w49v002a Winbond Electronics Corp America, w49v002a Datasheet - Page 6

• Manufacturer Part Number: w49v002a
• Description: 256k X 8 Cmos Flash Memory With Lpc Interface
• Manufacturer: Winbond Electronics Corp America

TABLE OF OPERATING MODES
Operating Mode Selection - Programmer Mode
(V
Operating Mode Selection - LPC Mode
Operation modes in LPC interface mode are determined by "cycle type" when it is selected. When it is
not selected, its outputs (LAD[3:0]) will be disable. Please reference to the "Standard LPC Memory
Cycle Definition".
TABLE OF COMMAND DEFINITION
Note: 1. The cycle means the write command cycle not the LPC clock cycle.
Read
Write
Standby
Write Inhibit
Output Disable
Read
Chip Erase
Sector Erase
Byte Program
Boot Block Lockout
Product ID Entry
Product ID Exit
Product ID Exit
HH
= 12V 5 )
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
DESCRIPTION
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
MODE
(1)
(1)
NO. OF
Cycles
1
6
6
4
6
3
3
1
#OE
VIH
VIH
VIL
VIL
X
X
1ST CYCLE
Addr. Data
A
5555 AA
5555 AA
5555 AA
5555 AA
5555 AA
5555 AA
XXXX F0
IN
D
#WE
VIH
VIH
VIL
OUT
X
X
X
2ND CYCLE 3RD CYCLE
Addr. Data
2AAA 55
2AAA 55
2AAA 55
2AAA 55
2AAA 55
2AAA 55
#RESET
VIH
VIH
VIH
VIH
VIH
VIL
- 6 -
Addr. Data
5555 A0
5555 80
5555 80
5555 80
5555 90
5555 F0
AIN
AIN
X
X
X
X
Preliminary W49V002A
ADDRESS
PINS
4TH CYCLE
Addr. Data
5555 AA
5555 AA
5555 AA
A
IN
D
IN
5TH CYCLE
Addr. Data
2AAA 55
2AAA 55
2AAA 55
Dout
Din
High Z
High Z/DOUT
High Z/DOUT
High Z
DQ.
6TH CYCLE
Addr. Data
5555 10
SA
5555 40
30