Semiconductor device

摘要

A semiconductor device includes a scan chain that scans out latch signals of a plurality of latches; a first switch that selects any one of an output signal of a combinational circuit and a signal of the scan chain; a first latch that is inserted into the scan chain and receives an output signal of the first switch; a second latch that receives an output signal of the combinational circuit; and a second switch that selects any one of a latch signal of the first latch and a latch signal of the second latch and supplies the selected one to a combinational circuit in a following stage.

主权项

1. A semiconductor device comprising:
a scan chain through that latch signals of a plurality of latches are output; a first switch that selects any one of an output signal of a combinational circuit and a signal of the scan chain; a first latch that is inserted into the scan chain and receives an output signal of the first switch; a second latch that receives an output signal of the combinational circuit; and a second switch that receives a latch signal of the first latch and a latch signal of the second latch, selects any one of the latch signal of the first latch and the latch signal of the second latch, and supplies the selected one to a combinational circuit in a following stage.