w49v002a Winbond Electronics Corp America, w49v002a Datasheet - Page 16

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

Programmer Interface Mode AC Characteristics, continued
AC Characteristics
Read Cycle Timing Parameters
(V
Write Cycle Timing Parameters
Note: All AC timing signals observe the following guidelines for determining setup and hold times:
Data Polling and Toggle Bit Timing Parameters
Output Hold from Address Change
Reset Time
Address Setup Time
Address Hold Time
R/#C to Write Enable High Time
#WE Pulse Width
#WE High Width
Data Setup Time
Data Hold Time
#OE Hold Time
Byte programming Time
Erase Cycle Time
Read Cycle Time
Row / Column Address Set Up Time
Row / Column Address Hold Time
Address Access Time
Output Enable Access Time
#OE Low to Active Output
#OE High to High-Z Output
#OE to Data Polling Output Delay
#OE to Toggle Bit Output Delay
DD
= 3.3V 5%, V
(a) High level signal's reference level is input high and (b) low level signal's reference level is input low.
Ref. to the AC testing condition.
PARAMETER
PARAMETER
PARAMETER
GND
= 0V, T
A
= 0 to 70 C)
SYMBOL
- 16 -
T
T
T
T
T
T
T
T
T
T
T
T
T
SYM.
SYM.
T
T
T
OEP
OET
T
RST
AS
AH
CWH
WP
WPH
DS
DH
OEH
BP
EC
T
T
T
T
OHZ
OH
OLZ
RC
AS
AH
AA
OE
Preliminary W49V002A
MIN.
100
100
MIN.
MIN.
300
50
50
50
50
50
50
50
1
0
-
-
0
0
-
-
-
-
-
W49V002A
W49V002A
TYP.
0.15
50
-
-
-
-
-
-
-
-
-
MAX.
MAX.
200
100
50
40
40
-
-
-
-
-
MAX.
100
0.2
-
-
-
-
-
-
-
-
-
UNIT
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
S
S
S