UPSD3312D datasheet(184/272 Pages) STMICROELECTRONICS

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Doc ID 9685 Rev 7

Table 117.

Flash memory instruction sequences(1)(2)(3)

Instr.

sequence

Bus

cycle 1

Bus

cycle 2

Bus

cycle 3

Bus

cycle 4

Bus

cycle 5

Bus

cycle 6

Bus

cycle 7

Link

Read

Memory

Contents

(Read Array

mode)

Read byte

from any

valid Flash

memory

addr

Section 2

7.4.4

Program

(write) a

Byte to

Flash

memory

Write AAh

to X555h

(unlock)

Write 55h

to XAAAh

(unlock)

Write A0h

to X555h

(command)

Write data

byte to

address

Section 2

7.4.9

Bypass

Unlock

Write AAh

to X555h

(unlock)

Write 55h

to XAAAh

(unlock)

Write 20h

to X555h

(command)

Section 2

7.4.13

Program a

Byte to

Flash

memory with

Bypassed

Unlock

Write A0h

to XXXXh

(command)

Write data

byte to

address

Section 2

7.4.13

Reset

Bypass

Unlock

Write 90h

to XXXXh

(command)

Write 00h

to XXXXh

(command)

Section 2

7.4.13

Flash Bulk

Erase(3)

Write AAh

to X555h

(unlock)

Write 55h

to XAAAh

(unlock)

Write 80h

to X555h

(command)

Write AAh

to X555h

(unlock)

Write 55h

to XAAAh

(unlock)

Write 10h

to X555h

(command)

Section 2

7.4.15

Flash Sector

Erase

Write AAh

to X555h

(unlock)

Write 55h

to XAAAh

(unlock)

Write 80h

to X555h

(command)

Write AAh

to X555h

(unlock)

Write 55h

to XAAAh

(unlock)

Write 30h

to desired

Sector

(command)

Write 30h

to another

Sector

(command)

Section 2

7.4.16

Suspend

Sector

Erase

Write B0h

to address

that

activates

FSx or

CSBOOTx

where

erase is in

progress

(command)

Section 2

7.4.17

All values are in hexadecimal, X = Don’t care

8032 addresses A12 through A15 are “Don’t care” during the instruction sequence decoding. Only address bits A0-A11 are

used during decoding of Flash memory instruction sequences. The individual sector select signal (FS0 - FS7 or CSBOOT0-

CSBOOT3) which is active during the instruction sequence determines the complete address.

Directing this command to any individual sector within a Flash memory array will invoke the bulk erase of all Flash memory

sectors within that array.

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