11
AT49F001A(N)(T)
3365C–FLASH–9/03
Program Cycle Waveforms
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 definitions.)
3. For chip erase, the data should be 10H, and for sector erase, the data should be 30H.
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 25 ns
t
DS
Data Set-up Time 20 ns
t
DH
Data Hold Time 0 ns
t
WP
Write Pulse Width 20 ns
t
WPH
Write Pulse Width High 20 ns
t
EC
Erase Cycle Time 3 5 seconds
6
6