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1

Bus operations defined in "Mode definitions," on page 3.

2

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

3

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

4

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

5

Address bit A17 = X = Don’t care for all address commands except Program Address and Sector Address.

6

Address bit A18 = X = Don’t care for all address commands except Program Address and Sector Address.

Sector

Equal sector architecture

ID sector address

Addresses

Size (Kbytes)

A18

A17

A16

0

00000h–0FFFFh

64

0

0

0

1

10000h–1FFFFh

64

0

0

1

2

20000h–2FFFFh

64

0

1

0

3

30000h–3FFFFh

64

0

1

1

4

40000h–4FFFFh

64

1

0

0

5

50000h–5FFFFh

64

1

0

1

6

60000h–6FFFFh

64

1

1

0

7

70000h–7FFFFh

64

1

1

1

Mode

A18–A16

A9

A8–A7

A6

A5–A2

A1

A0

Code on DQ0–DQ7

MFG code (Alliance

Semiconductor)

XL

X

L

L

52h

Device code

X

XL

X

L

H

A4h

Sector protection

Sector

address

Sector

address

L

Sector

address

HL

01h protected

00h unprotected

Command

sequence

Required

bus cycles

1st bus write

cycle

2nd bus write

cycle

3rd bus write

cycle

4th bus read/write

cycle

5th bus write

cycle

6th bus write

cycle

Address

Data

Address

Data

Address

Data

Address

Data

Address

Data

Address

Data

Reset/read

1

XXXXh

F0h

Read

Address

Read

Data

Reset/read

4

5555h

AAh

2AAAh

55h

5555h

F0h

Read

Address

Read

Data

Autoselect ID

read

4

5555h

AAh

2AAAh

55h

5555h

90h

00h

MFR code

52h

01h

Device code

A4h

XXX02h

Sector

protection

01 = protected

00 = unprotected

Program

4

5555h

AAh

2AAAh

55h

5555h

A0h

Program

Address

Program

Data

Chip erase

6

5555h

AAh

2AAAh

55h

5555h

80h

5555h

AAh

2AAAh

55h

5555h

10h

Sector erase

6

5555h

AAh

2AAAh

55h

5555h

80h

5555h

AAh

2AAAh

55h

Sector

Address

30h

Sector erase

suspend

1

XXXXh

B0h

Sector erase

resume

1

XXXXh

30h