HD44780U Datasheet, PDF (53/59 Pages) Hitachi Semiconductor – Dot Matrix Liquid Crystal Display Controller/Driver

HD44780U
Interface Timing Characteristics with External Driver
Item
Clock pulse width
Clock set-up time
Data set-up time
Data hold time
M delay time
Clock rise/fall time
Symbol Min
Typ
High level
Low level
t _CWH
t _CWL
t _CSU
t _SU
t _DH
t _DM
t _ct
800
—
800
—
500
—
300
—
300
—
–1000 —
—
—
Max
Unit
—
ns
—
—
—
—
1000
100
Test Condition
Figure 27
Power Supply Conditions Using Internal Reset Circuit
Item
Power supply rise time
Power supply off time
Symbol Min
Typ
Max
Unit
Test Condition
t _rCC
0.1
—
10
ms
Figure 28
t _OFF
1
—
—
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