w49v002fa Winbond Electronics Corp America, w49v002fa Datasheet - Page 6

• Manufacturer Part Number: w49v002fa
• Description: 256k X 8 Cmos Flash Memory With Fwh Interface
• Manufacturer: Winbond Electronics Corp America

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
Notes:
Read
Chip Erase
Sector Erase
Byte Program
Boot Block Lockout
Product ID Entry
Product ID Exit
Product ID Exit
DESCRIPTION
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
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
COMMAND
A[10:0] are mapped to the internal A[10:0], Row Address A[6:0] are mapped to the internal A[17:11]
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
(1)
(1)
NO. OF
Cycles
1
6
6
4
6
3
3
1
1ST CYCLE
Addr. Data
A
5555 AA
5555 AA
5555 AA
5555 AA
5555 AA
5555 AA
XXXX F0
IN
D
OUT
2ND CYCLE
Addr. Data
2AAA 55
2AAA 55
2AAA 55
2AAA 55
2AAA 55
2AAA 55
- 6 -
3RD CYCLE
Addr. Data
5555 A0
5555 F0
5555 80
5555 80
5555 80
5555 90
4TH CYCLE
Addr. Data
5555 AA
5555 AA
A
5555 AA
IN
D
IN
5TH CYCLE
W49V002FA
Addr. Data
2AAA 55
2AAA 55
2AAA 55
6TH CYCLE
Addr. Data
5555 10
SA
5555 40
30