MPC8572ECLPXATLD datasheet(133/140 Pages) FREESCALE

133 / 140 page

MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

133

System Design Information

21.10 Guidelines for High-Speed Interface Termination

21.10.1 SerDes 1 Interface Entirely Unused

If the high-speed SerDes 1 interface is not used at all, the unused pin should be terminated as described in

this section.

The following pins must be left unconnected (float):

•

SD1_TX[7:0]

•

SD1_TX[7:0]

•

Reserved pins C24, C25, H26, H27

The following pins must be connected to XGND_SRDS1:

•

SD1_RX[7:0]

•

SD1_RX[7:0]

•

SD1_REF_CLK

•

SD1_REF_CLK

Pins K32 and C29 must be tied to XVDD_SRDS1. Pins K31 and C30 must be tied to XGND_SRDS1

through a 300-

Ω resistor.

The POR configuration pin cfg_srds1_en on TSEC2_TXD[5] can be used to power down SerDes 1 block

for power saving. Note that both SVDD_SRDS1 and XVDD_SRDS1 must remain powered.

21.10.2 SerDes 1 Interface Partly Unused

If only part of the high speed SerDes 1 interface pins are used, the remaining high-speed serial I/O pins

should be terminated as described in this section.

The following pins must be left unconnected (float) if not used:

•

SD1_TX[7:0]

•

SD1_TX[7:0]

•

Reserved pins: C24, C25, H26, H27

The following pins must be connected to XGND_SRDS1 if not used:

•

SD1_RX[7:0]

•

SD1_RX[7:0]

Pins K32 and C29 must be tied to XVDD_SRDS1. Pins K31 and C30 must be tied to XGND_SRDS1

through a 300-

Ω resistor.

21.10.3 SerDes 2 Interface (SGMII) Entirely Unused

If the high-speed SerDes 2 interface (SGMII) is not used at all, the unused pin should be terminated as

described in this section.

The following pins must be left unconnected (float):

MPC8572ECLPXATLD датащи(PDF) 133 Page - Freescale Semiconductor, Inc

MPC8572ECLPXATLD датащи(HTML) 133 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL