Features
• Single Voltage Operation
– 5V Read
– 5V Reprogramming
• Fast Read Access Time - 50 ns
• Internal Program Control and Timer
• 8K Bytes Boot Block With Lockout
• Fast Erase Cycle Time - 10 seconds
• Byte-by-Byte Programming - 10 µs/Byte
• Hardware Data Protection
• DATA Polling For End Of Program Detection
• Low Power Dissipation
– 30 mA Active Current
– 100 µA CMOS Standby Current
• Typical 10,000 Write Cycles
512K (64K x 8)
5-volt Only
Flash Memory
Description
The AT49F512 is a 5-volt-only in-system programmable and erasable Flash Memory.
Its 512K of memory is organized as 65,536 words by 8 bits. Manufactured with
Atmel’s advanced nonvolatile CMOS technology, the devices offer access times to 50
ns with a power dissipation of just 165 mW over the commercial temperature range.
When the device is deselected, the CMOS standby current is less than 100 µA.
AT49F512
To allow for simple in-system reprogrammability, the AT49F512 does not require high
input voltages for programming. Five-volt-only commands determine the read and
programming operation of the device. Reading data out of the device is similar to
reading from an EPROM. Reprogramming the AT49F512 is performed by erasing the
entire 512K of memory and then programming on a byte by byte basis. The typical
byte programming time is a fast 10 µs. The end of a program cycle can be optionally
(continued)
Pin Configurations
DIP Top View
Pin Name
A0 - A15
CE
Function
NC
NC
A15
A12
A7
1
2
3
4
5
6
7
8
9
32 VCC
31 WE
30 NC
29 A14
28 A13
27 A8
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
No Connect
A6
OE
A5
26 A9
A4
25 A11
24 OE
23 A10
22 CE
21 I/O7
20 I/O6
19 I/O5
18 I/O4
17 I/O3
512K (64K x 8)
5-volt Only
CMOS Flash
Memory
A3
WE
A2 10
A1 11
I/O0 - I/O7
NC
A0 12
I/O0 13
I/O1 14
I/O2 15
GND 16
VSOP Top View (8 x 14 mm) or
TSOP Top View (8 x 20 mm)
Type 1
PLCC Top View
A11
A9
1
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
OE
2
A10
CE
A8
3
A7
A6
A5
A4
A3
5
6
7
8
9
29 A14
A13
A14
NC
WE
VCC
NC
NC
A15
A12
A7
4
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
28 A13
27 A8
26 A9
25 A11
24 OE
23 A10
22 CE
21 I/O7
5
6
7
8
A2 10
A1 11
A0 12
I/O0 13
9
10
11
12
13
14
15
16
Rev. 1027D–04/99
A6
A1
A5
A2
A4
A3
1