AT49BV640S 364Mbit,

Density 64M
Organization 4M x 16
Speed 70 ns
Vcc (V) 2.7V - 3.6V
Pb-Free
Packages
CBGA 64 (8x8)

64-Mbit (4M x 16), Secure 3-volt Only Memory, Bottom Boot Block.

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 mechanism, 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 operations including standard Sector locking can be performed on all regions that are not secure locked.

The AT49BV640S(T) device also contains a freeze feature that will freeze the lock status of the secure regions. The freeze feature prevents any further locking of the secure regions. If the user requires certain regions to be locked, then these regions must be programmed and locked prior to activation of the freeze command. It is important to note that enabling the freeze feature is irreversible.

AT49BV640S 特性
AT49BV640S 订购型号
Devices Package
AT49BV640S
AT49BV640ST
CBGA 64 (8x8)
AT49BV640S 应用技术支持与电子电路设计开发资源下载
  1. ATMEL 爱特梅尔Flash 存储器AT49BV640S 数据手册DataSheet 下载. PDF(PDF 文件格式完整版)
  2. 并行Flash 产品选型指南Excel 文档格式选型 Excel 文档格式)
  3. ATMEL 爱特梅尔公司全线产品目录. pdf