HD44780 Hitachi Semiconductor (acquired by Renesas), HD44780 Datasheet - Page 54

• Manufacturer Part Number: HD44780
• Description: Dot Matrix Liquid Crystal Display Controller/driver
• Manufacturer: Hitachi Semiconductor (acquired by Renesas)

HD44780U
Electrical Characteristics Notes
1. All voltage values are referred to GND = 0 V.
2. V
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.
54
Input pin
Pin: E (MOS without pull-up)
I/O Pin
Pins: DB0 –DB7
(MOS with pull-up)
V
CC
CC
V1
V5
V1 V2 V3 V4 V5 must be maintained.
(pull-up MOS)
A
PMOS
NMOS
B
V
CC
PMOS
A =
B =
A
B
Pins: RS, R/W (MOS with pull-up)
V
V
1.5 V
0.25
(pull up MOS)
CC
CC
V
–V5
–V1
V
CC
CC
A
PMOS
NMOS
NMOS
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.
(input circuit)
PMOS
NMOS
PMOS
V
V
CC
CC
PMOS
NMOS
(output circuit)
(tristate)
Input enable
Output pin
Pins: CL1, CL2, M, D
V
Output enable
Data
CC
PMOS
NMOS