W49V002FA

- 6 -

Operating Mode Selection - FWH Mode

Operation modes in FWH interface mode are determined by "START Cycle" when it is selected. When

it is not selected, its outputs (FWH[3:0]) will be disable. Please reference to the "FWH Cycle

Definition".

TABLE OF COMMAND DEFINITION

COMMAND

NO. OF

1ST CYCLE

2ND CYCLE

3RD CYCLE

4TH CYCLE

5TH CYCLE

6TH CYCLE

DESCRIPTION

Cycles

Addr. Data

Addr. Data

Addr. Data

Addr. Data

Addr. Data

Addr. Data

Read

1

Chip Erase

6

5555 AA

2AAA 55

5555 80

5555 AA

2AAA 55

5555 10

Sector Erase

6

5555 AA

2AAA 55

5555 80

5555 AA

2AAA 55

SA

30

Byte Program

4

5555 AA

2AAA 55

5555 A0

Boot Block Lockout

6

5555 AA

2AAA 55

5555 80

5555 AA

2AAA 55

5555 40

Product ID Entry

3

5555 AA

2AAA 55

5555 90

Product ID Exit

(1)

3

5555 AA

2AAA 55

5555 F0

Product ID Exit

(1)

1

XXXX F0

Notes:

1. The cycle means the write command cycle not the FWH clock cycle.

2. The Column Address / Row Address are mapped to the Low / High order Internal Address. i.e. Column Address

A[10:0] are mapped to the internal A[10:0], Row Address A[6:0] are mapped to the internal A[17:11]

3. Address Format: A14

−A0 (Hex); Data Format: DQ7-DQ0 (Hex)

4. Either one of the two Product ID Exit commands can be used.

5. SA: Sector Address

SA = 3C000h to 3FFFFh for Boot Block

SA = 3A000h to 3BFFFh for Parameter Block1

SA = 38000h to 39FFFh for Parameter Block2

SA = 30000h to 37FFFh for Main Memory Block1

SA = 2XXXXh for Main Memory Block2

SA = 1XXXXh for Main Memory Block3

SA = 0XXXXh for Main Memory Block4