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6-5. IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC501 MN1886426S4H (SYSTEM CONTROLLER)
Pin No.
Pin Name
1
TUNMUT
2
AMPON
3
ILLON
4
PW_ON
5
AMPMUT
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
TE
L 13942296513
20
VOLCE
21
TAPEMUT
22
LMLOD
23
LMEJ
24
AMSON
25
N_ROUT
26
AMSIN
27
PLLSO
28
PLLCKO
29
PLLCE
30
RDSSI
31
AD_ON
32
DOLON
33
MTLON
34
CMON
35
TAPON
36
ACCON
37
PLLSI
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I/O
O
Tuner muting control pin At muting: "H"
O
Power amp power supply control pin
Illumination power supply control pin
At PW SEL on: ACC on: "H"
O
At PW SEL off: Power on: "H"
O
System power supply control pin
O
Power amp muting control pin At muting: "L"
I
Rotary remote commander input pin (A/D input)
–
Power supply
I
Main system clock input pin (8 MHz)
O
Main system clock output pin (8 MHz)
–
GND
I
Sub system clock input pin (32.768 kHz)
O
Sub system clock output pin (32.768 kHz)
–
Connected to GND
I
Reset input pin
I
RDS clock input pin
I
Back up power supply detection pin
O
Key acknowledge signal input pin
O
Data output pin to electrical volume
O
Clock output pin to electrical volume
O
Chip enable output pin to electrical volume
O
Tape muting control pin At muting: "H"
O
Loading motor control pin (loadig direction)
O
Loading motor control pin (eject direction)
O
At AMS: "L"
O
Forward/reverse control pin
I
Tape music with/without detection pin "L": with music
O
PLL data output pin
O
PLL clock output pin
O
PLL chip enable output pin
I
RDS data input pin
O
Power supply control pin for A/D conversion
DOLBY control input/output pin
I/O
At initial mode: valid/invalid selection input of DOLBY function
At normal mode: DOLBY on/off output
METAL control input/output pin (Fixed at "H" in this set)
I/O
At initial mode: valid/invalid selection input of METAL function
At normal mode: METAL on/off output
O
Capstan motor control pin
O
Tape power supply control pin
I
Accessory voltage detection pin
I
PLL data input pin
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2 9
8
Function
Q Q
3
6 7
1 3
1 5
"H" : on
co
.
– 35 –
9 4
2 8
0 5
8
2 9
9 4
2 8
m
9 9
9 9
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