Kenwood KDC-MP538U Service Manual page 6

KDC-MP538U/MP6039/MP6539U/
W6041U/W6141UY/W6541U/W6641UY/X592
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name
39 ROMCOR DET
39 EPM
40 CD MOTOR
41 CD LOE LIM SW
42 CD LOS SW
43 CD DISC12 SW
44 PAN SC CON
45 CD LOEJ
46 S SOC REQ
47 SOC SSTOP
47 CD SRAMSTB
48 SOC SRST
48 CD RST
49 S SYS REQ
49 CD CCE
50 SOC MUTE
50 CD MUTE
51 PON D5V
52 PON
53 OEM DISP DATA I/O External display data
54 OEM DISP CLK I/O External display clock
55 OEM DISP CE
56 P CON
57 ANT CON
58 NC
59 ILLUMI DET
60 VCC2
61 MUTE 0
62 VSS
63 MUTE 1
64 MUTE 2
65 LINE MUTE
66~68 NC
69 MUTE SA
70 PWIC DC DET
6
I/O Application
I ROM correction writing request
EPM input while writing
I
Possible to rewrite in Lo at the start-up
O CD motor control
I CD detection (Chucking detection)
I CD loading detection
I 12cm disc detection
Panel operation control
O
CE when system μ-COM program is rewritten
I/O CD motor control
I Communication request from SOC to system μ-COM
O SOC stop
O Decoder SRAM standby control (MP6039)
O SOC reset
O CD mechanism μ-COM reset (MP6039)
O Communication request from system μ-COM to SOC
O CD mechanism chip enable (MP6039)
I DAC mute request
I DAC mute request (MP6039)
I/O For USB / FDC 5V power supply control
I/O Power supply control
I/O External display control request
I/O P-CON control
O Antenna control
- Not used
I Dimmer illumination detection
-
O E-VOL FRONT MUTE control
-
O E-VOL REAR MUTE control
O IC-2 SW MUTE control
I Line mute detection
- Not used
IC-2 MUTE A control
I/O
Spectrum analyzer mute
I DC offset detection
Truth Value
Processing / Operation / Description
Table
H: Possible to rewrite in ROM correction
(I2C opened)
q Refer to the truth value table
H: Loading completed, L: No disc
L: Eject completed
L: 12cm disc
H: Normal, L: Panel operation stopped
q Refer to the truth value table
H: Normal, L: SOC stopped
L: SRAM standby
H: Normal, L: Reset (Bolero)
H: Normal, L: Reset
H: Mute requested, L: Normal
H: Mute requested, L: Normal
H: ON, Hi-Z: OFF
H: ON, Hi-Z: OFF
POWER ON: H, POWER OFF: Hi-Z,
STANDBY source: Hi-Z
TUNER source: H, POWER OFF: L,
STANDBY source: L
Output L fi xed
L: ON, H: OFF
L: Mute ON, H: Normal,
Time constant isolation setting: 10ms
L: Mute ON, H: Normal,
Time constant isolation setting: 10ms
L: Mute ON, H: Normal,
Time constant isolation setting: 10ms
(Countermeasure for IC-2 shock noise)
TEL mute: Below 1V, NAVI mute: Over 2.5V
Output L fi xed
L: Mute ON, Hi-Z: Normal,
Time constant isolation setting: 0.5ms