12

3354F–FLASH–2/05

AT49F002A(N)(T)

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 definitions.)

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

20

50

µs

t

AS

Address Set-up Time

0

ns

Address Hold Time

25

ns

t

DS

Data Set-up Time

25

ns

t

DH

Data Hold Time

0

ns

Write Pulse Width

25

ns

t

WPH

Write Pulse Width High

20

ns

t

EC

Erase Cycle Time

4

8

seconds