AT45DB321D-CCU Adesto Technologies, AT45DB321D-CCU Datasheet - Page 2

• Manufacturer Part Number: AT45DB321D-CCU
• Description: Flash 32M 2.7-3.6V, 66Mhz Serial Flash
• Manufacturer: Adesto Technologies

Specifications of AT45DB321D-CCU

• Rohs: yes
• Data Bus Width: 8 bit
• Memory Type: Data Flash
• Memory Size: 32 Mbit
• Architecture: Flexible, Uniform Erase
• Timing Type: Synchronous
• Interface Type: SPI
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V
• Maximum Operating Current: 15 mA
• Operating Temperature: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: BGA-24
• Factory Pack Quantity: 378

1.
Description
The AT45DB321D is a 2.5V or 2.7V, serial interface, sequential access flash memory ideally suited for a wide variety of digital
voice-, image-, program code-, and data-storage applications. The AT45DB321D supports the RapidS serial interface for
applications requiring very high speed operations. The RapidS serial interface is SPI compatible for frequencies up to 66MHz.
The 34,603,008-bits of memory are organized as 8,192 pages of 512 bytes or 528 bytes each. In addition to the main memory,
the AT45DB321D also contains two SRAM buffers of 512/528 bytes each. These buffers allow the receiving of data while a
page in the main memory is being reprogrammed, as well as the writing of a continuous data stream. EEPROM (electrically
erasable and programmable read-only memory) emulation (bit or byte alterability) is easily handled with a self-contained,
three-step read-modify-write operation. Unlike conventional flash memories, which are accessed randomly with multiple
address lines and a parallel interface, DataFlash
simple sequential access dramatically reduces active pin count, facilitates hardware layout, increases system reliability,
minimizes switching noise, and reduces package size. 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.
To allow for simple, in-system reprogrammability, the AT45DB321D does not require high input voltages for programming. The
device operates from a single power supply, 2.7V to 3.6V, for both the program and read operations. The AT45DB321D 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 serial clock (SCK) lines.
All programming and erase cycles are self timed.
Figure 1-1. Pin configurations and pinouts.
Note:
A
B
C
D
E
RESET
1.
SCK
CS
BGA Package Ball-out
NC
NC
NC
NC
1
The metal pad on the bottom of
the MLF package is floating.
This pad can be a “No Connect” or
connected to GND.
SI
MLF
1
2
3
4
SCK
NC
CS RDY/BSY WP
SO
NC
2
Top View
Top View
(1)
GND
(VDFN)
NC
NC
3
SI
RESET
VCC
NC
NC
4
8
7
6
5
SO
GND
VCC
WP
NC
NC
NC
NC
NC
5
®
Note:
devices use a RapidS serial interface to sequentially access its data. The
RDY/BUSY
RESET
GND
VCC
SCK
WP
SO
NC
NC
NC
NC
NC
CS
SI
TSOP package is not recommended for new designs.
Future die shrinks will support 8-pin packages only.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
RESET
SCK
CS
SI
1
2
3
4
TSOP: Type 1
Top View
Top View
SOIC
AT45DB321D [DATASHEET]
8
7
6
5
SO
GND
VCC
WP
3597R–DFLASH–11/2012
28
27
26
25
24
23
22
21
20
19
18
17
16
15
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
2