NXP Semiconductors MPC5746R - Page 29

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MPC5746R Hardware Design Guide, Rev. 1
NXP Semiconductors 29
The Samtec ERF8 series of connectors is intended for high speed applications requiring a minimum
footprint size with a reliable, latching connection. The recommended connector has two rows of seventeen
contacts each with a spacing of 0.8 mm. The connector provides isolation between the high-speed trace
signals and the low-speed JTAG and control signals. It also provides ample ground connections to ensure
signal integrity. If at all possible, the connector should be placed onto the target system with the even
numbered pins nearest the edge of the printed circuit board. Figure is courtesy of Samtec U.S.A
(http://www.samtec.com/search/NEXUS.aspx).
Figure 17. Recommended Nexus connector
Table 15 shows the recommended pin-out for Samtec connector.
Table 15. MPC5746R high-speed serial trace connector
Function Pin No Pin No Function
VSS GND GND VSS
TX0+ 1 2 VREF
TX0- 3 4 TCK/TCKC
VSS 5 6 TMS/TMSC
TX1+ 7 8 TDI
TX1- 9 10 TDO
VSS 11 12 JCOMP
TX2+ 13 14 EVTI1
TX2- 15 16 EVTI0
VSS 17 18 EVTO0
TX3+ 19 20 PORST
TX3- 21 22 RESET
VSS 23 24 VSS
(TX4+)
1
25 26 CLK+
(TX4-)
1
27 28 CLK-