibly
FM stereo broadcasting detection signal input from the FM/AM tuner unit (TUX10), or forced
I/O
monaural control signal output to the FM/AM tuner unit (TUX10)
"L" is input in the FM stereo mode, or "L" is output in the forced monaural mode
O
Muting on/off control signal output of the FM and AM tuner signal "H": muting on
FM system power supply on/off control signal output to the BA3918 (IC502)
O
"L": AM power on, "H": FM power on
Tuner system power supply on/off control signal output to the BA3918 (IC502)
O
"H": tuner power on
Power supply terminal (+5V)
O
Reset signal output to the CSV (IC650)
O
Bus on/off control signal output to the SONY bus interface (IC602) "L": bus on
O
Reset signal output to the SONY bus interface (IC602) "L": reset
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 (IC900)
O
Serial data transfer clock signal output to the liquid crystal display driver (IC900)
O
Beep sound drive signal output terminal
O
Chip enable signal output to the liquid crystal display driver (IC900) "H" active
I
Serial data input from the SONY bus interface (IC602)
O
Serial data output to the SONY bus interface (IC602)
O
Serial data transfer clock signal output to the SONY bus interface (IC602)
Station detector detect input from the FM/AM tuner unit (TUX10)
I
Stop level for SEEK, BTM, etc. is determined SD is present at input of "H"
O
Serial data output to the CSV (IC650)
O
Serial data transfer clock signal output to the CSV (IC650)
O
Chip enable signal output to the CSV (IC650) "L" active
I
Sircs remote control signal input from the remote control receiver (IC901)
I
PLL serial data input from the FM/AM PLL (IC10)
O
PLL serial data output to the FM/AM PLL (IC10)
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC10)
O
PLL chip enable signal output to the FM/AM PLL (IC10) "H" active
Power on/off control signal output of the illumination LED and liquid crystal display driver
(IC900) "H": power on Depends on initial setting of power select switch (S600)
O
Power select switch (S600) on: "H" output at the accessory on
Power select switch (S600) off: "H" output at the power on
Dimmer control in/out terminal
At initial mode: The presence of dimmer select function is set (if this status, if "L" is input, the
I/O
dimmer select function is present)
At normal mode: LCD back light brightness control signal output
O
LED drive signal output of the TIR indicator (LED801) "H": LED on
Function
"L": reset
– 58 –

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