42 Am49DL640BG March 8, 2002
PRELIMINARY
FLASH AC CHARACTERISTICS
Word/Byte Configurat ion (CIOf)
Parameter Speed
JEDEC Std Description 70 85 Unit
t
ELFL/
t
ELFH
CE#f to CIOf Switching Low or High Max 5 ns
t
FLQZ
CIOf Switching Low to Output HIGH Z Max 30 ns
t
FHQV
CIOf Switching High to Output Active Min 70 85 ns
DQ15
Output
Data Output
(DQ7–DQ0)
CE#f
OE#
CIOf
t
ELFL
DQ0–DQ14
Data Output
(DQ14–DQ0)
DQ15/A-1
Address
Input
t
FLQZ
CIOf
Switching
from word
to byte
mode
DQ15
Output
Data Output
(DQ7–DQ0)
CIOf
t
ELFH
DQ0–DQ14
Data Output
(DQ14–DQ0)
DQ15/A-1
Address
Input
t
FHQV
CIOf
Switching
from byte
to word
mode
Figure 16. CIOf Timings for Read Operations
Note: Refer to the Erase/P rogram Operations table for t
AS
and t
AH
specificati ons.
Figure 17. CIOf Timings for Write Operations
CE#f
WE#
CIOf
The falling edge of the last WE# signal
t
HOLD
(t
AH
)
t
SET
(t
AS
)
