请问：am29f040和am29f040b有和区别？ serf 于 2002/04/19 09:03 加贴在 嵌入式系统论坛 设为精华 删除 二者皆为524288*8bit flash.5v only。为何am29f040b不能用而am29f040能用？ -------------------------------- -------------------------------------------------------------------------------- 忽略了一个条件 serf 于 2002/04/19 12:14 加贴在 嵌入式系统论坛 设为精华 删除 可能是速度问题，29f040是90ns 29f040b是120ns，差了30个ns，对于50m的arm来说，大于一个指令周期了，可能是时序问题。 -------------------------------- -------------------------------------------------------------------------------- Compatible with 0.5 µm Am29F040 device hongwind 于 2002/04/19 11:18 加贴在 嵌入式系统论坛 设为精华 删除 Architectural Advantages 5.0V ± 10% single power supply operation Minimizes system level power requirements Manufactured on 0.32 µm process technology Compatible with 0.5 µm Am29F040 device 兼容呀？ Flexible sector architecture 8 uniform sectors of 64 Kbytes each Any combination of sectors can be erased Supports full chip erase Sector protection: A hardware method of locking sectors to prevent any program or erase operations within that sector Compatible with JEDEC standards Pinout and software compatible with single-power-supply Flash standard Superior protection against inadvertent write -------------------------------- -------------------------------------------------------------------------------- b 是指bottom. 就是说在bottom处sector大小和别处的不一样，通常是小。不知道有没有关系？ ruready 于 2002/04/19 11:03 加贴在 嵌入式系统论