BRIGHT
Microelectronics
Inc.
Preliminary BM29F400T/BM29F400B
Switching Waveforms, continued
/Data Polling
PA
5555H
Address
CE
PA
AH
t
WC
t
AS
t
GHWL
t
OE
WP
t
WHWH1
t
WPH
t
WE
tCS
DH
t
A0H
OUT
D
DQ7
PD
Data
DS
t
5.0V
VCC
GND
Figure 9. AC Waveforms Program Operations
Notes:
1. PA is address of the memory location to be programmed.
2. PD is data to be programmed at BYTE address.
3. /DQ7 is the output of the complement of the data written to the device.
4. DOUT is the output of the data written to the device.
5. Figure indicates last two bus cycles of four bus cycle sequence.
6. These waveforms are for 16-bit mode.
AS
t
AH
t
Address
CE
5555H
2AAAH
5555H
SA
5555H
2AAAH
GHWL
t
OE
WP
t
WE
WPH
t
CS
DH
t
t
10H/30H
Data
5.0V
80H
55H
AAH
55H
AAH
DS
t
VCS
t
V
GND
CC
Figure 10. AC Waveforms Chip/Sector Erase Operations
Notes:
1. SA is the sector address for Sector Erase. Address = X = Don't Care for Chip Erase.
2. These waveforms are for 16-bit mode.
A Winbond Company
- 27 -
Publication Release Date: May 1999
Revision A1
WINBOND [ WINBOND ]
