AT45DB321B Datasheet, PDF (1/32 Pages) ATMEL Corporation – 32-megabit 2.7-volt Only DataFlash

Features
• Single 2.7V - 3.6V Supply
• Serial Peripheral Interface (SPI) Compatible
• 20 MHz Max Clock Frequency
• Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 8192 Pages (528 Bytes/Page) Main Memory
• Supports Page and Block Erase Operations
• Two 528-byte SRAM Data Buffers – Allows Receiving of Data
while Reprogramming of Nonvolatile Memory
• Continuous Read Capability through Entire Array
– Ideal for Code Shadowing Applications
• Low Power Dissipation
– 4 mA Active Read Current Typical
– 2 µA CMOS Standby Current Typical
• Hardware Data Protection Feature
• 100% Compatible to AT45DB321
• 5.0V-tolerant Inputs: SI, SCK, CS, RESET and WP Pins
• Commercial and Industrial Temperature Ranges
Description
The AT45DB321B is a 2.7-volt only, serial interface Flash memory ideally suited for
a wide variety of digital voice-, image-, program code- and data-storage applications.
Its 34,603,008 bits of memory are organized as 8192 pages of 528 bytes each. In
addition to the main memor y, the AT45DB321B also contains two SRAM
data buffers of 528 bytes each. The buffers allow receiving of data while a page in the
main memory is being reprogrammed, as well as reading or writing a continuous data
Pin Configurations
Pin Name Function
CS
Chip Select
SCK
Serial Clock
SI
Serial Input
SO
Serial Output
WP
Hardware Page Write Protect Pin
RESET
Chip Reset
RDY/BUSY Ready/Busy
CBGA Top View through Package
12345
A
NC NC NC NC
B
NC NC NC NC NC
C
NC NC NC NC NC
D
NC SCK GND VCC NC
E
NC CS RDY/BSY WP NC
F
NC SO SI RESET NC
G
NC NC NC NC NC
H
NC NC NC NC NC
J
NC NC NC NC NC
32-megabit
2.7-volt Only
DataFlash^®
AT45DB321B
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
TSOP Top View
Type 1
RDY/BUSY 1
RESET 2
WP 3
NC 4
NC 5
NC 6
VCC 7
GND 8
NC 9
NC 10
NC 11
NC 12
CS 13
SCK 14
SI 15
SO 16
32 NC
31 NC
30 NC
29 NC
28 NC
27 NC
26 NC
25 NC
24 NC
23 NC
22 NC
21 NC
20 NC
19 NC
18 NC
17 NC
Note:
DataFlash Card⁽¹⁾
7654321
1. See AT45DCB004 Datasheet
Rev. 2223D–DFLASH–10/02
1