M58WR032FT datasheet(33/86 Pages) STMICROELECTRONICS

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M58WR032FT, M58WR032FB

DUAL OPERATIONS AND MULTIPLE BANK ARCHITECTURE

The

Multiple

Bank

Architecture

the

M58WR032FT/B provides flexibility for software

developers by allowing code and data to be split

with 4Mbit granularity. The Dual Operations fea-

ture simplifies the software management of the de-

vice and allows code to be executed from one

bank while another bank is being programmed or

erased.

The Dual operations feature means that while pro-

gramming or erasing in one bank, Read opera-

tions are possible in another bank with zero

latency (only one bank at a time is allowed to be in

Program or Erase mode). If a Read operation is re-

quired in a bank which is programming or erasing,

the Program or Erase operation can be suspend-

ed. Also if the suspended operation was Erase

then a Program command can be issued to anoth-

er block, so the device can have one block in

Erase Suspend mode, one programming and oth-

er banks in Read mode. Bus Read operations are

allowed in another bank between setup and con-

firm cycles of program or erase operations. The

combination of these features means that read op-

erations are possible at any moment.

Tables 11 and 12 show the dual operations possi-

ble in other banks and in the same bank. For a

complete list of possible commands refer to AP-

PENDIX D., COMMAND INTERFACE STATE TA-

BLES.

Table 11. Dual Operations Allowed In Other Banks

Table 12. Dual Operations Allowed In Same Bank

Note: 1. Not allowed in the Block or Word that is being erased or programmed.

2. The Read Array command is accepted but the data output is not guaranteed until the Program or Erase has completed.

Status of bank

Commands allowed in another bank

Read

Array

Read

Status

Read

CFI

Query

Read

Electronic

Signature

Program

Block

Erase

Program/

Erase

Suspend

Program/

Erase

Resume

Idle

Yes

Programming

Yes

–

Yes

–

Erasing

Yes

–

Yes

–

Program Suspended

Yes

–

Yes

Erase Suspended

Yes

–

Yes

Status of bank

Commands allowed in same bank

Read

Array

Read

Status

Read

CFI Query

Read

Electronic

Signature

Program

Block

Erase

Program/

Erase

Suspend

Program/

Erase

Resume

Idle

Yes

Programming

–(2)

Yes

–

Yes

–

Erasing

–(2)

Yes

–

Yes

–

Program Suspended

Yes(1)

Yes

–

Yes

Erase Suspended

Yes(1)

Yes

Yes(1)

––

Yes

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