Microcomputer's Terminal Description - Kenwood DDX7032 Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION

● SYSTEM MICROCOMPUTER: 30878MJBA24GP (X15: IC404)
Pin No. Pin Name I/O
AV_SDA/TC_
1 I/O
SDA/E2P_SDA
2 NC O
3 HSY I
4 MIX_REMO I
5 SYS_MDATA O
6 SYS_SDATA I
7 SYS_CLK O
8 SYS_MREQ O
9 SYS_SREQ I
10 SYS_ON O
11 X0 O
12 X1 O
13 Y0 O
14 ACC_DET I
15 BYTE I
16 CNVSS I
17 XCIN I
18 XCOUT O
19 RESET I
20 XOUT O
21 VSS -
22 XIN I
23 VCC1 -
24 NMI I
25 BU_DET I
26 TV_SC_REQ I
27 TV_MC_REQ O
28 TV_SC_CON O
29 TV_SC_DATA I
30 TV_CLK O
31 TV_MC_DATA O
32 PWM O
33 POWER_PWM O
34 TV_JUDGE I
35 INV_PWM O
36 NAVI_RX I
37 NAVI_TX O
38 TXD O
39 VCC1 -
40 RxD I
41 VSS -
42 SCLK I
Application
Communication data between AV_SW, T/C, and
E2P
NC
Hsync input: For VCOM adjustment input from X35
Remote controller data input
Data output to AUDIO μ-com
Data input from AUDIO μ-com
Communication clock with AUDIO μ-com
Request to AUDIO μ-com
Request from AUDIO μ-com
ON/OFF control of AUDIO μ-com
Touch panel control
Touch panel control
Touch panel control
ACC detection
External data bus width switching
Terminal for writing data in μ-com
Sub clock input
Sub clock output
Main clock output
Main clock input
BU detection
Communication request from TV_COM
Communication request to TV_COM
Start request to TV_COM
DATA input from TV_COM
CLK output to TV_COM
DATA output to TV_COM
LCD brightness control
DC-DC_IC oscillation frequency control
Determination of TV_BOX if it is old or new
Inverter oscillation frequency control
Navi control data input
Navi control data output
Terminal for writing data in μ-com
Terminal for writing data in μ-com
Terminal for writing data in μ-com
DDX7032/7032M/712
DNX7120/7220/7320
True Value
Processing Operation Description
Table
L: ACC ON
Connected to Vss since this is a single chip
"L" during the normal operation
32.768kHz
32.768kHz
L: RESET
11.0592MHz
11.0592MHz
Not used
L: BU ON, H: Reduced voltage
PWM output
381kHz or 316kHz
H: Old, L: New
PWM output
11