Datasheet

XIO2213B

SCPS210F –OCTOBER 2008–REVISED MAY 2013

www.ti.com

8.32 Node Identification Register

The node identification register contains the address of the node on which the OHCI-Lynx chip resides,

and indicates the valid node number status. The 16-bit combination of the busNumber field (bits 15-6) and

the NodeNumber field (bits 5-0) is referred to as the node ID. See Table 8-24 for a complete description of

the register contents.

OHCI register offset: E8h

Default value: 0000 FFXXh

BIT NUMBER 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

RESET STATE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

BIT NUMBER 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

RESET STATE 1 1 1 1 1 1 1 1 1 1 X X X X X X

Table 8-24. Node Identification Register Description

BIT FIELD NAME TYPE DESCRIPTION

31 IDValid RU Identification valid. Bit 31 indicates whether or not the controller has a valid node number. It is

cleared when a 1394 bus reset is detected and set to 1b when the controller receives a new node

number from its PHY.

30 root RU Root. Bit 30 is set to 1b during the bus reset process if the attached PHY is root.

29-28 RSVD R Reserved. Bits 29 and 28 return 00b when read.

27 CPS RU Cable power status. Bit 27 is set to 1b if the PHY is reporting that cable power status is OK.

26-16 RSVD R Reserved. Bits 26-16 return 000 0000 0000b when read.

15-6 busNumber RWU Bus number. This field identifies the specific 1394 bus the controller belongs to when multiple 1394-

compatible buses are connected via a bridge. The default value for this field is all 1s.

5-0 NodeNumber RU Node number. This field is the physical node number established by the PHY during self

identification. It is automatically set to the value received from the PHY after the self-identification

phase. If the PHY sets the NodeNumber to 63, software must not set bit 15 (run) in the

asynchronous context control register (see Section 8.40) for either of the AT DMA contexts.

Submit Documentation Feedback

Product Folder Links: XIO2213B