Rainbow Electronics AT49F1025 - Manual (Page 9)

9
AT49F1024/1025
0765I–05/01
Program Cycle Waveforms
Main Memory 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 10H. For a main memory erase, the data should be 30H.
Program Cycle Characteristics
Symbol Parameter Min Typ Max Units
t
BP
Word Programming Time 10 50 µs
t
AS
Address Setup Time 0 ns
t
AH
Address Hold Time 50 ns
t
DS
Data Setup Time 50 ns
t
DH
Data Hold Time 0 ns
t
WP
Write Pulse Width 50 ns
t
WPH
Write Pulse Width High 40 ns
t
EC
Erase Cycle Time 3 seconds
A0-A15
OE
AA 80 NOTE 2 55 55
5555 5555 5555
AA
WORD 0 WORD 1 WORD 2 WORD 3 WORD 4 WORD 5
2AAA 2AAA
t
WPH
t
WP
CE
WE
A0-A15
DATA
t
AS
t
AH
t
EC
t
DH
t
DS
5555