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Signal Integrity Considerations
Traces of differential signals pairs are NOT routed symmetrically (as symmetric pairs).
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Traces of differential signals pairs are NOT routed with equal length. For applications where traces length has to be matched or timing differences have to be compensated, The tables below list the trace length of I/O signal lines measured from FPGA balls to B2B connector pins.
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Traces of differential signals pairs are routed with a differential impedance between the two traces of 60 ohm.
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Pairs of pins that form a differential I/O pair appear colored together in the table. An electronic version of these pin-out tables are available for download from the Trenz Electronic support area of the web site.
Connector JM4: Signals Trace Lengths
| Scroll pdf title |
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| title | Trace length of signal pins of B2B connector JM4 |
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len.
mm | FPGA
pin | FPGA
ball | JM4
signal | JM4
pin
| JM4
pin | JM4
signal | FPGA
ball | FPGA
pin | len.
mm | | | | | | 1 | 2 | | | | | | 26 | IO_L20P_0 | F15 | JM4-IO01 | 3 | 4 | | | | | | 29 | IO_L21N_0 | C16 | JM4-IO02 | 5 | 6 | | | | | | | | | | 7 | 8 | JM4-IO34 | K12 | IO_L39N_0 | 29 | | 26 | IO_L21P_0 | D17 | JM4-IO03 | 9 | 10 | JM4-IO35 | J12 | IO_L39P_0 | 26 | | 24 | IO_L22N_0 | C15 | JM4-IO04 | 11 | 12 | JM4-IO36 | D8 | IO_L40N_0 | 26 | | 26 | IO_L22P_0 | D16 | JM4-IO05 | 13 | 14 | JM4-IO37 | C8 | IO_L40P_0 | 24 | | 21 | IO_L23N_0 | A15 | JM4-IO06 | 15 | 16 | | | | | | 20 | IO_L23P_0 | B15 | JM4-IO07 | 17 | 18 | JM4-IO38 | C6 | IO_L41N_0 | 24 | | 22 | IO_L24N_0 | F14 | JM4-IO08 | 19 | 20 | JM4-IO39 | B6 | IO_L41P_0 | 24 | | 18 | IO_L24P_0 | E14 | JM4-IO09 | 21 | 22 | JM4-IO40 | C7 | IO_L42N_0 | 23 | | | | | | 23 | 24 | JM4-IO41 | B7 | IO_L42P_0 | 19 | | 20 | IO_L25N_0
GCLK5 | J14 | JM4-IO10 | 25 | 26 | JM4-IO42 | K11 | IO_L43N_0 | 24 | | 21 | IO_L25P_0
GCLK4 | K14 | JM4-IO11 | 27 | 28 | JM4-IO43 | J11 | IO_L43P_0 | 23 | | 11 | IO_L26N_0
GCLK7 | A14 | JM4-IO12 | 29 | 30 | | | | | | 11 | IO_L26P_0
GCLK6 | B14 | JM4-IO13 | 31 | 32 | JM4-IO44 | D6 | IO_L44N_0 | 15 | | 17 | IO_L27N_0
GCLK9 | G13 | JM4-IO14 | 33 | 34 | JM4-IO45 | C5 | IO_L44P_0 | 14 | | 16 | IO_L27P_0
GCLK8 | F13 | JM4-IO15 | 35 | 36 | JM4-IO46 | B4 | IO_L45N_0 | 15 | | | | | | 37 | 38 | JM4-IO47 | A4 | IO_L45P_0 | 14 | | 13 | IO_L28N_0
GCLK11 | C13 | JM4-IO16 | 39 | 40 | JM4-IO48 | H10 | IO_L46N_0 | 14 | | 12 | IO_L28P_0
GCLK10 | B13 | JM4-IO17 | 41 | 42 | JM4-IO49 | G10 | IO_L46P_0 | 14 | | 14 | IO_L29N_0 | B12 | JM4-IO18 | 43 | 44 | | | | | | 14 | IO_L29P_0 | A12 | JM4-IO19 | 45 | 46 | JM4-IO50 | H9 | IO_L47N_0 | 15 | | 27 | IO_L30N_0 | C12 | JM4-IO20 | 47 | 48 | JM4-IO51 | G9 | IO_L47P_0 | 14 | | 30 | IO_L30P_0 | D13 | JM4-IO21 | 49 | 50 | JM4-IO52 | E7 | IO_L48N_0 | 13 | | | | | | 51 | 52 | JM4-IO53 | F7 | IO_L48P_0 | 15 | | 20 | IO_L33N_0 | B10 | JM4-IO22 | 53 | 54 | JM4-IO54 | B3 | IO_L51N_0 | 9 | | 17 | IO_L33P_0 | A10 | JM4-IO23 | 55 | 56 | JM4-IO55 | A3 | IO_L51P_0 | 9 | | 20 | IO_L34N_0 | D10 | JM4-IO24 | 57 | 58 | | | | | | 21 | IO_L34P_0 | C10 | JM4-IO25 | 59 | 60 | JM4-IO56 | C23 | IO_L06N_0 | 36 | | 29 | IO_L35N_0 | H12 | JM4-IO26 | 61 | 62 | JM4-IO57 | D23 | IO_L06P_0 | 42 | | 30 | IO_L35P_0 | G12 | JM4-IO27 | 63 | 64 | JM4-IO58 | A22 | IO_L07N_0 | 36 | | | | | | 65 | 66 | JM4-IO59 | B23 | IO_L07P_0 | 41 | | 27 | IO_L36N_0 | B9 | JM4-IO28 | 67 | 68 | JM4-IO60 | G17 | IO_L08N_0 | 36 | | 27 | IO_L36P_0 | A9 | JM4-IO29 | 69 | 70 | JM4-IO61 | H17 | IO_L08P_0 | 39 | | 28 | IO_L37N_0 | D9 | JM4-IO30 | 71 | 72 | | | | | | 34 | IO_L37P_0 | E10 | JM4-IO31 | 73 | 74 | | | | | | 29 | IO_L38N_0 | B8 | JM4-IO32 | 75 | 76 | | | | | | 28 | IO_L38P_0 | A8 | JM4-IO33 | 77 | 78 | | | | | | | | | | 79 | 80 | | | | |
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