Mobile Intel® 915GME Express Chipset
April 2007 Development Kit User’s Manual
Order Number: 317230-001US 43
Hardware Reference—Mobile Intel® 915GME Express Chipset
into the socket, turn the screw 180 degrees clock-wise to secure the CPU in the socket.
Note that the slot on the screw aligns with the lock and unlock legend on the case of
the CPU socket.
Caution: Please refer to the CPU installation instruction in Appendix A prior to inserting the CPU
as the CPU and socket can be easily damaged.
4.6.2.2 PCI Express (x16)The platform has one 16 lane PCI Express Graphics slot and supports either x1 or x16
modes. The slot is wired “lane reversed” which connects the Mobile Intel® 915GME
Express Chipset lanes 0 through 15 to lanes 15 through 0 on the slot. The Mobile Intel®
915GME Express Chipset will internally un-reverse this wiring since its CFG9 power-on
strap is tied low.
Table 13. PCI Express (x16) Pinout (J6C1) (Sheet 1 of 3)
Pin Description Pin Description
A1 PRSNT1# B1 +12 V
A2 +12 V B2 +12 V
A3 +12 V B3 RSVD
A4 GND B4 GND
A5 (JTAG) TCK B5 SMCLK
A6 (JTAG) TDI B6 SMDAT
A7 (JTAG) TDO B7 GND
A8 (JTAG) TMS B8 +3.3 V
A9 +3.3 V B9 (JTAG) TRST#
A10 +3.3 V B10 +3.3 VAUX
A11 PERST# B11 WAKE#
A12 GND B12 RSVD
A13REFCLK+ B13GND
A14REFCLK- B14LANE 0 (T+)
A15GND B15LANE 0 (T-)
A16 LANE 0 (R+) B16 GND
A17 LANE 0 (R-) B17 PRSNT2*
A18GND B18GND
A19 RSVD B19 LANE 1 (T+)
A20GND B20LANE 1 (T-)
A21 LANE 1 (R+) B21 GND
A22 LANE 1 (R-) B22 GND
A23GND B23LANE 2 (T+)
A24GND B24LANE 2 (T-)
A25 LANE 2 (R+) B25 GND
A26 LANE 2 (R-) B26 GND
A27GND B27LANE 3 (T+)
A28GND B28LANE 3 (T-)
A29 LANE 3 (R+) B29 GND