Rainbow Electronics HD44780 User Manual
Page 53
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HD44780U
53
Interface Timing Characteristics with External Driver
Item
Symbol
Min
Typ
Max
Unit
Test Condition
Clock pulse width
High level
t
CWH
800
—
—
ns
Figure 27
Low level
t
CWL
800
—
—
Clock set-up time
t
CSU
500
—
—
Data set-up time
t
SU
300
—
—
Data hold time
t
DH
300
—
—
M delay time
t
DM
–1000
—
1000
Clock rise/fall time
t
ct
—
—
100
Power Supply Conditions Using Internal Reset Circuit
Item
Symbol
Min
Typ
Max
Unit
Test Condition
Power supply rise time
t
rCC
0.1
—
10
ms
Figure 28
Power supply off time
t
OFF
1
—
—
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