34
6-17.
IC PIN FUNCTION DESCRIPTION
•
A BOARD IC110 MB89627RPF-G-642-BND (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
SDAI
I
Serial data input from the EEPROM (IC111)
2
SDAO
O
Serial data output to the EEPROM (IC111)
3
SCL
O
Shift clock signal output to the EEPROM (IC111)
4
M.MODE1
I
Mode signal (1) input terminal Not used (open)
5
M.MODE2
I
Mode signal (2) input terminal Not used (open)
6
M.MODE3
I
Mode signal (3) input terminal Not used (open)
7
W.MODE1
O
Monitor display selection control signal output to the liquid crystal display module
8
AD ACC
I
Accessory voltage detection signal input terminal (A/D input)
“L” is input at low voltage
9
AD BAT
I
Battery voltage detection signal input terminal (A/D input)
“L” is input at low voltage
10
W.MODE2
O
Monitor display selection control signal output to the liquid crystal display module
11
OPEN SEL
I
Model check signal input terminal
At the resetting, the signal at this terminal is read to check the model (fixed at “H”)
12
AVCC
—
Power supply terminal (+5V) (for A/D converter)
13
AVR
I
Reference voltage (+5V) input terminal (for A/D converter)
14
AVSS
—
Ground terminal (for A/D converter)
15
NC
—
Not used (open)
16
+B (SW) DET
I
Input terminal to detect the power supply (+12V) from the TV tuner unit
“H”: power present
17
ACC CHK
I
Accessory detection signal input terminal “H”: accessory on
18
+BAT MIN DET
—
Not used (open)
19
PICTURE
OFF IN
I
Picture off control signal input from the TV tuner unit
20
XRESET
I
System reset signal input from the TV tuner unit, reset signal generator (IC108) and reset switch
(S702)
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
21
MOD 0
I
Setting terminal for the CPU operational mode (fixed at “H” in this set)
22
MOD 1
I
Setting terminal for the CPU operational mode (fixed at “H” in this set)
23
X0
I
Main system clock input terminal (10 MHz)
24
X1
O
Main system clock output terminal (10 MHz)
25
VSS
—
Ground terminal
26 to 28
LED 1 to LED 3
O
LED drive signal output terminal “H”: LED on Not used (fixed at “L”)
29
LED 4
O
LED drive signal output of the V OFF (D711) indicator “H”: LED on
30
POWER CNTL
O
Power supply (+9V) on/off control signal output of the sensor circuit/motor circuit/panel block
“H”: power on
31
BEEP OUT
O
Beep sound drive signal output terminal
32
POWER SW
O
Power supply on/off control signal output to the TV tuner unit “H”: power on
33
PICTURE OFF
O
“H” is output to TL1453CPWR (IC501) in power circuit by the signal input to pin
ql
to turn off
the picture
34 to 37
KO 3 to KO 0
O
Key send signal output to the key matrix
38 to 41
KI 3 to KI 0
I
Key return signal input from the key matrix
42
HSEN 0
I
Set back detect switch (S32) input terminal
“L” is input when monitor base is housed completely “H” is input at other position
43
HSEN 1
I
Push out detect switch (S31) input terminal
“L” is input when monitor base comes out to the front (“L” is also input during watching of
picture)
