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Numéro de référence | AT45D021-TI | ||
Description | 2-Megabit 5-volt Only Serial DataFlash | ||
Fabricant | ATMEL Corporation | ||
Logo | |||
1 Page
Features
• Single 4.5V - 5.5V Supply
• Serial Interface Architecture
• Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 1024 Pages (264 Bytes/Page) Main Memory
• Two 264-Byte SRAM Data Buffers – Allows Receiving of Data
while Reprogramming of Nonvolatile Memory
• Internal Program and Control Timer
• Fast Page Program Time – 7 ms Typical
• 80 µs Typical Page to Buffer Transfer Time
• Low Power Dissipation
– 15 mA Active Read Current Typical
– 15 µA CMOS Standby Current Typical
• 10 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 AT45D021 is a 5-volt only, serial interface Flash memory suitable for in-system
reprogramming. Its 2,162,688 bits of memory are organized as 1024 pages of 264-
bytes each. In addition to the main memory, the AT45D021 also contains two data
SRAM buffers of 264-bytes each. The buffers allow receiving of data while a page in
the main memory is being reprogrammed. Unlike conventional Flash 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 system reliability, minimizes switching
(continued)
Pin Configurations
PLCC
Pin Name
CS
SCK
SI
SO
WP
RESET
RDY/BUSY
Function
Chip Select
Serial Clock
Serial Input
Serial Output
Harware Page Write
Protect Pin
Chip Reset
Ready/Busy
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
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.
PLCC
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
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
2-Megabit
5-volt Only
Serial
DataFlash®
AT45D021
Rev. 0869B–07/98
1
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Pages | Pages 18 | ||
Télécharger | [ AT45D021-TI ] |
No | Description détaillée | Fabricant |
AT45D021-TC | 2-Megabit 5-volt Only Serial DataFlash | ATMEL Corporation |
AT45D021-TI | 2-Megabit 5-volt Only Serial DataFlash | ATMEL Corporation |
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