Texas Instruments PCI2250, Руководство пользователя, Страница: 14 / 28

Board Jumpers
4-2
4.1 Board Jumpers
Built into the evaluation board is the ability to monitor and test all the
capabilities of the PCI2250. There are many jumpers located on the evaluation
board (J1 through J12), which allow an engineer to perform tests ranging from
measuring power to changing the arbitration of the PCI2250. All of these
jumpers are defined in Table 4–1.
Table 4–1. Jumper Definitions
Jumper Description
J1 P_MFUNC select. This jumper is used to select whether to route
P_MFUNC to P_LOCK or P_CLKRUN/HS_ENUM.
J5 & J6 Jumpers J5 and J6 are used to control the mode select inputs to the
PCI2250.
J7 S_MFUNC select. This jumper is used to select whether to route
S_MFUNC to S_LOCK or S_CLKRUN/HS_SWITCH.
J8 Arbitration support. By cutting the trace across this jumper and installing
R10 an external arbiter can be used.
J9 S_VCCP for the PCI2250. This jumper can be used to measure the power
consumed through the S_VCCP.
J10 P_VCCP for the PCI2250. This jumper can be used to measure the power
consumed through the P_VCCP.
J11 Core VCC for the PCI2250. This jumper can be used to measure the
power consumed by the PCI2250 core logic.
J12 S_VIO select. This jumper is used to select between 3.3-V and 5.0-V
signaling environments on the secondary bus.