11
3358C–FLASH–3/05
AT49BV040A
18. Program Cycle Waveforms
19. Sector or Chip Erase Cycle Waveforms
Notes: 1. OE must be high only when WE and CE are both low.
2. For chip erase, the address should be 555. For sector erase, the address depends on what sector is to be erased.
(See note 4 under “Command Definition Table” on page 6.)
3. For chip erase, the data should be 10H, and for sector erase, the data should be 30H.
17. Program Cycle Characteristics
Symbol Parameter Min Typ Max Units
t
BP
Byte Programming Time 30 50 µs
t
AS
Address Set-up Time 0 ns
t
AH
Address Hold Time 40 ns
t
DS
Data Set-up Time 40 ns
t
DH
Data Hold Time 0 ns
t
WP
Write Pulse Width 30 ns
t
WPH
Write Pulse Width High 30 ns
t
EC
Chip Erase Cycle Time 12 seconds
0 - A18
OE
(1)
AA
80
Note 3
55 55
555
555
Note 2
AA
BYTE 0
BYTE 1 BYTE 2
BYTE 3
BYTE 4
BYTE 5
AAA AAA
t
WPH
t
WP
CE
WE
A0 - A18
DATA
t
AS
t
AH
t
EC
t
DH
t
DS
555
