W49F020 Datasheet, PDF (5/21 Pages) Winbond – 256K X 8 CMOS FLASH MEMORY

Preliminary W49F020
TABLE OF OPERATING MODES
Operating Mode Selection
(VHH = 12V ± 5%)
MODE
Read
Write
Standby
Write Inhibit
CE OE
VIL VIL
VIL VIH
VIH X
X VIL
XX
Output Disable
Product ID
X VIH
VIL VIL
VIL VIL
PINS
WE
VIH AIN
VIL AIN
XX
ADDRESS
XX
VIH X
XX
VIH A0 = VIL; A1−A17 = VIL;
A9 = VHH
VIH A0 = VIL; A1−A17 = VIL;
A9 = VHH
DQ.
Dout
Din
High Z
High Z/DOUT
High Z/DOUT
High Z
Manufacturer Code DA (Hex)
Device Code 8C (Hex)
TABLE OF COMMAND DEFINITION
COMMAND
NO. OF 1ST CYCLE 2ND CYCLE 3RD CYCLE 4TH CYCLE 5TH CYCLE 6TH CYCLE
DESCRIPTION
Read
Chip Erase
Byte Program
Boot Block Lockout
Product ID Entry
Product ID Exit ⁽¹⁾
Product ID Exit ⁽¹⁾
Cycles
1
6
4
6
3
3
1
Addr. Data
AIN DOUT
5555 AA
5555 AA
5555 AA
5555 AA
5555 AA
XXXX F0
Addr. Data
2AAA 55
2AAA 55
2AAA 55
2AAA 55
2AAA 55
Addr. Data
5555 80
5555 A0
5555 80
5555 90
5555 F0
Addr. Data
5555 AA
A_IN D_IN
5555 AA
Addr. Data
2AAA 55
2AAA 55
Addr. Data
5555 10
5555 40
Notes:
1. Address Format: A14−A0 (Hex); Data Format: DQ7-DQ0 (Hex)
2. Either one of the two Product ID Exit commands can be used.
Publication Release Date: October 1999
-5-
Revision A1