AM29BDS643D datasheet(21/46 Pages) AMD

部件名	AM29BDS643D

功能描述	64 Megabit (4 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory

PDF	46 Pages

Scroll/Zoom	100%

制造商	AMD [Advanced Micro Devices]

网页	http://www.amd.com

标志

21 / 46 page

Am29BDS643D

PRELI M INARY

After an erase-suspended program operation is com-

plete, the bank returns to the erase-suspend-read

mode. The system can determine the status of the

program operation using the DQ7 or DQ6 status bits,

just as in the standard program operation. Refer to the

Write Operation Status section for more information.

In the erase-suspend-read mode, the system can also

issue the autoselect command sequence. Refer to the

Autoselect Functions and Autoselect Command

Sequence sections for details.

To resume the sector erase operation, the system must

write the Erase Resume command. The bank address

of the erase-suspended bank is required when writing

this command. Further writes of the Resume command

are ignored. Another Erase Suspend command can be

written after the chip has resumed erasing.

Figure 2.

Erase Operation

START

Write Erase

Command Sequence

Data Poll

from System

Data = FFh?

Yes

Erasure Completed

Embedded

Erase

algorithm

in progress

Notes:

1. See Table 4 for erase command sequence.

2. See the section on DQ3 for information on the sector

erase timer.

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