10

AmC0XXCFLKA

5/4/98

Table 4.

Odd Byte Command Definitions (Note 5)

*Address for Memory Segment 1 (S1) only. Address for the higher odd memory segments (S3–S19) = (Addr) + ((N–1)/2)*

100000H + 80000H where N = Memory Segment number (1) for 1 Mbyte, N = (1, 3) for 2 Mbyte, N = (1, 3, 5, 7) for 4 Mbyte,

N = (1…19) 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 CE2 and A20

4 Mbyte:

Use CE2 and A20, A21

10 Mbyte:

Use CE2 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 = 1 and CE1 = 0 or A0 = X 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

4

AAABH AAH 5555H

55H AAABH F0H

RA

RD

Autoselect

4

AAABH AAH 5555H

55H AAABH

90H

00H/02H 01H/A4H

Byte Write

4

AAABH AAH 5555H

55H AAABH A0H

PA

PD

Segment Erase

6

AAABH AAH 5555H

55H AAABH

80H

AAABH

AAH

5555H

55H

AAABH

10H

Sector Erase

6

AAABH AAH 5555H

55H AAABH

80H

AAABH

AAH

5555H

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)