7.4.3.1 JESD204B Output Data Formats
Output data are formatted in a specific optimized fashion for each JMODE setting. The following tables show the specific mapping formats for a single frame. In all mappings the tail bits (T) are 0 (zero). In Table 12 to Table 17, the single-channel format samples are defined as Sn, where n is the sample number within the frame. In the dual-channel output formats, the samples are defined as An and Bn, where An are samples from channel A and Bn are samples from channel B. All samples are formatted as MSB first, LSB last.
Table 12. JMODE 4 (8-Bit, Decimate-by-1, Single-Channel, 4 Lanes)
OCTET |
0 |
NIBBLE |
0 |
1 |
DA0 |
S0 |
DA1 |
S2 |
DB0 |
S1 |
DB1 |
S3 |
Table 13. JMODE 5 (8-Bit, Decimate-by-1, Single-Channel, 8 Lanes)
OCTET |
0 |
NIBBLE |
0 |
1 |
DA0 |
S0 |
DA1 |
S2 |
DA2 |
S4 |
DA3 |
S6 |
DB0 |
S1 |
DB1 |
S3 |
DB2 |
S5 |
DB3 |
S7 |
Table 14. JMODE 6 (8-Bit, Decimate-by-1, Dual-Channel, 4 Lanes)
OCTET |
0 |
NIBBLE |
0 |
1 |
DA0 |
A0 |
DA1 |
A1 |
DB0 |
B0 |
DB1 |
B1 |
Table 15. JMODE 7 (8-Bit, Decimate-by-1, Dual-Channel, 8 Lanes)
OCTET |
0 |
NIBBLE |
0 |
1 |
DA0 |
A0 |
DA1 |
A1 |
DA2 |
A2 |
DA3 |
A3 |
DB0 |
B0 |
DB1 |
B1 |
DB2 |
B2 |
DB3 |
B3 |
Table 16. JMODE 17 (8-bit, Decimate-by-1, Single-Channel, 16 lanes)
OCTET |
0 |
NIBBLE |
0 |
1 |
DA0 |
S0 |
DA1 |
S2 |
DA2 |
S4 |
DA3 |
S6 |
DA4 |
S8 |
DA5 |
S10 |
DA6 |
S12 |
DA7 |
S14 |
DB0 |
S1 |
DB1 |
S3 |
DB2 |
S5 |
DB3 |
S7 |
DB4 |
S9 |
DB5 |
S11 |
DB6 |
S13 |
DB7 |
S15 |
Table 17. JMODE 18 (8-Bit, Decimate-by-1, Dual-Channel, 16 Lanes)
OCTET |
0 |
NIBBLE |
0 |
1 |
DA0 |
A0 |
DA1 |
A1 |
DA2 |
A2 |
DA3 |
A3 |
DA4 |
A4 |
DA5 |
A5 |
DA6 |
A6 |
DA7 |
A7 |
DB0 |
B0 |
DB1 |
B1 |
DB2 |
B2 |
DB3 |
B3 |
DB4 |
B4 |
DB5 |
B5 |
DB6 |
B6 |
DB7 |
B7 |