AT49BV640S Datasheet, PDF (1/8 Pages) ATMEL Corporation – 64-megabit (4M x 16) Secure 3-volt Only Memory

Features
• Single Voltage Operation Read/Write: 2.65V - 3.6V
• Access Time – 70 ns
• Sector Erase Architecture
– One Hundred Twenty-seven 32K Word (64K Bytes) Main Sectors with
Individual Write Lockout
– Eight 4K Word (8K Bytes) Sectors with Individual Write Lockout
• Fast Word Program Time – 10 µs
• Typical Sector Erase Time: 32K Word Sectors – 700 ms; 4K Word Sectors – 100 ms
• Suspend/Resume Feature for Erase and Program
– Supports Reading and Programming Data from Any Sector by Suspending
Erase of a Different Sector
– Supports Reading Any Word by Suspending Programming of Any Other Word
• Low-power Operation
– 10 mA Active
– 15 µA Standby
• VPP Pin for Write Protection and Accelerated Program Operation
• RESET Input for Device Initialization
• Softlock Sector Protection
• Secure Lock and Freeze Feature
• Top or Bottom Boot Block Configuration Available
• 128-bit Protection Register
• Minimum 100,000 Erase Cycles
• Common Flash Interface (CFI)
• CBGA Green (Pb/Halide-free/RoHS Compliant) Packaging
1. Description
The AT49BV640S(T) is a 2.7-volt 32-megabit Flash memory organized as 4,194,304
words of 16 bits each. The memory is divided into 135 sectors for erase operations.
The device is offered in a 64-ball CBGA package. The device has CE and OE control
signals to avoid any bus contention. This device can be read or reprogrammed using
a single power supply, making it ideally suited for in-system programming.
In some applications, in addition to the standard softlock sector protection mecha-
nism, a requirement exists to allow for the permanent and irreversible locking of
selected regions in the memory. The AT49BV640S(T) allows the user to permanently
lock thirty-eight regions, and once activated these secure regions cannot be altered or
erased through Software or Hardware at any time. Once activated, no facility exists to
over-ride the secure lock mechanism. The size and the location of the secure regions
is determined by the Top or Bottom Boot Block designation. The location of the secure
regions is shown on pages 3 - 6.
The secure regions can be locked in any sequence and at any time during normal
device operation. Read operations can still be performed on any region that has the
secure lock feature enabled. Full read/write operations and standard sector opera-
tions including standard Sector locking can be performed on all regions that are not
secure locked.
64-megabit
(4M x 16)
Secure
3-volt Only
Memory
AT49BV640S
AT49BV640ST
Summary
(Complete
Datasheet
under NDA)
NOTE: This is a summary document.
The complete document is available
under NDA. For more information,
please contact your local Atmel sales
office.
3583AS–FLASH–9/06