AM29LVI16D datasheet(22/44 Pages) AMD

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Am29LV116D

Command Definitions

Table 9.

Am29LV116D Command Definitions

Legend:

X = Don’t care

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 or verified. Address

bits A20–A13 uniquely select any sector.

Notes:

1. See Table 1 for descriptions of bus operations.

2. All values are in hexadecimal.

3. Except when reading array or autoselect data, all bus

cycles are write operations.

4. Address bits A20–A11 are don’t care for unlock and

command cycles, except when PA or SA is required.

5. No unlock or command cycles required when device is in

read mode.

6. The Reset command is required to return to the read

mode when the device is in the autoselect mode or if DQ5

goes high.

7. The fourth cycle of the autoselect command sequence is

a read cycle.

8. The data is 00h for an unprotected sector and 01h for a

protected sector.

9. Command is valid when device is ready to read array data

or when device is in autoselect mode.

10. The Unlock Bypass command is required prior to the

Unlock Bypass Program command.

11. The Unlock Bypass Reset command is required to return

to reading array data when the device is in the Unlock

Bypass mode.

12. The system may read and program functions in non-

erasing sectors, or enter the autoselect mode, when in the

Erase Suspend mode. The Erase Suspend command is

valid only during a sector erase operation.

13. The Erase Resume command is valid only during the

Erase Suspend mode.

Command Sequence

(Note 1)

Bus Cycles (Notes 2–4)

First

Second

Third

Fourth

Fifth

Sixth

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Read (Note 5)

Reset (Note 6)

XXX

Manufacturer ID

555

2AA

555

X00

Device ID,

Top Boot Block

555

2AA

555

X01

Device ID,

Bottom Boot Block

Sector Protect

Verify (Note 8)

555

2AA

555

X02

CFI Query (Note 9)

Byte Program

555

2AA

555

Unlock Bypass

555

2AA

555

Unlock Bypass Program

(Note 10)

XXX

Unlock Bypass Reset

(Note 11)

XXX

Chip Erase

555

2AA

555

2AA

555

Sector Erase

555

2AA

555

2AA

Erase Suspend (Note 12)

XXX

Erase Resume (Note 13)

XXX

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