16

Am29F080B

P R E L I M I NARY

Table 5.

Am29F080B Command Definitions

Legend:

RA = Address of the memory location to be read.

RD = Data read from location RA during read operation.

PA = Address of the memory location to be programmed. Addresses are latched on the falling edge of the WE# or CE# pulse.

PD = Data to be programmed at location PA. Data is latched on the rising edge of WE# or CE# pulse.

SA = Address of the sector to be erased. Address bits A19–A16 uniquely select any sector.

SGA = Address of the sector group to be verified.

Notes:

1. All values are in hexadecimal.

2. See Table 1 for descriptions of bus operations.

3. No unlock or command cycles required when device is in read mode.

4. The Reset command is required to return to the read mode when the device is in the autoselect mode or if DQ5 goes high.

5. The data is 00h for an unprotected sector group and 01h for a protected sector group. The complete bus address in the fourth

cycle is composed of the sector group address (A19–A17), A1 = 1, and A0 = 0.

6. Read and program functions in non-erasing sectors are allowed in the Erase Suspend mode. The Erase Suspend command

is valid only during a sector erase operation.

7. The Erase Resume command is valid only during the Erase Suspend mode.

8. Unless otherwise noted, address bits A19–A11 are don’t care.

Command

Sequence

(Note 1)

Bus Cycles (Notes 2–5)

First

Second

Third

Fourth

Fifth

Sixth

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Read (Note 3)

1

RA

RD

Reset (Note 4)

1

XXX

F0

Autoselect

Manufacturer ID

4

555

AA

2AA

55

555

90

X00

01

Autoselect

Device ID

4

555

AA

2AA

55

555

90

X01

D5

Autoselect

Sector Group

Protect Verify

(Note 5)

4

555

AA

2AA

55

555

90

SGA

X02

00

01

Byte Program

4

555

AA

2AA

55

555

A0

PA

PD

Chip Erase

6

555

AA

2AA

55

555

80

555

AA

2AA

55

555

10

Sector Erase

6

555

AA

2AA

55

555

80

555

AA

2AA

55

SA

30

Erase Suspend

(Note 6)

1

XXX

B0

Erase Resume

(Note 7)

1

XXX

30