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6-5. Ic Pin Function Description - Sony XR-C5080R Service Manual

Fm/mw/lw cassette car stereo.
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6-5. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 MN1886426SA (SYSTEM CONTROLLER)
Pin No.
Pin Name
1
TUNMUT
2
AMPON
3
ILLON
4
PW ON
5
AMPMUTE
6
RCIN1
7
VDD
8
X IN
9
X OUT
10
GND
11
XT IN
12
XT OUT
13
EX2
14
RESET
15
RDSCKI
16
BU IN
17
KEYACK
18
VOLSO
19
VOLCKO
20
VOLCE
21
TAPEMUT
22
LMLOD
23
LMEJ
24
AMSON
25
N/R OUT
26
AMSIN
27
PLLSO
28
PLLCKO
29
PLLCE
30
RDSSI
31
AD ON
32
DOLON
I/O
O
FM audio signal muting control output terminal "H": muting on
O
Standby control signal output to the power amplifier (IC801) "L": standby
Power supply on/off control signal output terminal at the illumination and liquid crystal display
driver (IC901) "H": power on
O
At power select switch (S801) on mode: "H" output at the accessory on
At power select switch (S801) off mode: "H" output at the power on
O
Main system power supply on/off control signal output to the BA3918 (IC601) "H": power on
O
Muting control signal output to the power amplifier (IC801) "L": muting on
I
Rotary remote commander shift key A/D input terminal
Power supply terminal (+5V)
I
Main system clock input terminal (8 MHz)
O
Main system clock output terminal (8 MHz)
Ground terminal
I
Sub system clock input terminal (32.768 kHz)
O
Sub system clock output terminal (32.768 kHz)
I
Connected to ground
System reset signal input from the reset signal generator (IC571) and reset switch (S601)
I
"L" is input for several 100 msec after power on, then it changes to "H"
I
Serial data transfer clock signal input from the RDS decoder (IC3)
I
Battery detect signal input terminal "H": battery on
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
I
and eject keys in the power off status On at input of "L"
O
Serial data output to the electrical volume (IC151)
O
Serial data transfer clock signal output to the electrical volume (IC151)
O
Chip enable signal output to the electrical volume (IC151)
O
Tape muting on/off control signal output to the CXA2509AQ (IC351) "H": tape muting on
Loading/tape operation motor control signal output to the MM1322XFBE (IC360)
O
(For the loading direction and forward side operation) *1
Loading/tape operation motor control signal output to the MM1322XFBE (IC360)
O
(For the eject direction and reverse side operation) *1
Tape auto music sensor control signal output to the CXA2509AQ (IC351)
O
"L" is output to lower the gain for audio level at FF/REW
Forward/reverse direction control signal output to the CXA2509AQ (IC351)
O
"L: forward direction, "H": reverse direction
Whether a music is present or not from CXA2509AQ (IC351) is detected at auto music sensor
I
"L": music is present, "H": music is not present
O
PLL serial data output to the FM/AM PLL (IC1)
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC1)
O
PLL serial chip enable output to the FM/AM PLL (IC1)
I
Serial data input from the RDS decoder (IC3)
O
Power supply on/off control signal output for the A/D converter "L": power on
Dolby control in/out terminal
At initial mode: valid/invalid selection input of dolby function ("L" input: valid)
I/O
At normal mode: dolby on/off control signal output ("H" output: dolby on)
Not used this function (fixed at "H")
Function
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