Program cycle characteristics, Program cycle waveforms, Main memory or chip erase cycle waveforms – Rainbow Electronics AT49F1025 User Manual
Page 9
Advertising
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
Advertising