AM29F004B datasheet(30/37 Pages) AMD

部件名	AM29F004B

功能描述	4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory

PDF	37 Pages

Scroll/Zoom	100%

制造商	AMD [Advanced Micro Devices]

网页	http://www.amd.com

标志

30 / 37 page

Am29F004B

8/5/05

AD VA NC E

IN FO RM AT ION

AC CHARACTERISTICS

Figure 16.

Sector Unlock Sequence Timing Diagram

Figure 17.

Sector Relock Timing Diagram

Parameter

All Speed Options

JEDEC

Std.

Description

Unit

tVIDR

VID Rise and Fall Time (Not 100% tested)

Min

500

OE#

A18 – A0

D7 – D0

CE#

WE#

AAh

555h

55h

2AAh

20h/24h

555h

tVIDR

If 20h is written, Sector Unprotect mode

is enabled. If 24h is written, command mode

Sector Protect/Unprotect is enabled.

Device is ready to read from array.

VID

VSS, VIL

or VIH

OE#

A18 – A0

D7 – D0

CE#

WE#

90h

XXXh

F0h or 00h

XXXh

tVIDR

VID

VSS, VIL

or VIH

tVIDR

0 V or 5 V

Device exits Temporary Sector Unprotect mode

or command mode Sector Protect/Unprotect.

Returns to reading array data.

Device is in either Temporary Sector Unprotect

mode or command mode Sector Protect/Unprotect.

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