PCI7421 datasheet(235/298 Pages) TI

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10−5

Table 10−4. Page 0 (Port Status) Register Field Descriptions (Continued)

FIELD

SIZE

TYPE

DESCRIPTION

Int_enable

Port event interrupt enable. When the Int_enable bit is set to 1, a port event on the selected port sets the port

event interrupt (Port_event) bit and notifies the link. This bit is cleared to 0 by a system (hardware) reset and

is unaffected by bus reset.

Fault

Fault. This bit indicates that a resume-fault or suspend-fault has occurred on the selected port, and that the

port is in the suspended state. A resume-fault occurs when a resuming port fails to detect incoming cable

bias from its attached peer. A suspend-fault occurs when a suspending port continues to detect incoming

cable bias from its attached peer. Writing 1 to this bit clears the fault bit to 0. This bit is cleared to 0 by system

(hardware) reset and is unaffected by bus reset.

10.3 Vendor Identification Register

The vendor identification page identifies the vendor/manufacturer and compliance level. The page is selected by

writing 1 to the Page_Select field in base register 7. Table 10−5 shows the configuration of the vendor identification

page, and Table 10−6 shows the corresponding field descriptions.

Table 10−5. Page 1 (Vendor ID) Register Configuration

BIT POSITION

ADDRESS

1000

Compliance

1001

Reserved

1010

Vendor_ID[0]

1011

Vendor_ID[1]

1100

Vendor_ID[2]

1101

Product_ID[0]

1110

Product_ID[1]

1111

Product_ID[2]

Table 10−6. Page 1 (Vendor ID) Register Field Descriptions

FIELD

SIZE

TYPE

DESCRIPTION

Compliance

Compliance level. For the PCI7x21/PCI7x11 controller this field is 01h, indicating compliance with IEEE Std

1394a-2000.

Vendor_ID

Manufacturer’s organizationally unique identifier (OUI). For the PCI7x21/PCI7x11 controller this field is

08 0028h (Texas Instruments) (the MSB is at register address 1010b).

Product_ID

Product identifier. For the PCI7x21/PCI7x11 controller this field is 42 4499h (the MSB is at register address

1101b).

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