Preliminary W928C73
- 32 -
FLASH ROM AC CHARACTERISTICS
(V
DD
= 3V, V
SS
= 0V, T
A
= 25
°
C)
PARAMETER
SYMBOL
CONDITIONS
MIN. TYP. MAX.
UNIT
MODE Pulse Width
T
MP
-
1
-
-
µ
S
CTRL Pulse Width
T
WP
Page coding mode
400
-
700
µ
S
Clock Frequency of ADDR
F
ADDR
-
-
-
1
MHz
Clock Frequency of CLK
F
CLK
-
-
-
1
MHz
Clock Ffrequency of CTRL
F
CTRL
-
-
-
1
MHz
Interval Between ADDR End
& CLK Begin
T
I
Read/Write mode
1
-
-
µ
S
Interval Between CLK &
CTRL
T
GCC
Write mode
1
-
-
µ
S
Interval Between ADDR &
CTRL
T
GCA
Page coding mode
1
-
-
µ
S
Interval Between Addressing
End & Block-erase Begin
T
AE
Block erase mode
1
-
-
µ
S
Interval Between MODE
Rising Edge & CTRL Clock
Begin
T
MB
Mode selection
500
-
-
nS
Interval Between CTRL
Clock End & MODE Falling
Edge
T
ME
Mode selection
500
-
-
nS
Interval Between MODE
Falling Edge & Another Pin
Active
T
GM
-
1
-
-
µ
S
Data Access Time
T
RA
Read mode
-
-
500
nS
Data Set-up Time
T
WS
Write mode
250
-
-
nS
T
AS
-
250
-
-
nS
Data Hold Time
T
RH
Read mode
0
-
-
nS
T
WH
Write mode
10
-
-
nS
T
AH
-
10
-
-
nS
Programming Duration
T
PR
Write mode
400
-
-
µ
S
Whole-chip-erase Time
T
WE
Whole-chip-erase
mode
45
-
50
mS
Block-erase Time
T
BE
Block-erase mode
40
-
45
mS
