TX Arbiter Idle Slope Control Register - 9.0 English

Tri-Mode Ethernet MAC LogiCORE IP Product Guide (PG051)

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The idleSlope variable is defined in IEEE802.1Qav-2009 to be the rate of change of credit in bits per second when the value of credit is increasing (whenever there is no AV packet transmission). The TX Arbiter Send Slope Control Register, RTC Nanoseconds Field Offset Control, and RTC Seconds Field Offset Control registers define the maximum limit of the bandwidth reserved for AV traffic, as enforced by the TX Arbiter. The default values allow the maximum bandwidth proportion of 75% for the AV traffic. See the IEEE 802.3-2008 specification for further information.

Table 1. TX Arbiter Idle Slope Control Register (0x12010)
Bits Default Value Type Description
31:20 0 RO Reserved
19:0 6144 R/W Value of idleSlope