AT45D041 Datasheet, PDF (1/16 Pages) ATMEL Corporation – 4-Megabit 5-volt Only Serial DataFlash

AT45D041
Features
• Single 4.5V - 5.5V Supply
• Serial Interface Architecture
• Page Program Operation
- Single Cycle Reprogram (Erase and Program)
- 2048 Pages (264 Bytes/Page) Main Memory
• Two 264-Byte Data Buffers - Allows Receiving of Data while Reprogramming of
Non-Volatile 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
- 20 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 AT45D041 is a 5-volt only, serial interface Flash memory suitable for in-system
reprogramming. Its 4,325,376 bits of memory are organized as 2048 pages of 264-
bytes each. In addition to the main memory, the AT45D041 also contains two 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 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 facil-
itates hardware layout, increases system reliability, minimizes switching noise, and
Pin Configurations
(continued)
PLCC
Pin Name
Function
CS
SCK
SI
SO
WP
Chip Select
Serial Clock
Serial Input
Serial Output
Hardware Page Write
Protect Pin
SCK 5
SI 6
SO 7
NC 8
NC 9
NC 10
NC 11
NC 12
NC 13
29 WP
28 RESET
27 RDY/BUSY
26 NC
25 NC
24 NC
23 NC
22 NC
21 NC
RESET
RDY/BUSY
Chip Reset
Ready/Busy
Note: PLCC package pins 16
and 17 are DON’T CONNECT.
RDY/BUSY 1
RESET 2
WP 3
NC 4
NC 5
VCC 6
GND 7
NC 8
NC 9
NC 10
CS 11
SCK 12
SI 13
SO 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
SOIC
GND
1
NC
2
NC
3
CS
4
SCK
5
SI
6
SO
7
NC
8
NC
9
NC
10
NC
11
NC
12
NC
13
NC
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
4-Megabit
5-volt Only
Serial
DataFlash^™
AT45D041
0803C-D–6/97
1