215
Signal Integrity and Reliability of Network-on-Chip
FTC_2
(3–4 coding)
FTC_11
(2–3 coding)
FTC_1
(3–4 coding)
32 bits
53 bits
GND
GND
Figure 7.17
Combining adjacent subchannels in FTC encoding.
TABLe 7.5
Truth Table of FPC 4–5
Data Bits
Code Bits
D3
D2
D1
D0
C4
C3
C2
C1
C0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
0
1
0
0
0
1
1
0
0
0
1
1
0
0
0
1
1
0
1
0
0
0
1
1
0
0
0
1
0
1
0
0
1
1
1
0
1
1
0
0
1
1
1
0
0
1
1
1
0
1
1
1
1
1
0
0
0
1
0
0
0
0
1
0
0
1
1
0
0
0
1
1
0
1
0
1
1
0
0
0
1
0
1
1
1
0
0
1
1
1
1
0
0
1
1
1
0
0
1
1
0
1
1
1
0
0
1
1
1
1
0
1
1
1
1
0
1
1
1
1
1
1
1
1
1
scheme is expressed in Table 7.5 (Pande et al. 2006a). While combining the subchannels, it is ensured that there is no forbidden pattern at the boundaries. As
a result of this, similar to the above two CACs, FPC also adds redundant bits to
the uncoded link and a 32-bit uncoded link is converted to a 54-bit coded link
as shown in Figure 7.18. By contrast, duplication requires a 64-bit link.