Displays

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085

Tel: 408-523-8200 • Fax: 408-733-1287 • sales@purdyelectronics.com •

www.purdyelectronics.com

6/20/11

5

Symbol

Characteristics

Test Condition

Specifications

Units

Min.

Typ.

Max.

Internal Clock Operation

f

OSC

ff

OSC Frequency

R = 75KΩ

190

270

350

KHz

External Clock Operation

f

EX

External Frequency

–

125

270

410

KHz

Duty Cycle

–

45

50

55

%

T

Rise/Fall Time

–

–

–

0.2

μ

s

Write Mode (Writing data from MPU to ST7066U)

T

C

Enable Cycle Time

Pin E

1200

–

–

ns

T

PW

Enable Plus Time

Pin E

460

–

–

ns

T

Enable Rise/Fall Time

Pin E

–

–

25

ns

T

AS

TT

Address Setup Time

Pins RS, RW, E

0

–

–

ns

T

AH

TT

Address Hold Time

Pins RS, RW, E

10

–

–

ns

T

DSW

Data Setup Time

Pins: DB0 - DB7

80

–

–

ns

T

H

Data Hold Time

Pins: DB0 - DB7

10

–

–

ns

Read Mode (Reading Data from ST7066U to MPU)

T

C

Enable Cycle Time

Pin E

1200

–

–

ns

T

PW

Enable Pulse Width

Pin E

480

–

–

ns

T

Enable Rise/Fall Time

Pin E

–

–

25

ns

T

AS

TT

Address Setup Time

Pins: RS, RW, E

0

–

–

ns

T

AH

TT

Address Hold Time

Pins: RS, RW, E

10

–

–

ns

T

DOR

Data Setup Time

Pins: DB0 - DB&

–

–

320

ns

T

H

Data Hold Time

Pins: DB0 - DB7

10

–

–

ns