Kenwood FZDA07ELEF2 Service Manual page 26

FZDA07ELEF2/EREF2/MRHF2
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name
26,27 NC
28 HTR
29 BRIGHT
30 FLASH_MOD
31 R-DEF
31 P22
32 F-DEF
33 KEY_DET
34~36 ENC_L3~ENC_L1
37~39 ENC_R3~ENC_R1
40,41 KR3, KR2
41 P10
42,43 KR1, KR0
44~46 KS2~KS0
47 NC
48 SCL
49 SDA
FLASH: [C]
50
MASK: [NC]
51,52 NC
53 HTR_ECU_TX
54 HTR_ECU_RX
55 FL_BLK
56 ILL_DET-
57 VCC
58 ILL_DET+
59 FL_FIL_ON
60 FL_LAT
61 FL_CLK
61 FLASH_CLK
62 FL_SO
62 FLASH_SO
63 FLASH_SI
63 NC
64 DC_DC_ON
26
I/O Application
O Not used
Terminal for determining bright terminal valid/
O
invalid
Output terminal for bright information from
O
vehicle
I Input terminal for FLASH writing setting
O Rear DEF indicator control terminal
I Input terminal for FLASH writing setting
O Front DEF indicator control terminal
O Panel key operation check
I Rotary encoder (left) pulse count input terminal
I Rotary encoder (right) pulse count input terminal
I Key scan pulse input terminal
I Input terminal for FLASH writing setting
I Key scan pulse input terminal
I/O Key scan pulse output terminal
O Not used
I/O Outputs clock to E2PROM
I/O Outputs serial data to E2PROM
In FLASH products, connect 0.1µF, and in
-
MASK products, NC (no connection)
O Not used
O HTR-C µ-com → HTR-C ECU
I HTR-C ECU → HTR-C µ-com
O FL display tube blank control terminal
I ILL- detection (pulse input)
- Power supply terminal
I ILL+ detection
I/O FL tube fi lament power supply control SW
O FL data latch control terminal
O FL clock output terminal
Clock output to ROM writer
O
(For FLASH µ-com only)
O FL data output terminal
Data output to ROM writer
O
(For FLASH µ-com only)
Data input from ROM writer
I
(For FLASH µ-com only)
O For mask µ-com, Not used
I/O FL tube power supply control terminal
Processing Operation Description
Output L fi xed
Start operating when the heater control µ-com IGN ON,
and at the point when the air-conditioner data is fi nalized at
UART, ON. H: ON, L: OFF
At the point when the bright data is fi nalized at UART, ON.
H: ON, L: OFF
Always L input
LED luminance control by PWM control, 2 steps brightness,
4ms cycle PWM
H: When writing FLASH µ-com
LED luminance control by PWM control, 2 steps brightness,
4ms cycle PWM
When key or encoder is input, "H" is output at 100ms
(in test mode only)
H: When writing FLASH µ-com
Output L fi xed
Output L fi xed
4800bps
4800bps
FL display tube luminance control by PWM control
H: Blank (display OFF)
ILL ON: H
Hi-Z: OFF, L: ON. Timing is the same as DC_DC_ON
Execute output OFF count while not displayed.
Sync clock output while VFD serial communication
Clock transmission to ROM writer
(communication speed is dependent on ROM writer)
Display data transmission to VFD
Data transmission to ROM writer
(communication speed is dependent on ROM writer)
Data reception from ROM writer
(communication speed is dependent on ROM writer)
Output L fi xed
Hi-Z: ON, L: OFF