Author: ZmnSCPxj 2021-02-13 06:10:08
Published on: 2021-02-13T06:10:08+00:00
The email discusses using scan mode for masking and provides a code snippet to demonstrate how this can be done. The code uses inputs CLK, RESET_N, TESTMODE, and SCANOUT_INTERNAL, and outputs SCANOUT_PAD. The circuit includes a gating register, which is used to prevent glitches during normal operation. The email suggests inverting the sense of gating and using a NOR gate at the output, which might result in a smaller circuit. However, the author notes that over-optimizing this is not necessary since large ICs typically only need 4 to 8 scan chains.
Updated on: 2023-06-14T17:14:48.213458+00:00