A29010B datasheet(10/30 Pages) AMICC

10 / 30 page

A29010B Series

PRELIMINARY

(June, 2016, Version 0.0)

AMIC Technology, Corp.

START

Write Erase

Command

Sequence

Data Poll

from System

Data = FFh ?

Erasure Completed

Yes

Embedded

Erase

algorithm in

progress

Note :

1. See the appropriate Command Definitions table for erase

command sequences.

2. See "I/O3 : Sector Erase Timer" for more information.

Figure 2. Erase Operation

Erase Suspend/Erase Resume Commands

The Erase Suspend command allows the system to interrupt a

sector erase operation and then read data from, or program

data to, any sector not selected for erasure. This command is

valid only during the sector erase operation, including the

μs time-out period during the sector erase command

sequence. The Erase Suspend command is ignored if written

during the chip erase operation or Embedded Program

algorithm. Writing the Erase Suspend command during the

Sector Erase time-out immediately terminates the time-out

period and suspends the erase operation. Addresses are

"don't cares" when writing the Erase Suspend command.

When the Erase Suspend command is written during a sector

erase operation, the device requires a maximum of 20

μs to

suspend the erase operation. However, when the Erase

Suspend command is written during the sector erase time-out,

the device immediately terminates the time-out period and

suspends the erase operation.

After the erase operation has been suspended, the system

can read array data from or program data to any sector not

selected for erasure. (The device "erase suspends" all sectors

selected for erasure.) Normal read and write timings and

command definitions apply. Reading at any address within

erase-suspended sectors produces status data on I/O7 - I/O0.

The system can use I/O7, or I/O6 and I/O2 together, to

determine if a sector is actively erasing or is erase-

suspended. See "Write Operation Status" for information on

these status bits.

After an erase-suspended program operation is complete, the

system can once again read array data within non-suspended

sectors. The system can determine the status of the program

operation using the I/O7 or I/O6 status bits, just as in the

standard program operation. See "Write Operation Status" for

more information.

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.

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