at49f4096a ATMEL Corporation, at49f4096a Datasheet - Page 2

• Manufacturer Part Number: at49f4096a
• Description: 4-megabit 512k X 8/ 256k X 16 Flash Memory
• Manufacturer: ATMEL Corporation

2
AT49F4096A
AT49F4096A SOIC (SOP)
I/O10
I/O11
GND
I/O0
I/O8
I/O1
I/O9
I/O2
I/O3
A17
NC
NC
CE
OE
A7
A6
A5
A4
A3
A2
A1
A0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
RESET
WE
A8
A9
A10
A11
A12
A13
A14
A15
A16
BYTE
GND
I/O15/A-1
I/O7
I/O14
I/O6
I/O13
I/O5
I/O12
I/O4
VCC
The device is erased by executing the Erase command sequence; the device internally
controls the erase operation. The memory is divided into four blocks for erase opera-
tions. There are two 4K word parameter block sections, the boot block, and the main
memory array block. The typical number of program and erase cycles is in excess of
10,000 cycles.
The 8K word boot block section includes a reprogramming lockout feature to provide
data integrity. This feature is enabled by a command sequence. Once the boot block
programming lockout feature is enabled, the data in the boot block cannot be changed
when input levels of 5.5 volts or less are used. The boot sector is designed to contain
user secure code.
For the AT49F4096A, the BYTE pin controls whether the device data I/O pins operate in
the byte or word configuration. If the BYTE pin is set at a logic “1” or left open, the device
is in word configuration, I/O0 - I/O15 are active and controlled by CE and OE.
If the BYTE pin is set at logic “0”, the device is in byte configuration, and only data I/O
pins I/O0 - I/O7 are active and controlled by CE and OE. The data I/O pins I/O8 - I/O14
are tri-stated and the I/O15 pin is used as an input for the LSB (A-1) address function.
RESET
A15
A14
A13
A12
A11
A10
A17
WE
NC
NC
NC
NC
NC
NC
A9
A8
A7
A6
A5
A4
A3
A2
A1
AT49F4096A TSOP Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Type 1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
A16
BYTE
GND
I/O15 / A-1
I/O7
I/O14
I/O6
I/O13
I/O5
I/O12
I/O4
VCC
I/O11
I/O3
I/O10
I/O2
I/O9
I/O1
I/O8
I/O0
OE
GND
CE
A0
1604F–FLASH–4/04