AT45DB642_14 Datasheet, PDF (1/37 Pages) ATMEL Corporation – AT45DB642_14

Features
• Single 2.7V - 3.6V Supply
• Dual-interface Architecture
– Dedicated Serial Interface (SPI Modes 0 and 3 Compatible)
– Dedicated Parallel I/O Interface (Optional Use)
• Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 8192 Pages (1056 Bytes/Page) Main Memory
• Supports Page and Block Erase Operations
• Two 1056-byte SRAM Data Buffers – Allows Receiving of Data
while Reprogramming the Flash Array
• 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
• 20 MHz Maximum Clock Frequency – Serial Interface
• 5 MHz Maximum Clock Frequency – Parallel Interface
• Hardware Data Protection
• Commercial and Industrial Temperature Ranges
Description
The AT45DB642 is a 2.7-volt only, dual-interface Flash memory ideally suited for a
wide variety of digital voice-, image-, program code- and data-storage applications. The
dual-interface of the AT45DB642 allows a dedicated serial interface to be connected to a
DSP and a dedicated parallel interface to be connected to a microcontroller or vice versa.
Pin Configurations
Pin Name
CS
SCK/CLK
SI
SO
I/O7 - I/O0
WP
RESET
RDY/BUSY
SER/PAR
Function
Chip Select
Serial Clock/Clock
Serial Input
Serial Output
Parallel Input/Output
Hardware Page Write Protect Pin
Chip Reset
Ready/Busy
Serial/Parallel Interface Control
DataFlash Card⁽¹⁾
TSOP Top View
Type 1
NC 1
NC 2
RDY/BUSY 3
RESET 4
WP 5
NC 6
NC 7
NC 8
VCC 9
GND 10
NC 11
NC 12
NC 13
NC 14
CS 15
SCK/CLK 16
SI* 17
SO* 18
NC 19
NC 20
40 NC
39 NC
38 NC
37 NC
36 NC
35 I/O7*
34 I/O6*
33 I/O5*
32 I/O4*
31 VCCP*
30 GNDP*
29 I/O3*
28 I/O2*
27 I/O1*
26 I/O0*
25 SER/PAR*
24 NC
23 NC
22 NC
21 NC
Note:
*Optional Use – See pin description
text for connection information.
7654321
64-megabit
2.7-volt Only
Dual-interface
DataFlash^®
AT45DB642
Note: 1. See AT45DCB008 Datasheet.
Rev. 1638F–DFLSH–09/02
1