Datasheet

1394 PHY Configuration Space
170
March 5 2007 − June 2011SCPS154C
10 1394 PHY Configuration Space
There are 16 accessible internal registers in the controller. The configuration of the registers at addresses 0h
through 7h (the base registers) is fixed, whereas the configuration of the registers at addresses 8h through
Fh (the paged registers) is dependent upon which 1 of 8 pages, numbered 0h through 7h, is currently selected.
The selected page is set in base register 7h.
10.1 Base Registers
Table 10−1 shows the configuration of the base registers, and Table 10−2 shows the corresponding field
descriptions. The base register field definitions are unaffected by the selected page number.
A reserved register or register field (marked as Reserved in the following register configuration tables) is read
as 0, but is subject to future usage. All registers in address pages 2 through 6 are reserved.
Table 10−1. Base Register Configuration
ADDRESS
BIT POSITION
ADDRESS
0 1 2 3 4 5 6 7
0000 Physical ID R CPS
0001 RHB IBR Gap_Count
0010 Extended (111b) Reserved Total_Ports (0010b)
0011 Max_Speed (010b) Reserved Delay (0000b)
0100 LCtrl C Jitter (000b) Pwr_Class
0101 Watchdog ISBR Loop Pwr_fail Timeout Port_event Enab_accel Enab_multi
0110 Reserved
0111 Page_Select Reserved Port_Select
Not Recommended for New Designs