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Intel® 41210 Serial to Parallel PCI Bridge Design Guide 53

Circuit Implementations

10.2 Intel® 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 24.9

Ω ±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 100

Ω ±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

B2727 -01

PE_RCOMP[0]

Intel

ﬁ

41210

Bridge

PE_RCOMP[1]

RCOMP

R3 = 100 Ω – 1%

R1 = 24.9 Ω – 1%

0.75 V

0.5 V

VCC

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Intel 41210 Manual do Utilizador Página 53