AT49F1024A Просмотр технического описания (PDF) - Atmel Corporation
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AT49F1024A Datasheet PDF : 14 Pages
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Features
• Single-voltage Operation
– 5V Read
– 5V Reprogramming
• Fast Read Access Time – 45 ns
• Internal Program Control and Timer
• 8K Word Boot Block with Lockout
• Fast Erase Cycle Time – 1.5 seconds
• Word-by-word Programming – 10 µs/Word Typical
• Hardware Data Protection
• Data Polling for End of Program Detection
• Small 10 x 14 mm VSOP Package
• Typical 10,000 Write Cycles
Description
The AT49F1024A is a 5-volt-only in-system Flash memory organized as 65,536 words
by 16 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the
devices offer access times to 45 ns with power dissipation of just 275 mW over the
commercial temperature range. When the device is deselected, the CMOS standby
current is less than 100 µA.
To allow for simple in-system reprogrammability, the AT49F1024A 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 AT49F1024A is performed by erasing a
block of data (entire chip or main memory block) and then programming on a word-by-
word basis. The typical word programming time is a fast 10 µs. The end of a program
cycle can be optionally detected by the Data Polling feature. Once the end of a byte
program cycle has been detected, a new access for a read or program can begin. The
typical number of program and erase cycles is in excess of 10,000 cycles.
1-megabit
(64K x 16)
5-volt Only
Flash Memory
AT49F1024A
Pin Configurations
Pin Name Function
A0 - A15
Addresses
CE
Chip Enable
OE
Output Enable
WE
Write Enable
I/O0 - I/O15 Data Inputs/Outputs
NC
No Connect
VSOP Top View
Type 1
10 x 14 mm
A9 1
A10 2
A11 3
A12 4
A13 5
A14 6
A15 7
NC 8
WE 9
VCC 10
NC 11
CE 12
I/O15 13
I/O14 14
I/O13 15
I/O12 16
I/O11 17
I/O10 18
I/O9 19
I/O8 20
40 GND
39 A8
38 A7
37 A6
36 A5
35 A4
34 A3
33 A2
32 A1
31 A0
30 OE
29 I/O0
28 I/O1
27 I/O2
26 I/O3
25 I/O4
24 I/O5
23 I/O6
22 I/O7
21 GND
3415B–FLASH–12/03
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