Kenwood KDC-W6531, Service Manual

Page: 7 / 44

KDC-W6531/W6531Y
/X589/X7529
7
MICROCOMPUTER’S TERMINAL DESCRIPTION
●
MAIN MICROCOMPUTER 30624MWPA35GP (X34 : IC1)
Pin No. Pin Name
Module
I/O Application
Truth
Processing Operation Description
(functional) Value Table
1 REMO EXTRA I Remote controller signal input Pulse width is detected.
2 LX_MUTE LX_M I Mute request from slave unit H : Mute ON, L : Mute OFF
3 AUD_SDA AUDIO I/O E-VOL data output terminal
4 AUD_SEL AUDIO O E-VOL control terminal
5 AUD_SCL AUDIO O E-VOL clock output terminal
6 BYTE
µ
COM -
7 CNVSS
µ
COM -
8 XCIN
µ
COM I
9 XCOUT
µ
COM I
10 RESET
µ
COM -
11 XOUT
µ
COM -
12 VSS
µ
COM -
13 XIN
µ
COM - 12.0MHz
14 VCC1
µ
COM -
15 NMI
µ
COM I Not used.
16 CN_DET EXTRA I Panel communication detection H : No PANEL, L : With PANEL
17 RDS_CLK TUNER I
RDS decoder CLK input terminal
(RDS Model only)
17 NC O Not used. (Other than RDS Model) Output L-fixed
18 LX_REQ_S LX_M I Communication request from slave unit
19 PON_AM Power supply I/O AM power supply control
AM in operation : H,
AM not in operation : Hi-z
20 LX_REQ_M LX_M O Communication request to slave unit
21 TUN_IFC_OUT TUNER I F/E IFC OUT input terminal H : With station, L : No station
22 RDS_AFS_L TUNER I/O Constant switching at noise detection
r
Refer to truth value table.
23 RDS_AFS_M TUNER I/O Constant switching at noise detection
r
Refer to truth value table.
24 RDS_QUAL TUNER I
RDS decoder QUAL input terminal
(RDS Model only)
24 NC O Not used. (Other than RDS Model) Output L-fixed
25 RDS_DATA TUNER I
RDS decoder DATA input terminal
(RDS Model only)
25 NC O Not used. (Other than RDS Model) Output L-fixed
26 PWIC_BEEP PWIC O Beep output
27 TUN_SCL TUNER I/O F/E I2C clock input/output terminal (MAX400kHz)
28 TUN_SDA TUNER I/O F/E I2C data input/output terminal
29 VFD_SYS_DATA toPANEL O VFD data output terminal Data output
30 VFD_PAN_DATA toPANEL I VFD data input terminal Data input
31 VFD_CL toPANEL O VFD clock output terminal 125kHz
32 VFD_INH toPANEL O VFD data blanking output H : Light ON, L : Light OFF
33 SDA/CD_SDA CD I/O
CD mechanism I2C data input/output
terminal
33 SDA/ROMCOR_SDA EXTRA I/O
ROM correction E2PROM I2C data
input/output terminal
34 SCL/CD_SCL CD I/O CD mechanism I2C clock output terminal