W78E54 datasheet(12/23 Pages) WINBOND

12 / 23 page

W78E54

- 12 -

Program Operation

This operation is used to program data to the flash EEPROM and the option bits. Programming is

initiated when VPP reaches VCP (12.5V) level, CE is set to low, and OE is set to high.

Program Verify Operation

All data must be checked after programming. This operation should be performed after each byte is

programmed, and it will ensure a substantial program margin.

OPERATION

P3.0

(A9

CTRL)

P3.1

(A13

CTRL)

P3.2

(A14

CTRL)

P3.3

(OE

CTRL)

P3.6

( CE )

P3.7

( OE )

(VPP)

P2, P1

(A15 TO A0)

(D7 TO D0)

NOTES

Read

VIL

VIH

Address

Data Out

1, 2

Program

VIL

VIH

VCP

Address

Data In

1, 2

Program Verify

VIL

VIH

VIL

VCP

Address

Data Out

Notes:

1. During all of these operations, RST = VIH, ALE = VIL, and PSEN = VIH.

2. VCP = 12V, VIH = VDD, VIL = Vss.

3. The program verify operation should follow the programming operaion.

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

MIN.

MAX.

UNIT

DC Power Supply

VDD

−VSS

-0.3

+7.0

Input Voltage

VIN

VSS -0.3

VDD +0.3

Operating Temperature

°C

Storage Temperature

TST

-55

+150

°C

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability

the device.

P3.0

P3.1

P3.2

P3.3

P3.6

P3.7

X'tal1

X'tal2

EA/Vpp

ALE

RST

PSEN

Vss

A0 to A7

V CP

V IL

V IH

V IL

VIL

A8 to A15

PGM DATA

V IH

+5V

Programming Configuration

Programming Verification

V DD

P3.0

P3.1

P3.2

P3.3

P3.6

P3.7

X'tal1

X'tal2

EA/Vpp

ALE

RST

PSEN

Vss

A0 to A7

V CP

V IL

V IH

V IL

A8 to A15

PGM DATA

V IH

+5V

V DD

W78E54 Datasheet(PDF) 12 Page - Winbond

W78E54 Datasheet(HTML) 12 Page - Winbond

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Datasheet Download

Link URL