JESD204C Transport Layer Data Formate

The ADC core output samples are formatted in a specific fashion for each JMODE setting based on the transport layer settings for that JMODE. The following tables show the specific mapping formats for a single frame for each JMODE. The symbol definitions used in the JMODE tables is provided in Table 6- 17. In all mappings the tail bits (T) are 0 (zero). All samples are formatted as MSB first, LSB last.

Table 6-17. JMODE Table Symbol Definitions
NOTATION	DESCRIPTION
An	Sample n from channel A
Bn	Sample n from channel B
Cn	Sample n from channel C
Dn	Sample n from channel D
T	Tail bits, always set to 0

JMODE 0 (12-bit, 8/4/2 lanes, 8B/10B)

Table 6-18. JMODE 0 (12-bit, 8/4/2 lanes, 8B/10B)
OCTET	0		1		2		3		4		5		6		7
NIBBLE	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
D0	A₀			A₂			A₄			A₆			A₈			T
D1	A₁			A₃			A₅			A₇			A₉			T
D2	B₀			B₂			B₄			B₆			B₈			T
D3	B₁			B₃			B₅			B₇			B₉			T
D4 (Quad only)	C₀			C₂			C₄			C₆			C₈			T
D5 (Quad only)	C₁			C₃			C₅			C₇			C₉			T
D6 (Quad only)	D₀			D₂			D₄			D₆			D₈			T
D7 (Quad only)	D₁			D₃			D₅			D₇			D₉			T

JMODE 1 (12-bit, 6/3/2 lanes, 8B/10B)

Table 6-19. JMODE 1 (12-bit, 6/3/2 lanes, 8B/10B)
OCTET	0		1
NIBBLE	0	1	2	3
D0	A₀[11:0]			A₁[11:8]
D1	A₁[7:0]		B₀[11:4]
D2	B₀[3:0]	B₁[11:0]
D3	C₀[11:0]			C₁[11:8]
D4	C₁[7:0]		D₀[11:4]
D5	D₀[3:0]	D₁[11:0]

JMODE 2 (8-bit, 4/2/1 lanes, 8B/10B)

This table for JMODE 2 is a simplified mapping where the 8-bit samples ( $A_0, B_0$ , etc.) span both nibbles (0 and 1) of a single octet.

Here is the HTML code for this table:

Table 6-20. JMODE 2 (8-bit, 4/2/1 lanes, 8B/10B)
OCTET	0
NIBBLE	0	1
D0	A₀
D1	B₀
D2	C₀
D3	D₀

JMODE 3 (10-bit, 4/2/1 lanes, 8B/10B)

Table 6-21. JMODE 3 (10-bit, 4/2/1 lanes, 8B/10B)
OCTET	0		1			2		3			4
NIBBLE	0	1	2		3	4	5	6	7		8	9
D0	A₀			A₁			A₂			A₃
D1	B₀			B₁			B₂			B₃
D2	C₀			C₁			C₂			C₃
D3	D₀			D₁			D₂			D₃

JMODE 4 (12-bit, 3/2/1 lanes, 64B/66B)

Table 6-22. JMODE 4 (12-bit, 3/2/1 lanes, 64B/66B)
OCTET	0		1
NIBBLE	0	1	2	3
D0		A₀[11:0]		B₀[11:8]
D1	B₀[7:0]		C₀[11:4]
D2	C₀[3:0]	D₀[11:0]

JMODE 5 (8-bit, 2/1/1 lanes, 64B/66B)

Table 6-23. JMODE 5 (8-bit, 2/1/1 lanes, 64B/66B)
OCTET	0		1
NIBBLE	0	1	3	4
D0	A₀		B₀
D1	C₀		D₀

JMODE 6 (12-bit, 6/3/2 lanes, 64B/66B)

Table 6-24. JMODE 6 (12-bit, 6/3/2 lanes, 64B/66B)
OCTET	0		1
NIBBLE	0	1	2	3
D0	A₀[11:0]			A₁[11:8]
D1	A₁[7:0]		B₀[11:4]
D2	B₀[3:0]	B₁[11:0]
D3	C₀[11:0]			C₁[11:8]
D4	C₁[7:0]		D₀[11:8]
D5	D₀[3:0]	D₁[11:0]

JMODE 7 (8-bit, 4/2/1 lanes, 64B/66B)

Table 6-25. JMODE 7 (8-bit, 4/2/1 lanes, 64B/66B)
OCTET	0
NIBBLE	0	1
D0	A₀
D1	B₀
D2	C₀
D3	D₀

JMODE 8 (12-bit, 4/2/1 lanes, 64B/66B)

Table 6-26. JMODE 8 (12-bit, 4/2/1 lanes, 64B/66B)
OCTET	0		1		2
NIBBLE	0	1	2	3	4	5
D0	A₀[11:0]			A₁[11:8]
D1	A₁[7:0]			B₀[11:8]
D2	B₀[7:0]			C₀[11:8]
D3	C₀[7:0]			D₀[11:8]

JMODE 9 (8-bit, 8/4/2lanes, 8B/10B)

Table 6-27. JMODE 9 (8-bit, 8/4/2lanes, 8B/10B)
OCTET	0
NIBBLE	0	1
D0	A₀
D1	A₁
D2	B₀
D3	B₁
D4	C₀
D5	C₁
D6	D₀
D7	D₁

