Intel 915GME user manual PCI Express, Pin Description

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.

4.6.2.2PCI 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	REFCLK+	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

	Mobile Intel® 915GME Express Chipset
April 2007	Development Kit User’s Manual
Order Number: 317230-001US	43