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Atmel Electronic Components Datasheet

AT45D081A Datasheet

8-megabit 5-volt Only Serial DataFlash

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AT45D081A pdf
Features
100% Compatible to AT45D081
Single 4.5V - 5.5V Supply
Serial Interface Architecture
Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 4096 Pages (264 Bytes/Page) Main Memory
Optional Page and Block Erase Operations
Two 264-byte SRAM Data Buffers – Allows Receiving of Data
while Reprogramming of Nonvolatile Memory
Continuous Read Capability through Entire Array
Internal Program and Control Timer
Low Power Dissipation
– 15 mA Active Read Current Typical
– 10 µA CMOS Standby Current Typical
15 MHz Max Clock Frequency
Hardware Data Protection Feature
Serial Peripheral Interface (SPI) Compatible – Modes 0 and 3
CMOS and TTL Compatible Inputs and Outputs
Commercial and Industrial Temperature Ranges
Description
The AT45D081A is a 5-volt only, serial interface Flash memory suitable for in-system
reprogramming. Its 8,650,752 bits of memory are organized as 4096 pages of
264 bytes each. In addition to the main memory, the AT45D081A also contains two
SRAM data buffers of 264 bytes each. The buffers allow receiving of data while a
page in the main memory is being reprogrammed. Unlike conventional Flash
Pin Configurations
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(continued)
Pin Name
CS
SCK
SI
SO
WP
RESET
Function
Chip Select
Serial Clock
Serial Input
Serial Output
Hardware Page Write
Protect Pin
Chip Reset
RDY/BUSY
RESET
WP
NC
NC
VCC
GND
NC
NC
NC
CS
SCK
SI
SO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TSOP Top View
Type 1
28 NC
27 NC
26 NC
25 NC
24 NC
23 NC
22 NC
21 NC
20 NC
19 NC
18 NC
17 NC
16 NC
15 NC
RDY/BUSY Ready/Busy
PLCC
SOIC
SCK
SI
SO
NC
NC
NC
NC
NC
NC
5
6
7
8
9
10
11
12
13
29 WP
28 RESET
27 RDY/BUSY
26 NC
25 NC
24 NC
23 NC
22 NC
21 NC
Note: PLCC package pins 16
and 17 are DON’T CONNECT.
GND
NC
NC
CS
SCK
SI
SO
NC
NC
NC
NC
NC
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VCC
27 NC
26 NC
25 WP
24 RESET
23 RDY/BUSY
22 NC
21 NC
20 NC
19 NC
18 NC
17 NC
16 NC
15 NC
8-megabit
5-volt Only
Serial
DataFlash®
AT45D081A
Recommend using
AT45DB081B for new
designs.
Rev. 1640C–01/01
1


Atmel Electronic Components Datasheet

AT45D081A Datasheet

8-megabit 5-volt Only Serial DataFlash

No Preview Available !

AT45D081A pdf
memories that are accessed randomly with multiple
address lines and a parallel interface, the DataFlash uses a
serial interface to sequentially access its data. The simple
serial interface facilitates hardware layout, increases sys-
tem reliability, minimizes switching noise, and reduces
package size and active pin count. The device is optimized
for use in many commercial and industrial applications
where high density, low pin count, low voltage, and low
power are essential. Typical applications for the DataFlash
are digital voice storage, image storage, and data storage.
The device operates at clock frequencies up to 15 MHz
with a typical active read current consumption of 15 mA.
To allow for simple in-system reprogrammability, the
AT45D081A does not require high input voltages for pro-
gramming. The device operates from a single power
supply, 4.5V to 5.5V, for both the program and read opera-
tions. The AT45D081A is enabled through the chip select
pin (CS) and accessed via a three-wire interface consisting
of the Serial Input (SI), Serial Output (SO), and the Serial
Clock (SCK).
All programming cycles are self-timed, and no separate
erase cycle is required before programming.
Block Diagram
WP FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER 1 (264 BYTES)
BUFFER 2 (264 BYTES)
SCK
CS
RESET
VCC
GND
RDY/BUSY
I/O INTERFACE
SI SO
Memory Array
To provide optimal flexibility, the memory array of the
AT45D081A is divided into three levels of granularity com-
prised of sectors, blocks and pages. The Memory Architec-
ture Diagram illustrates the breakdown of each level and
details the number of pages per sector and block. All pro-
gram operations to the DataFlash occur on a page by page
basis; however, the optional erase operations can be per-
formed at the block or page level.
2 AT45D081A


Part Number AT45D081A
Description 8-megabit 5-volt Only Serial DataFlash
Maker ATMEL Corporation
Total Page 28 Pages
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