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HD44780 Datasheet(PDF) 54 Page - Hitachi Semiconductor

Part No. HD44780
Description  Dot Matrix Liquid Crystal Display Controller/Driver
Download  59 Pages
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Maker  HITACHI [Hitachi Semiconductor]
Homepage  http://www.renesas.com/eng
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 54 page
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HD44780U
54
Electrical Characteristics Notes
1. All voltage values are referred to GND = 0 V.
VCC
A
B
A
1.5 V
B
0.25
× A
The conditions of V1 and V5 voltages are for proper
operation of the LSI and not for the LCD output level.
The LCD drive voltage condition for the LCD output
level is specified as LCD voltage VLCD.
A =
B =
VCC –V5
VCC –V1
V1
V5
2. V
CC ≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ V5 must be maintained.
3. For die products, specified at 75
°C.
4. For die products, specified by the die shipment specification.
5. The following four circuits are I/O pin configurations except for liquid crystal display output.
PMOS
NMOS
VCC
VCC
PMOS
NMOS
(pull up MOS)
PMOS
VCC
PMOS
NMOS
VCC
NMOS
NMOS
VCC
PMOS
NMOS
(output circuit)
(tristate)
Output enable
Data
(pull-up MOS)
I/O Pin
Pins: DB0 –DB7
(MOS with pull-up)
Input pin
Pin: E (MOS without pull-up)
Pins: RS, R/W (MOS with pull-up)
Output pin
Pins: CL1, CL2, M, D
VCC
(input circuit)
PMOS
PMOS
Input enable




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