Rainbow Electronics HD44780 - Manual (Page 53)

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 — —