公开(公告)号：US6157207A

公开(公告)日：2000-12-05

申请号：US76367

申请日：1998-05-11

申请人： David D. Eaton ,  Sudarshan Varshney ,  Paige A. Kolze

发明人： David D. Eaton ,  Sudarshan Varshney ,  Paige A. Kolze

IPC分类号： H01L21/8234 ,  H01L27/118 ,  G06F7/38 ,  H03K19/177

CPC分类号： H01L27/11807 ,  H01L21/823462

摘要： To protect logic module output devices from high voltages, logic modules are not powered during antifuse programming. In some embodiments, two separate power input terminals VCC1 and VCC2 are provided: power input terminal VCC1 being coupled to power the logic modules, and power input terminal VCC2 being coupled to power the programming control circuitry. Power terminal VCC1 is left floating or is grounded during antifuse programming such that the logic modules are not powered but such that the programming circuitry is powered during antifuse programming via the second power terminal VCC2. Logic module output protection transistors are not required nor is the associated charge pump. Because the logic module input devices are not powered, a current surge through the input devices on power up does not occur and an internal disable signal and associated circuitry is not required. In one embodiment, the field programmable gate array is made smaller because it has no internal disable signal and associated circuitry, no logic module output protection transistors, and no charge pump that operates during normal circuit operation. In embodiments, power input terminal VCC2 is a high voltage compatible power input terminal.

摘要翻译： 为了保护逻辑模块输出设备免受高电压的影响，逻辑模块在反熔丝编程期间未通电。 在一些实施例中，提供两个单独的电源输入端子VCC1和VCC2：电源输入端子VCC1被耦合以对逻辑模块供电，并且电源输入端子VCC2被耦合以对编程控制电路供电。 电源端子VCC1在反熔丝编程期间处于悬空状态或接地状态，使得逻辑模块未通电，而使编程电路在反熔丝编程期间通过第二电源端子VCC2供电。 不需要逻辑模块输出保护晶体管，也不需要相关的电荷泵。 由于逻辑模块输入设备未通电，所以不会在上电时通过输入设备产生电流浪涌，并且不需要内部禁用信号和相关电路。 在一个实施例中，由于现场可编程门阵列没有内部禁用信号和相关联的电路，没有逻辑模块输出保护晶体管，并且没有在正常电路操作期间操作的电荷泵，所以现场可编程门阵列被制造得更 在实施例中，电源输入端子VCC2是高电压兼容电力输入端子。