JMODE 10 (10-bit, 8/4/2 lanes, 8B/10B)

Table 6-28. JMODE 10 (10-bit, 8/4/2 lanes, 8B/10B)
OCTET	0		1			2		3			4
NIBBLE	0	1	2		3	4	5	6	7		8	9
D0	A₀			A₂			A₄			A₆
D1	A₁			A₃			A₅			A₇
D2	B₀			B₂			B₄			B₆
D3	B₁			B₃			B₅			B₇
D4	C₀			C₂			C₄			C₆
D5	C₁			C₃			C₅			C₇
D6	D₀			D₂			D₄			D₆
D7	D₁			D₃			D₅			D₇

JMODE 11 (12-bit, Dual/Single channel only, 8/4 lanes, 8B/10B)

Table 6-29. JMODE 11 (12-bit, Dual/Single channel only, 8/4 lanes, 8B/10B)
OCTET	0		1		2		3		4		5		6		7
NIBBLE	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
D0	A₀			A₄			A₈			A₁₂			A₁₆			T
D1	A₁			A₅			A₉			A₁₃			A₁₇			T
D2	A₂			A₆			A₁₀			A₁₄			A₁₈			T
D3	A₃			A₇			A₁₁			A₁₅			A₁₉			T
D4	B₀			B₄			B₈			B₁₂			B₁₆			T
D5	B₁			B₅			B₉			B₁₃			B₁₇			T
D6	B₂			B₆			B₁₀			B₁₄			B₁₈			T
D7	B₃			B₇			B₁₁			B₁₅			B₁₉			T

JMODE 12 (8-bit, Dual/Single channel only, 8/4 lanes, 64B/66B)

Table 6-30. JMODE 12 (8-bit, Dual/Single channel only, 8/4 lanes, 64B/66B)
OCTET	0
NIBBLE	0	1
D0	A₀
D1	A₁
D2	A₂
D3	A₃
D4	B₀
D5	B₁
D6	B₂
D7	B₃

JMODE 13 (10-bit, Dual/Single channel only, 8/4lanes, 8B/10B)

Table 6-31. JMODE 13 (10-bit, Dual/Single channel only, 8/4lanes, 8B/10B)
OCTET	0		1			2		3			4
NIBBLE	0	1	2		3	4	5	6	7		8	9
D0	A₀			A₄			A₈			A₁₂
D1	A₁			A₅			A₉			A₁₃
D2	A₂			A₆			A₁₀			A₁₄
D3	A₃			A₇			A₁₁			A₁₅
D4	B₀			B₄			B₈			B₁₂
D5	B₁			B₅			B₉			B₁₃
D6	B₂			B₆			B₁₀			B₁₄
D7	B₃			B₇			B₁₁			B₁₅

JMODE 14 (12-bit, 8/4/2 lanes, 64B/66B)

Table 6-28. JMODE 14 (12-bit, 8/4/2 lanes, 64B/66B)
OCTET	0		1		2
NIBBLE	0	1	2	3	4	5
D0	A₀			A₂
D0	A₁			A₃
D2	B₀			B₂
D3	B₁			B₃
D4	C₀			C₂
D5	C₁			C₃
D6	D₀			D₂
D7	D₁			D₃

JMODE 15 (12-bit, Dual/Single channel only, 8/4 lanes, 64B/66B)

Table 6-29. JMODE 15 (12-bit, Dual/Single channel only, 8/4 lanes, 64B/66B)
OCTET	0		1		2
NIBBLE	0	1	2	3	4	5
D0	A₀			A₄
D1	A₁			A₅
D2	A₂			A₆
D3	A₃			A₇
D4	B₀			B₄
D5	B₁			B₅
D6	B₂			B₆
D7	B₃			B₇

JMODE 0 (12-bit, 8/4/2 lanes, 8B/10B)​

JMODE 1 (12-bit, 6/3/2 lanes, 8B/10B)​

JMODE 2 (8-bit, 4/2/1 lanes, 8B/10B)​

JMODE 3 (10-bit, 4/2/1 lanes, 8B/10B)​

JMODE 4 (12-bit, 3/2/1 lanes, 64B/66B)​

JMODE 5 (8-bit, 2/1/1 lanes, 64B/66B)​

JMODE 6 (12-bit, 6/3/2 lanes, 64B/66B)​

JMODE 7 (8-bit, 4/2/1 lanes, 64B/66B)​

JMODE 8 (12-bit, 4/2/1 lanes, 64B/66B)​

JMODE 9 (8-bit, 8/4/2lanes, 8B/10B)​

JMODE 10 (10-bit, 8/4/2 lanes, 8B/10B)​

JMODE 11 (12-bit, Dual/Single channel only, 8/4 lanes, 8B/10B)​

JMODE 12 (8-bit, Dual/Single channel only, 8/4 lanes, 64B/66B)​

JMODE 13 (10-bit, Dual/Single channel only, 8/4lanes, 8B/10B)​

JMODE 14 (12-bit, 8/4/2 lanes, 64B/66B)​

JMODE 15 (12-bit, Dual/Single channel only, 8/4 lanes, 64B/66B)​