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
A13
B13
GND
A14
REFCLK-
B14
LANE 0 (T+)
A15
GND
B15
LANE 0 (T-)
A16
LANE 0 (R+)
B16
GND
A17
LANE 0 (R-)
B17
PRSNT2*
A18
GND
B18
GND
A19
RSVD
B19
LANE 1 (T+)
A20
GND
B20
LANE 1 (T-)
A21
LANE 1 (R+)
B21
GND
A22
LANE 1 (R-)
B22
GND
A23
GND
B23
LANE 2 (T+)
A24
GND
B24
LANE 2 (T-)
A25
LANE 2 (R+)
B25
GND
A26
LANE 2 (R-)
B26
GND
A27
GND
B27
LANE 3 (T+)
A28
GND
B28
LANE 3 (T-)
A29
LANE 3 (R+)
B29
GND
