19
KVT-727DVD/727DVDY
●
Audio Microcomputer: 703068YGJ128A (X34: IC303)
Pin No.
Pin Name
Module
I/O
Application
Truth Value
Processing Operation Description
(physical)
Table
1
DC_ERR
IC2 VI
I
DC offset detection
Low at the detection
2
LINE_MUTE
DC-CN
I
LINE MUTE detection
Normal: 1.6V, TEL MUTE: 1V or lower,
NAVI MUTE: 2.5V or higher
3,4
NC
NC
I
5
PORTGND0
µ
COM
6
AUDIO_SW1_A
Audio
O
LX/NAVI1/SW3 (or TV) /
q
Refer to truth value table
AVIN1 audio switching (For main)
7
AUDIO_SW1_B
Audio
O
LX/NAVI1/SW3 (or TV) /
q
Refer to truth value table
AVIN1 audio switching (For main)
8
AUDIO_SW2_A
Audio
O
TV/AVIN1/AVIN2 audio switching (For sub)
w
Refer to truth value table
9
AUDIO_SW2_B
Audio
O
TV/AVIN1/AVIN2 audio switching (For sub)
w
Refer to truth value table
10,11
NC
O
12~14
NC
NC
O
15
NC
O
L: MUTE ON, H: MUTE OFF
16
NC
O
17
NC
NC
O
When writing to E2PROM from outside,
18
EEPROM_WRT
EEPROM
I
Write detection at ROM correction
Hi is input with a jig. (Common use SCL
and SDA will stop operation)
In other cases: Low (Pull-down)
19
MUTE_AVOUT
MUTE
O
MUTE for AVOUT
L: MUTE ON, H: Normal
20
MUTE_PRE
MUTE
O
MUTE for PREOUT
L: MUTE ON, H: Normal
Hi: During POWER ON (Does not come
21
P_CON
DC-CN
O
External amp power supply control
On during STANDBY),
Low: During STANDBY or POWER OFF
22
PORTVDD0
µ
COM
23
EXT_CONT
DC-CN
O
External amp control
Hi at FMAM selection
→
Antenna UP
24
ANT_CONT
DC-CN
O
Power antenna control
H: Antenna UP,
In other cases Low
→
Antenna DOWN
25
P_ON
Power supply
O
SW5V
→
SW14V power supply ON/OFF control
H: ON, L: Normal
26
PWIC_MUTE
POWER-IC
O
POWER-IC MUTE control
L: MUTE ON (At POWER, ACC OFF,
STANDBY, momentary power down)
27
PWIC_STBY
POWER-IC
O
POWER-IC standby control
H: POWER ON, L: POWER OFF
28
NC
O
29
EEPROM_SDA
EEPROM
I/O
Data for EEPROM (ROM correction)
29
AUD_SDA
IC2 VI
I/O
Data for IC2 VI
30
EEPROM_SCL
EEPROM
I/O
Clock for EEPROM (ROM correction)
MICROCOMPUTER’S TERMINAL DESCRIPTION
