Rainbow Electronics Preliminary - Manual (Page 10)

AT49F004/4096A(T)
10
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 5555. 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/Word Programming Time 10 50 µs
t
AS
Address Set-up Time 0 ns
t
AH
Address Hold Time 100 ns
t
DS
Data Set-up Time 100 ns
t
DH
Data Hold Time 0 ns
t
WP
Write Pulse Width 100 ns
t
WPH
Write Pulse Width High 50 ns
t
EC
Erase Cycle Time 10 seconds
OE
INPUT DATA
ADDRESS
A0 55
5555 5555
AA
2AAA
t BP t WPH t WP
CE
WE
t
AS
tAH t DH
t DS
5555
AA
PROGRAM CYCLE
A0-A18
DATA
OE
(1)
AA 80 55 55
5555 5555
AA
2AAA 2AAA
t
WPH
t
WP
CE
WE
t AS tAH
t EC
t DH
t DS
5555 A0-A18
DATA
Note 2
Note 3
BYTE/
WORD 0
BYTE/
WORD 1
BYTE/
WORD 2
BYTE/
WORD 3
BYTE/
WORD 4
BYTE/
WORD 5