AMMCL002AWP datasheet(13/36 Pages) AMD

13 / 36 page

AmMCL00XA

PRELIMIN ARY

Table 5.

Word Command Definitions

Legend:

X = Don’t care

RA = Address of the memory location to be read.

RW = 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# pulse.

PW = Data to be programmed at location PA. Data is latched

on the rising edge of WE#.

SA = Address of the sector to be erased. Refer to Table 8 for

sector addresses.

Notes:

1. Write protect must not be enabled for proper operation of

all commands. No command required for reading array

data, and can thus be done with write protect enabled.

2. During word addressing, CEL# = 0, CEH# = 0, and

address is applied to Memory Device Pair 0 (S0 and S1).

On 4 Mbyte cards, address for Memory Device Pair 1 =

(Addr) + 200000h, and address is applied to Memory

Device Pair 1 (S2 and S3). For host-to-card address bit

connections, see Figure 2.

3. All values are in hexadecimal.

4. The last bus cycle in an autoselect command sequence is

a read operation.

5. Word = high byte + low byte.

6. Address bits = X = Don’t Care for all commands except for

Read Address (RA), Program Address (PA), and Sector

Address (SA).

7. The Erase Suspend command is valid only during a

sector erase operation. Refer to “Sector Erase Suspend”.

8. The Erase Resume command is valid only during the

Erase Suspend mode.

9. See Table 4 for bus operations.

Embedded Command

Sequence (Note 1)

Bus Cycles (Notes 2–9)

First

Second

Third

Fourth

Fifth

Sixth

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Read

Reset

XXXX

F0F0

Autoselect Manufacturer ID

(Note 4)

XXXX

AAAA

XXXX

5555

XXXX

9090

XX00

0101

Autoselect Device ID

(Note 4)

XXXX

AAAA

XXXX

5555

XXXX

9090

XX01

3838

Word Write

XXXX

AAAA

XXXX

5555

XXXX

A0A0

Device Erase

XXXX

AAAA

XXXX

5555

XXXX

8080

XXXX

AAAA

XXXX

5555

XXXX

1010

Sector Erase

XXXX

AAAA

XXXX

5555

XXXX

8080

XXXX

AAAA

XXXX

5555

3030

Sector Erase Suspend (Note 7)

XXXX

B0B0

Sector Erase Resume (Note 8)

XXXX

3030

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