AS29F200B-120TI 参数 Datasheet PDF下载

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Sector erase timer

(DQ3)

Checks whether sector erase timer window is open. If DQ3 = 1, erase is in progress; no commands

will be accepted. If DQ3 = 0, the device will accept sector erase commands. Check DQ3 before and

after each sector erase command to verify that the command was accepted.

During sector erase, DQ2 toggles with OE or CE only during an attempt to read a sector being

erased. During chip erase, DQ2 toggles with OE or CE for all addresses. If DQ5 = 1, DQ2 toggles

only at sector addresses where failure occurred, and will not toggle at other sector addresses. Use

DQ2 in conjunction with DQ6 to determine whether device is in auto erase or erase suspend

mode.

Toggle bit 2 (DQ2)

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Required 1st bus write cycle

bus cycles Address Data Address

1

×16

Reset/Read

×8

×16

×8

Autoselect

ID Read

4

×16/×8

×16

×8

×16

Program

×8

×16

Chip Erase

×8

6

AAAAh

5555h

6

×8

Sector Erase Suspend

Sector Erase Resume

1

2

3

4

5

6

1

1

AAAAh

XXXXh

XXXXh

B0h

30h

AAh

5555h

×16

Sector Erase

4

AAAAh

5555h

AAh

5555h

2AAAh

55h

AAAAh

5555h

AAh

5555h

2AAAh

55h

AAAAh

5555h

80h

AAAAh

2AAAh

55h

AAAAh

5555h

80h

AAAAh

5555h

AAh

5555h

5555h

A0h

4

AAAAh

5555h

AAAAh

AAh

XXXXh

5555h

AAh

5555h

2AAAh

5555h

55h

F0h

Read

Address

2AAAh

55h

AAAAh

5555h

AAAAh

90h

2nd bus

write cycle

Data

Read Data

3rd bus

write cycle

Address

Data

4th bus

read/write cycle

Address

Data

5th bus

write cycle

Address

Data

6th bus

write cycle

Address

Data

Command sequence

Reset/Read

5555h

F0h

Read

Address

01h

02h

00h

MFR code

XXX02h

XXX04h

Program

Address

5555h

Read

Data

2251h (T)

2257h (B)

51h (T)

57h (B)

52h

01 = protected

00 = unprotected

Program

Data

2AAAh

AAh

5555h

2AAAh

55h

55h

AAAAh

Sector

Address

30h

5555h

10h

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Bus operations defined in "Mode definitions," on page 4.

Reading data from or programming data to non-erasing sectors allowed in Erase Suspend mode.

Address bit A15 = X = Don’t care for all address commands except Program Address and Sector Address.

Address bit A16 = X = Don’t care for all address commands except Program Address and Sector Address.

System should generate address patterns: ×16 mode - 5555h or 2AAAh to address A0–A14; ×8 mode - AAAAh or 5555h to address A-1–A14.

A

0

= 0, A

1

= 1, A

6

= 0 for sector protect verify; sector selected on A16-A12.

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