M58CR064D データシートの表示（PDF） - STMicroelectronics

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コンポーネント説明

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M58CR064D

64 Mbit (4Mb x 16, Dual Bank, Burst) 1.8V Supply Flash Memory

STMicroelectronics 

M58CR064C, M58CR064D, M58CR064P, M58CR064Q

Synchronous Single Reads are used to read the

Electronic Signature, Status Register, CFI, Block

Protection Status, Configuration Register Status

or Protection Register. When the addressed bank

is in Read CFI, Read Status Register or Read

Electronic Signature mode, the WAIT signal is al-

ways deasserted.

See Table 21, Synchronous Read AC Character-

istics and Figure 13, Single Synchronous Read AC

Waveform for details.

DUAL OPERATIONS AND MULTIPLE BANK ARCHITECTURE

The Dual Operations feature simplifies the soft-

ware management of the device and allows code

to be executed from one bank while the other 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 the other 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 the

other bank in Read mode. Bus Read operations

are allowed in the other bank between setup and

confirm cycles of program or erase operations.

The combination of these features means that

read operations are possible at any moment.

Tables 11 and 12 show the dual operations possi-

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

complete list of possible commands refer to Ap-

pendix D, Command Interface State Tables.

Table 11. Dual Operations Allowed In Other Bank

Commands allowed in other bank

Status of bank

Read

Array

Read

Status

Register

Read

CFI

Query

Read

Electronic Program

Signature

Block

Erase

Idle

Yes

Yes

Yes

Yes

Yes

Yes

Programming

Yes

Yes

Yes

Yes

–

–

Erasing

Yes

Yes

Yes

Yes

–

–

Program Suspended

Yes

Yes

Yes

Yes

–

–

Erase Suspended

Yes

Yes

Yes

Yes

Yes

–

Program/ Program/

Erase

Erase

Suspend Resume

Yes

Yes

–

–

–

–

–

Yes

–

Yes

Table 12. Dual Operations Allowed In Same Bank

Commands allowed in same bank

Status of bank

Read

Array

Read

Status

Register

Read

CFI Query

Read

Electronic

Signature

Program

Block

Erase

Idle

Yes

Yes

Yes

Yes

Yes

Yes

Programming

–

Yes

–

–

–

–

Erasing

–

Yes

–

–

–

–

Program Suspended Yes(1)

Yes

Yes

Yes

–

–

Erase Suspended

Yes(1)

Yes

Yes

Yes

Yes(1)

–

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

Program/ Program/

Erase

Erase

Suspend Resume

Yes

Yes

Yes

–

Yes

–

–

Yes

–

Yes

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