Intel® 945G/945GZ/945GC/ 945P/945PL Express Chipset Family ...

Signal Description
2.4 DDR2 DRAM Reference and Compensation
Signal Name Type Description
SRCOMP[1:0] I/O System Memory RCOMP
SOCOMP[1:0] I/O
A
SMVREF[1:0] I
A
DDR2 On-Die DRAM Over Current Detection (OCD) Driver
Compensation
SDRAM Reference Voltage: These signals are reference voltage inputs for
each SDQ_x, SDM_x, SDQS_x, and SDQS_x# input signals.
2.5 PCI Express* Interface Signals (Intel ®
82945G/82945GC/82945P/82945PL Only)
Unless otherwise specified, PCI Express signals are AC coupled, so the only voltage specified is a
maximum 1.2 V differential swing.
Note: PCI Express Interface signals are not on the 82945GZ.
Signal Name Type Description
EXP_RXN[15:0]
EXP_RXP[15:0]
EXP_TXN[15:0]
EXP_TXP[15:0]
I/O
PCIE
O
PCIE
EXP_COMPO I
A
EXP_COMPI I
A
PCI Express* Receive Differential Pair
PCI Express* Transmit Differential Pair
PCI Express* Output Current Compensation
PCI Express* Input Current Compensation
38 Intel ® 82945G/82945GZ/82945GC GMCH and 82945P/82945PL MCH Datasheet