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DEH-P945R,DEX-P99R
- Pin Functions (SED1540F0A)
Pin No.
Pin Name
1-72
SEG71-0
73
A0
74,75
OSC1,2
76
E(rd)
77
R/w(wr)
78
VSS
79-86
DB0-7
87
VDD
res
88
89
FR
90
V3
cs
91
92
NC
93
M/S
94,95
V2,1
96-99
COM0-3
100
SEG72
SED1540F0A
100
1
30
31
92
I/O
Function and Operation
O
Output for driving segment of LC
I
Normally the lowest bit in the address bus of MPU is connected to distinguish
between data and command.
Terminal to connect resistor for internal oscillation
I
Enable clock input terminal of 68-system MPU
Terminal to connect RD signal of 80-system MPU. While this signal is set to "L,"
data bus of SED1540 will be output.
I
Input terminal of read/write control signal
Terminal to connect write signal of 80-system MPU
0V connect to system GND
8-bit duplex data bus to be connected to a data bus of 8-bit or 16-bit standard MPU
Connect to +5V power supply VDD
Can be set to initial setting by setting RES to "L" when using 68-system MPU,
or by setting RES to "H" when using 80-system MPU.
I/O
Input/output terminal of LC alternating signal
Multilevel power supply for driving LC
I
Chip select signal. Normally, signal obtained by decoding address bus signal is input.
Not used
Terminal to select between master and slave operation to SED1540. Connect to
VDD or VSS.
Multilevel power supply for driving LC
O
Output for LC common (low) driving
I/O
Output for driving segment of LC
81
80
51
50
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