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