32579B

Core Logic Module - X-Bus Expansion Interface - Function 5

Table 6-40. F5BAR0+I/O Offset: X-Bus Expansion Registers (Continued)

Bit

Description

Offset 08h-0Bh

I/O Control Register 3 (R/W)

Reset Value: 00009000h

 

 

 

 

31:16

Reserved. Write as read.

 

 

 

 

15:13

IO_USB_XCVR_VADJ (USB Voltage Adjustment Connection). These bits connect to the voltage adjustment interface on

the three USB transceivers. Default = 100.

12:8

IO_USB_XCVT_CADJ (USB Current Adjustment). These bits connect to the current adjustment interface on the three

 

USB transceivers. Default = 10000.

7IO_TEST_PORT_EN (Debug Test Port Enable).

0:Disable

1:Enable

6:0

IO_TEST_PORT_REG (Debug Port Pointer). These bits are used to point to the 16-bit slice of the test port bus.

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AMD Geode™ SC1200/SC1201 Processor Data Book

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AMD SC1200, SC1201 manual Three USB transceivers. Default = 128, Iotestporten Debug Test Port Enable, 282