Circuit Implementations
10.2Intel® 41210 Serial to Parallel PCI Bridge Reference and Compensation Pins
There are three compensation pins on Intel® 41210 Serial to Parallel PCI Bridge.
PE_RCOMP[1:0] are two separate pins that provide voltage compensation for the PCI Express interface on the Intel® 41210 Serial to Parallel PCI Bridge. The nominal compensation voltage is 0.5V. An external 24.9Ω ±1% pullup resistor should be used to connect to VCC15. A single pullup resistor can be used to for both of these signals.
RCOMP is an analog PCI interface compensation pin, providing 0.75V to the Intel® 41210 Serial to Parallel PCI Bridge. A 100Ω ±1% pulldown resistor should be used to connect the RCOMP pin to ground.
These implementations are shown in Figure 26.
Figure 26. Reference and Compensation Circuit Implementations
VCC
R1 = 24.9 Ω – 1%
0.5 V
0.5 V
0.75 V
R3 = 100 Ω – 1%
Intelfi 41210
Bridge
PE_RCOMP[0]
PE_RCOMP[1]
RCOMP
B2727
Intel® 41210 Serial to Parallel PCI Bridge Design Guide | 53 |