Motorola M68CPU32BUG Manuel d'utilisateur télécharger pdf (Page 35)

Bus Timing Characteristics

( Ta = - 20 to + 75°C )

Write-Cycle

2.7 - 4.5 V

(2)

4.5 - 5.5 V

(2)

2.7 - 4.5 V

(2)

4.5 - 5.5 V

(2)

Parameter

Symbol

Min

(1)

Typ

(1)

Max

(1)

Unit

Enable Cycle Time t

1000 500 - - - ns

Enable Pulse Width (High) t

450 230 - - - ns

Enable Rise/Fall Time t

, t

- - - 25 20 ns

Address Setup Time t

60 40 - - - ns

Address Hold Time t

20 10 - - - ns

Data Setup Time t

195 80 - - - ns

Data Hold Time t

10 10 - - - ns

(1)

The above specifications are indications only (based on Hitachi HD44780). Timing will vary from manufacturer

to manufacturer.

(2)

Power Supply : HD44780 S : V

= 4.5 - 5.5 V

HD44780 U : V

= 2.7 - 5.5 V

This data sheet refers to specifications for the Hitachi HD44780 LCD Driver chip, which is used for most LCD

modules.

Common types are : 1 line x 20 characters

2 lines x 16 characters

2 lines x 20 characters

2 lines x 40 characters

4 lines x 20 characters

4 lines x 40 characters

Peter Luethi, Switzerland http://www.electronic-engineering.ch

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Motorola M68CPU32BUG Manuel d'utilisateur Page 35

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