Datasheet

AD8158
Rev. B | Page 18 of 36
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1:2 DEMUX
Ox_A[3:0]
Ox_B[3:0]
Ix_B[3:0]
Ix_A[3:0]
PORT C LOOPBACK
PORT A LOOPBACK
PORT B LOOPBACK
2:1 MUX
Ix_C[3:0]
Ox_C[3:0]
0
6646-024
Figure 36. Port-Level Loopback
Table 8. Switch Connectivity vs. Loopback, BICAST, and Port Select Settings
LB_A LB_B LB_C BICAST SEL[3:0] Output Port A Output Port B Output Port C
0 0 0 0 0000 Ix_C[3:0] Idle Ix_A[3:0]
0 0 0 0 1111 Idle Ix_C[3:0] Ix_B[3:0]
0 0 0 1 0000 Ix_C[3:0] Ix_C[3:0] Ix_A[3:0]
0 0 0 1 1111 Ix_C[3:0] Ix_C[3:0] Ix_B[3:0]
0 0 1 0 0000 Ix_C[3:0] Idle Ix_C[3:0]
0 0 1 0 1111 Idle Ix_C[3:0] Ix_C[3:0]
0 0 1 1 0000 Ix_C[3:0] Ix_C[3:0] Ix_C[3:0]
0 0 1 1 1111 Ix_C[3:0] Ix_C[3:0] Ix_C[3:0]
0 1 0 0 0000 Ix_C[3:0] Ix_B[3:0] Ix_A[3:0]
0 1 0 0 1111 Idle Ix_B[3:0] Ix_B[3:0]
0 1 0 1 0000 Ix_C[3:0] Ix_B[3:0] Ix_A[3:0]
0 1 0 1 1111 Ix_C[3:0] Ix_B[3:0] Ix_B[3:0]
0 1 1 0 0000 Ix_C[3:0] Ix_B[3:0] Ix_C[3:0]
0 1 1 0 1111 Idle Ix_B[3:0] Ix_C[3:0]
0 1 1 1 0000 Ix_C[3:0] Ix_B[3:0] Ix_C[3:0]
0 1 1 1 1111 Ix_C[3:0] Ix_B[3:0] Ix_C[3:0]
1 0 0 0 0000 Ix_A[3:0] Idle Ix_A[3:0]
1 0 0 0 1111 Ix_A[3:0] Ix_C[3:0] Ix_B[3:0]
1 0 0 1 0000 Ix_A[3:0] Ix_C[3:0] Ix_A[3:0]
1 0 0 1 1111 Ix_A[3:0] Ix_C[3:0] Ix_B[3:0]
1 0 1 0 0000 Ix_A[3:0] Idle Ix_C[3:0]
1 0 1 0 1111 Ix_A[3:0] Ix_C[3:0] Ix_C[3:0]
1 0 1 1 0000 Ix_A[3:0] Ix_C[3:0] Ix_C[3:0]
1 0 1 1 1111 Ix_A[3:0] Ix_C[3:0] Ix_C[3:0]
1 1 0 0 0000 Ix_A[3:0] Ix_B[3:0] Ix_A[3:0]
1 1 0 0 1111 Ix_A[3:0] Ix_B[3:0] Ix_B[3:0]
1 1 0 1 0000 Ix_A[3:0] Ix_B[3:0] Ix_A[3:0]
1 1 0 1 1111 Ix_A[3:0] Ix_B[3:0] Ix_B[3:0]
1 1 1 0 0000 Ix_A[3:0] Ix_B[3:0] Ix_C[3:0]
1 1 1 0 1111 Ix_A[3:0] Ix_B[3:0] Ix_C[3:0]
1 1 1 1 0000 Ix_A[3:0] Ix_B[3:0] Ix_C[3:0]
1 1 1 1 1111 Ix_A[3:0] Ix_B[3:0] Ix_C[3:0]