12

AmC0XXDFLKA

Table 5.

Word Command Definitions (Notes 1–7)

Notes:

1. Address bits = X = Don’t Care for all address commands except for Program Address (PA) and Sector Address (SA).

2. Bus operations are defined in Table 1.

3. RA = Address of the memory location to be read.

PA = Address of the memory location to be programmed. Addresses are latched on the falling edge of the WEpulse.

SA = Address of the sector to be erased. The combination of A17, A18, A19, A20, A21will uniquely select any sector of a

segment.

To select the memory segment:

4 Mbyte:

Use CE1, CE2

8 Mbyte:

Use CE1, CE2

20 and 32 Mbyte:

Use CE1, CE2, A22–A24.

4. RW = Data read from location RA during read operation. (Word Mode).

PW = Data to be programmed at location PA. Data is latched on the rising edge of WE. (Word Mode).

5. Address for Memory Segment Pair 0 (S0 and S1) only. Address for the higher Memory Segment Pairs (S2, S3 = Pair 1; S4,

S5 = Pair 2; S6, S7 = Pair 3…) is equal to (Addr) + M* (40000H) where M = Memory Segment Pair number.

6. Word = 2 bytes = odd byte and even byte.

7. CE1 = 0 and CE2 = 0.

Embedded

Command

Sequence

Bus

Write

Cycles

Req’d

First Bus

Write Cycle

Second Bus

Write Cycle

Third Bus

Write Cycle

Fourth Bus

Read/Write Cycle

Fifth Bus

Write Cycle

Sixth Bus

Write Cycle

Addr*

Data

Addr*

Data

Addr*

Data

Addr*

Data

Addr*

Data

Addr*

Data

Reset/Read

1

XXXXH F0F0

Reset/Read

4

XXXXH AAAA XXXXH 5555 XXXXH

F0

RA

RW

Autoselect

4

XXXXH AAAA XXXXH 5555 XXXXH

90

00H

0101

02H

3D3D

Byte Write

4

XXXXH AAAA XXXXH 5555 XXXXH A0A0

PA

PW

Segment

Erase

6

XXXXH AAAA XXXXH 5555 XXXXH 8080

XXXXH

AAAA

5554H 5555 XXXXH 1010

Sector Erase

6

XXXXH AAAA XXXXH 5555 XXXXH 8080

XXXXH

AAAA

5554H 5555

SA

3030

Sector Erase Suspend

XXXXH B0B0 Erase can be suspended during sector erase with Addr (don’t care), Data (B0B0H)

Sector Erase Resume

XXXXH

3030 Erase can be resumed after suspend with Addr (don’t care), Data (3030H)