Rainbow Electronics HD44780 User Manual
Page 54
HD44780U
54
Electrical Characteristics Notes
1. All voltage values are referred to GND = 0 V.
V
CC
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 =
V
CC
–V5
V
CC
–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
V
CC
V
CC
PMOS
NMOS
(pull up MOS)
PMOS
V
CC
PMOS
NMOS
V
CC
NMOS
NMOS
V
CC
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
V
CC
(input circuit)
PMOS
PMOS
Input enable