22
R-7H55
Pin No.
Signal
I/O
Description
19
AVSS
IN
Reference voltage input terminal.
A reference voltage apllied to the A/D converter in the LSI. T he reference voltage is
generally maintaned at -5V.
20
AN0
IN
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the themistor, this
input is converted into temperature by the A/D converter built into the LSI.
21
AN1
IN
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to the
A/D converter built into the LSI.
22
AN2
IN
Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an
analog input terminal from the AH sensor circuit, and connected to the A/D converter built
into the LSI.
23-27
AN3-AN7
OUT
Used for initial balancing of the bridge circuit(absolute humidity sensor)
28
AN8
IN
Connected to GND.
29-31
AN9-AN11
IN
Heating constant compensation terminal.
32/33
AVCC/VCC
IN/IN
Connected to GND.
34
INT1
IN
Signal synchronized with commercial source frequency(50Hz).
This is basic timing for time processing of LSI.
35
D1
OUT
Segment data signals.
The relation between signals and indicators are as follows:
Signal ..... segment
Signal ..... segment
D1 ................... UB
R91 ......................f
D9 ...................... k
R92 ..................... g
R80 .................... a
R93 ...................... j
R81 .................... b
R10 ..................... p
R82 .................... c
R11 ..................... h
R83 .................... d
R12 ..................... n
R90 .................... e
R13 .................. LB
Refer to the touch control panel circuit for the relationship between signals and
indicators. Normally, one pulse is output in every synchronized signal (ß) period, and
input to the anode of the fluorescent display.
36
D2
OUT
Digit selection signal.
The relationship between digit signal and digit are as
follows:
Digit signal
Digit
D2 ............................ 1st.
D4 ........................... 2nd.
D5 ............................ 3rd.
D6 ............................ 4th.
D7 ............................ 5th.
D8 ............................ 6th.
Refer to the touch control panel circuit about the
relation between signals and digits. Normally, one
pulse is output in every synchronized signal (ß)
period, and input to the grid of the fluorescent display.
37
D3
OUT
Signal to sound buzzer.
A: key touch sound(0.12sec.).
B: Completion sound(2.4sec.).
38-42
D4-D8
OUT
Digit selection signals.
Signal similar to D2.
43
D9
OUT
Segment data signals.
Signal similar to D1.
ß(50Hz)
GND
VP
(D12)
(ß : INTO signal)
H
L
GND
VP
ß(50Hz)
D2
D4
D5
D6
D7
D8
(ß : INTO signal)
Summary of Contents for R-7H55
Page 2: ...R 7H55 ...
