| 摘要 |
In an N-bit address trap comparator, an N-bit address trap register stores an N-bit reference address, a bit-by-bit comparator compares an N-bit address with the N-bit reference address bit-by-bit, and an all-bit comparator detects whether or not all outputs of the bit-by-bit comparator have the same value. In a test mode the N-bit reference address is reset so that a first bit of the N-bit reference address is caused to be a first binary value and other bits are caused to be a second binary value. Also, the second binary value is set in all bits of the N-bit address, and then, the N-bit reference address is shifted within the N-bit address trap register.
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