BRIGHT
Microelectronics
Inc.
Preliminary BM29F040
Switching Waveforms
Data Polling
Vih
Addresses (A)
PA
5555H
t WC
PA
Vil
t
AH
t RC
t
AS
Vih
WE (W)
Vil
tGHEL
Vih
OE (G)
CE (E)
Vil
t
CPH
t
WHWH1
tWS
Vih
t
DF
Vil
t CP
tDS
tOH
t OE
DH
t
Vih
Vil
HIGH Z
A0H
PD
DQ7
DATA (D/Q)
DOUT
CE
t
5.0 V
GND
Vcc
Figure 10.A.C.Waveforms for Program Operations (
Controlled Writes)
CE
Notes:
1. PA is the address of the memory location to be programmed.
2. PD is the data to be programmed at the 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.
Switching Waveforms
t
AS
Vih
Addresses (A)
2AAAH
SA
5555H
2AAAH
tAH
5555H
5555H
Vil
Vih
CE (E)
Vil
tGHWL
Vih
OE (G)
Vil
t
CS
t
WP
Vih
WE (W)
Vil
WPH
t
tDS
AAH
tDH
Vih
DATA (D/Q)
Vil
HIGH Z
55H
AAH
80H
55H
30H for sector erase
10H for chip erase
tVCS
5.0 V
Vcc
GND
Figure 11. A.C. Waveforms for Chip/Sector Erase Operations
Note: SA is the sector address for Sector erase or 5555H for Chip Erase.
A Winbond Company
- 23 -
Publication Release Date: June 1999
Revision A1
WINBOND [ WINBOND ]
