7

AC Timing Characteristics Over Temperature Range (-40

Timing

Diagram

Ref.

Number

Description

Symbol

Min.

Max.

Min.

Max.

Units

1

Register Select Setup Time to

10

10

ns

Chip Enable

2

Register Select Hold Time to

10

10

ns

Chip Enable

3

Rising Clock Edge to Falling

20

20

ns

Chip Enable Edge

4

Chip Enable Setup Time to

35

55

ns

Rising Clock Edge

5

Chip Enable Hold Time to

20

20

ns

Rising Clock Edge

6

Data Setup Time to Rising

10

10

ns

Clock Edge

7

Data Hold Time after Rising

10

10

ns

Clock Edge

8

10

40

10

65

ns

9

18

30

ns

Simultaneous Mode for

10

25

45

ns

11

Clock High Time

80

100

ns

12

Clock Low Time

80

100

ns

Reset Low Time

50

50

ns

Clock Frequency

54

MHz

Internal Display Oscillator

80

210

80

210

KHz

Frequency

Internal Refresh Frequency

150

410

150

400

Hz

External Display Oscillator

Frequency

Prescaler = 1

51.2

1000

51.2

1000

KHz

Prescaler = 8

410

8000

410

8000

KHz

Notes:

1. Timing specifications increase 0.3 ns per pf of capacitive loading above 15 pF.

2. This parameter is valid for Simultaneous Mode data entry of the Control Register.