E28F008BV-B70 データシートの表示（PDF） - Intel

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E28F008BV-B70

8-MBIT SmartVoltage BOOT BLOCK FLASH MEMORY FAMILY

Intel 

E

8-MBIT SmartVoltage BOOT BLOCK FLASH MEMORY FAMILY

Start

Write 40H,

Word/Byte Address

Write Word/Byte

Data/Address

Read

Status Register

NO

SR.7 = 1

?

YES

Full Status

Check if Desired

Word/Byte Program

Complete

Bus

Operation

Write

Write

Read

Command

Comments

Setup

Program

Data = 40H

Addr = Word/Byte to Program

Program

Data = Data to Program

Addr = Location to Program

Status Register Data Toggle CE#

or OE# to Update SRD

Standby

Check SR.7

1 = WSM Ready

0 = WSM Busy

Repeat for subsequent word/byte program operations.

SR Full Status Check can be done after each word/byte program,

or after a sequence of word/byte programs.

Write FFH after the last program operation to reset device to

read array mode.

FULL STATUS CHECK PROCEDURE

Read Status Register

Data (See Above)

1

SR.3 =

0

1

SR.4 =

0

Word/Byte Program

Successful

VPP Range Error

Word/Byte Program

Error

Bus

Operation

Command

Comments

Standby

Check SR.3

1 = VPP Low Detect

Standby

Check SR.4

1 = Word/Byte Program Error

SR.3 MUST be cleared, if set during a program attempt, before further

attempts are allowed by the Write State Machine.

SR.4 is only cleared by the Clear Status Register Command, in cases

where multiple bytes are programmed before full status is checked.

If error is detected, clear the Status Register before attempting retry or

other error recovery.

0539_06

Figure 6. Automated Word/Byte Programming Flowchart

SEE NEW DESIGN RECOMMENDATIONS

23

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