AT45DB321 Datasheet, PDF (1/20 Pages) ATMEL Corporation – 32-Megabit 2.7-volt Only Serial DataFlash

Features
• Single 2.7V - 3.6V Supply
• Serial Interface Architecture
• Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 8192 Pages (528 Bytes/Page) Main Memory
• Optional Page and Block Erase Operations
• Two 528-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
• 120 µs Typical Page to Buffer Transfer Time
• Low-Power Dissipation
– 4 mA Active Read Current Typical
– 3 µA CMOS Standby Current Typical
• 13 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 AT45DB321 is a 2.7-volt only, serial interface Flash memory suitable for in-sys-
tem reprogramming. Its 34,603,008 bits of memory are organized as 8192 pages of
528 bytes each. In addition to the main memory, the AT45DB321 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. Unlike conventional Flash memo-
(continued)
Pin Configurations
CBGA Top View Through Package
Pin Name Function
12345
CS
SCK
SI
SO
WP
Chip Select
Serial Clock
Serial Input
Serial Output
Hardware Page
Write Protect Pin
A
NC NC NC NC
B
NC SCK GND VCC NC
C
NC CS RDY/BSY WP NC
D
NC SO SI RESET NC
E
NC NC NC NC NC
RESET
Chip Reset
RDY/BUSY Ready/Busy
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
32-Megabit
2.7-volt Only
Serial
DataFlash^®
AT45DB321
Preliminary
AT45DB321
Preliminary 16-
Megabit 2.7-volt
Only Serial
DataFlash
Rev. 1121A–09/98
1