AM29F200BB-120 データシートの表示（PDF） - Advanced Micro Devices

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AM29F200BB-120

2 Megabit (256 K x 8-Bit/128 K x 16-Bit) CMOS 5.0 Volt-only, Boot Sector Flash Memory

Advanced Micro Devices 

The system may also write the autoselect command

sequence when the device is in the Erase Suspend

mode. The device allows reading autoselect codes

even at addresses within erasing sectors, since the

codes are not stored in the memory array. When the

device exits the autoselect mode, the device reverts to

the Erase Suspend mode, and is ready for another

valid operation. See “Autoselect Command Sequence”

for more information.

The system must write the Erase Resume command

(address bits are “don’t care”) to exit the erase suspend

mode and continue the sector erase operation. Further

writes of the Resume command are ignored. Another

Erase Suspend command can be written after the

device has resumed erasing.

START

Write Erase

Command Sequence

Data Poll

from System

No

Data = FFh?

Embedded

Erase

algorithm

in progress

Yes

Erasure Completed

Notes:

1. See the appropriate Command Definitions table for erase

command sequence.

2. See “DQ3: Sector Erase Timer” for more information.

Figure 3. Erase Operation

16

Am29F200B

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