-19-
IC DESCRIPTION -1/2 (
µ
PD178078GF-565-3BA) -1/3
Pin No.
Pin Name
I/O
Description
1
BATT IN
I
BATT ON/OFF input.
2
DFP IN
I
Detects whether DFP (front panel) is provided or not.
3
LCD DI
I
LCD driver data input.
4
LCD DO
O
LCD driver data output. Open when not used.
5
LCD CLO
O
LCD driver clock output.
6
LCD CE
O
LCD driver chip enable output.
7
BBE 1
O
BBE select output. Open when not used. (Not used)
8
CDS DI
–
Connected to pull-down resistor.
9
CDS DO
–
Not used.
10
CDS CLO
–
Not used.
11
CD DI
I
Data input from CD changer. Pulled down when not used.
12
CD DO
O
Data output to CD changer. Open when not used.
13
CD CLI
I
Clock input from CD changer. Open when not used.
14
CD DISP SEL
O
Determines the timing with which data is transferred to the head unit. Open when not used.
15
CD CONNECT
I
CD changer connection check. Pulled down when not used.
16
BBE 2
O
BBE select output. Open when not used. (Not used)
17
CD CLO
O
Clock output to CD changer. Open when not used.
18
EVOL CLO
O
Clock output to electronic VR.
19
EVOL DO
O
Data output to electronic VR.
20
EVOL CE
O
Chip enable output to electronic VR.
21
LOC/DX
O
LOC/DX switching output during radio seek. (LOC: "H", DX: "L"). Open when not used.
22
DSSA CONT
O
Outputs "H" only when DSSA L/R are operating.
23
NC
–
Not connected.
24
PHONE MUTE
I
Muting control input -20dB. Mute: "L". Connected to pull-up resistor.
25
LEVEL IND
I
Level meter signal input.
26
AUTO VOL
I
Detects microphone input for auto volume operation. Pulled down when not used. (Not used)
27
AVDD
–
Power supply.
28
TEST
–
Only used in CD model. (Not used)
29, 30
NC
–
Not connected.
31
FM/AM S METER
I
AF signal input during RDS AF operation and FM S meter signal input.
32
AVSS
–
Ground.
33
REG CPU
–
CPU power regulator.
34
VDD
–
Power supply for port.
35
REG OSC
–
Regulator for oscillator circuit. (Connected to VDD)
36
X2
O
System clock oscillator. (6.3MHz)
37
X1
I
System clock oscillator. (6.3MHz)
38
GND
–
Ground for port.
39
IF REQ
O
Output to request IF count signal.
40
GND
–
Ground.
41
AM IF
I
AM IF count signal input.
42
FM IF
I
FM IF count signal input.
43
VDD PLL
–
Power supply for PLL.