Intel IXF1104 5.11Loopback Modes, 5.10.3ID Register, 5.10.4Boundary Scan Register, Datasheet

Models: IXF1104

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5.10.3ID Register

IXF1104 Quad-Port 10/100/1000 Mbps Ethernet Media Access Controller

5.10.3ID Register

The ID register is a 32-bit register. The IDCODE instruction connects this register between TDI and TDO. See Table 112 “JTAG ID ($0x50C)” on page 191 for detailed information.

5.10.4Boundary Scan Register

The Boundary Scan register is a shift register made up of all the boundary scan cells associated with the device signals. The number, type, and order of the boundary scan cells are specified in the IXF1104 BSDL file. The EXTEST and SAMPLE instructions connect this register between TDI and TDO.

5.10.5Bypass Register

The Bypass register is a 1-bit register that bypasses the IXF1104 to reduce the JTAG chain length when accessing other devices on the chain besides the IXF1104. The BYPASS, HIGHZ, and CLAMP instructions connect this register between TDI and TDO.

5.11Loopback Modes

The IXF1104 provides two loopback modes for device diagnostic testing when it has been integrated into a user system. A line-side loopback allows the line-side receive interface to be looped back to the transmit line-side interface. A SPI3 loopback mode allows the SPI3 transmit interface to be looped back to the SPI3 receive interface.

5.11.1SPI3 Interface Loopback

To provide a diagnostic loopback feature on the SPI3 interface, it is possible to configure the IXF1104 to loop back any data written to the IXF1104 through the SPI3 transmit interface back to the SPI3 receive interface. This is accomplished using the data path shown in Figure 33.

Note: Loopback packets also appear on the line side TX interface.

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Datasheet

Document Number: 278757

Revision Number: 007

Revision Date: March 25, 2004

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Intel IXF1104 manual 5.11Loopback Modes, 5.10.3ID Register, 5.10.4Boundary Scan Register, 5.10.5Bypass Register, Datasheet