BRIGHT
Microelectronics
Inc.
BM29F400T/BM29F400B
Switching Waveforms, continued
CH
t
CE
OE
DF
OE
t
t
OEH
t
WE
CE
t
OH
t
DQ7
Data
DQ7
DQ7=Valid Data
WHWH 1 or 2
t
High
Z
DQ0-DQ7
Valid Data
DQ0-DQ6
DQ0-DQ6=Invalid
OE
t
5.0V
V
CC
GND
Figure 11. AC Waveforms for
Polling during Internal Algorithm Operations
Data
Note: DQ7 = Valid Data (The device has completed the internal program or erase operation.)
CE
OEH
t
OE
OES
t
WE
DQ6=
Stop Toggling
Data
(DQ0-DQ7)
DQ0-DQ7
Valid
DQ6=Toggle
DQ6=Toggle
Data
5.0V
OE
t
VCC
GND
Figure 12 AC Waveforms for Toggle Bit during Internal Algorithm Operation
Note: DQ6 stops toggling (The device has completed the internal program or erase operation.)
A Winbond Company
Publication Release Date: December 1999
Revision A2
- 27 -
WINBOND [ WINBOND ]
