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AT49F040A-70PI

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
10
AT49F040A
3359A–FLASH–6/03
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 20 40 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 6 7 seconds
8
8
11
AT49F040A
3359A–FLASH–6/03
Notes: 1. These parameters are characterized and not 100% tested.
2. See t
OE
spec in AC Read Characteristics.
Data Polling Waveforms
Notes: 1. These parameters are characterized and not 100% tested.
2. See t
OE
spec in AC Read Characteristics.
Toggle Bit Waveforms
(1)(2)(3)
Notes: 1. Toggling either OE or CE or both OE and CE will operate toggle bit. The t
OEHP
specification must be met by the toggling
input(s).
2. Beginning and ending state of I/O6 will vary.
3. Any address location may be used but the address should not vary.
Data Polling Characteristics
(1)
Symbol Parameter Min Typ Max Units
t
DH
Data Hold Time 10 ns
t
OEH
OE Hold Time 10 ns
t
OE
OE to Output Delay
(2)
ns
t
WR
Write Recovery Time 0 ns
HIGH Z
An An An An An
WE
CE
OE
I/O7
A0-A18
t
OEH
t
OE
t
DH
t
WR
Toggle Bit Characteristics
(1)
Symbol Parameter Min Typ Max Units
t
DH
Data Hold Time 10 ns
t
OEH
OE Hold Time 10 ns
t
OE
OE to Output Delay
(2)
ns
t
OEHP
OE High Pulse 50 ns
t
WR
Write Recovery Time 0 ns
WE
CE
OE
I/O6
t
OEH
HIGH Z
t
DH
t
OE
t
WR
t
OEHP
12
AT49F040A
3359A–FLASH–6/03
Software Product Identification
Entry
(1)
Software Product Identification Exit
(1)
Notes: 1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A11 - A0 (Hex).
2. A1 - A18 = V
IL
.
Manufacture Code is read for A0 = V
IL
;
Device Code is read for A0 = V
IH
.
Additional Device Code is read for address 0003H
3. The device does not remain in identification mode
if powered down.
4. The device returns to standard operation mode.
5. Manufacturer Code: 1FH
Device Code: 13H
Additional Device Code: 0FH
LOAD DATA AA
TO
ADDRESS 555
LOAD DATA 55
TO
ADDRESS AAA
LOAD DATA 90
TO
ADDRESS 555
ENTER PRODUCT
IDENTIFICATION
MODE
(2)(3)(5)
LOAD DATA AA
TO
ADDRESS 555
LOAD DATA 55
TO
ADDRESS AAA
LOAD DATA F0
TO
ADDRESS 555
EXIT PRODUCT
IDENTIFICATION
MODE
(4)
OR
LOAD DATA F0
TO
ANY ADDRESS
EXIT PRODUCT
IDENTIFICATION
MODE
(4)
Boot Block Lockout Feature Enable
Algorithm
(1)
Notes: 1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A11 - A0 (Hex).
2. Boot block lockout feature enabled.
LOAD DATA AA
TO
ADDRESS 555
LOAD DATA 55
TO
ADDRESS AAA
LOAD DATA 80
TO
ADDRESS 555
LOAD DATA AA
TO
ADDRESS 555
LOAD DATA 55
TO
ADDRESS AAA
LOAD DATA 40
TO
ADDRESS 555
PAUSE 1 second
(2)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

AT49F040A-70PI

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Description:
IC FLASH 4M PARALLEL 32DIP
Lifecycle:
New from this manufacturer.
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