AMMC008AWP datasheet(13/39 Pages) AMD

13 / 39 page

AmMC0XXA

PREL I M I N AR Y

Table 5.

Word Command Definitions for 2 Mbyte Cards

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 11 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).

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 A19–A11 = 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 read/write modes.

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

XXX

F0F0

Autoselect Manufacturer ID (Note 4)

555

AAAA

2AA

5555

555

9090

X00

0101

Autoselect Device ID (Note 4)

555

AAAA

2AA

5555

555

9090

X01

D5D5

Word Write

555

AAAA

2AA

5555

555

A0A0

Device Erase

555

AAAA

2AA

5555

555

8080

555

AAAA

2AA

5555

555

1010

Sector Erase

555

AAAA

2AA

5555

555

8080

555

AAAA

2AA

5555

3030

Sector Erase Suspend (Note 7)

XXX

B0B0

Sector Erase Resume (Note 8)

XXX

3030

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