Host Controller Data Manual

4–23

4.27 Fairness Control Register

The fairness control register provides a mechanism by which software can direct the host controller to transmit

multiple asynchronous requests during a fairness interval. See Table 4–18 for a complete description of the register

contents.

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

Name Fairness control

Type R R R R R R R R R R R R R R R R

Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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

Name Fairness control

Type R R R R R R R R R/W R/W R/W R/W R/W R/W R/W R/W

Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Type: Read-only, Read/Write

Offset: DCh

Default: 0000 0000h

Table 4–18. Fairness Control Register Description

BIT FIELD NAME TYPE DESCRIPTION

31–8 RSVD R Reserved. Bits 31–8 return 0s when read.

7–0 pri_req R/W

This field specifies the maximum number of priority arbitration requests for asynchronous request

packets that the link is permitted to make of the PHY during a fairness interval.