Marvel Group Integrated Controller 88F6281 - Manual (Page 49)

Unused Interface Strapping
Copyright © 2008 Marvell Doc. No. MV-S104859-U0 Rev. E
December 2, 2008, Preliminary Document Classification: Proprietary Information Page 49
2
Unused Interface Strapping
Table 24 lists the signal strapping to be used for systems in which some of the device interfaces are unused (not
connected).
Table 24: Unused Interface Strapping
U n u s e d I n t e r f a c e St r a p p i n g
Ethernet SMI Pull up GE_MDIO.
MPP Configure any unused MPP pin to GPIO output.
Leave the power supply connected.
• If the related power supply is VDDO, leave it connected to 3.3V.
• If the related power supply is VDD_GE_B, leave it connected to either 3.3V or 1.8V.
USB Discard the power filter.
Leave USB_AVDD connected to 3.3V.
All other signals can be left unconnected.
PCI Express Discard the analog power filters.
Leave PEX_AVDD connected to 1.8V.
Pull down the PEX_CLK_N signal through a 50 k
Ω
resistor to GND.
Pull up the PEX_CLK_P signal through a 16 k
Ω
resistor to 1.8V.
All other signals can be left unconnected.
Configure the PEX_CLK_P and PEX_CLK_N signals as inputs, as indicated in
Table 32,
Reset Configuration, on page 67 .
SATA Discard the analog power filters.
SATA0_AVDD/SATA1_AVDD can be left unconnected.
RTC Connect RTC_AVDD, RTC_AVSS, RTC_XIN, and RTC_XOUT to GND.
SSCG Discard the power filter.
Leave SSCG_AVDD connected to 1.8V.
eFuse Connect VHV to VDD