5/4/98

AmC0XXCFLKA

9

Table 3.

Even Byte Command Definitions (Note 5)

* Address for Memory Segment 0 (S0) only. Address for the higher even memory segments (S2–S18) = (Addr) + (N/2)* 100000H

where N = Memory Segment number (0) for 1 Mbyte, N = (0, 2) for 2 Mbyte, N = (0, 2, 4, 6) for 4 Mbyte, N = (0…18) for 10 Mbyte.

Notes:

1. Address bit A16 = X = Don’t Care for all address commands except for Program Address (PA), Read Address (RA) 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 WE pulse.

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

To select the memory segment:1 and 2 Mbyte: Use CE1 and A20

4 Mbyte:

Use CE1 and A20, A21

10 Mbyte:

Use CE1 and A20–A23.

4. RD = Data read from location RA during read operation.

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

5. A0 = 0 and CE1 = 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

4

AAAAH AAH 5554H

55H AAAAH F0H

RA

RD

Autoselect

4

AAAAH AAH 5554H

55H AAAAH

90H

00H/02H 01H/A4H

Byte Write

4

AAAAH AAH 5554H

55H AAAAH A0H

PA

PD

Segment Erase

6

AAAAH AAH 5554H

55H AAAAH

80H

AAAAH

AAH

5554H

55H

AAAAH

10H

Sector Erase

6

AAAAH AAH 5554H

55H AAAAH

80H

AAAAH

AAH

5554H

55H

SA

30H

Sector Erase Suspend

Erase can be suspended during sector erase with Addr (don’t care), Data (B0H)

Sector Erase Resume

Erase can be resumed after suspend with Addr (don’t care), Data (30H)