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Intel
®
82575EB Gigabit Ethernet Controller — XON Transmitted Count - XONTXC (0404Ch; RC)
Intel
®
82575EB Gigabit Ethernet Controller 324632-003
Software Developer’s Manual and EEPROM Guide Revision: 2.1
420 January 2011
14.9.15 XON Transmitted Count - XONTXC (0404Ch; RC)
This register counts the number of XON packets transmitted. These can be either due to a full queue or
due to software initiated action (using TCTL.SWXOFF). This register only increments if transmits are
enabled.
14.9.16 XOFF Received Count - XOFFRXC (04050h; RC)
This register counts the number of valid XOFF packets received. XOFF packets can use the global
address or the station address. This register only increments if receives are enabled.
14.9.17 XOFF Transmitted Count - XOFFTXC (04054h;
RC)
This register counts the number of XOFF packets transmitted. These can be either due to a full queue or
due to software initiated action (using TCTL.SWXOFF). This register only increments if transmits are
enabled.
14.9.18 FC Received Unsupported Count - FCRUC
(04058h; RC)
This register counts the number of unsupported flow control frames that are received.
The FCRUC counter increments when a flow control packet is received that matches either the reserved
flow control multicast address (in FCAH/L) or the MAC station address, and has a matching flow control
type field match (to the value in FCT), but has an incorrect opcode field. This register only increments if
receives are enabled.
Field Bit(s)
Initial
Value
Description
XONRXC 31:0 0b Number of XON packets received.
Field Bit(s)
Initial
Value
Description
XONTXC 31:0 0b Number of XON packets transmitted.
Field Bit(s)
Initial
Value
Description
XOFFRXC 31:0 0b Number of XOFF packets received.
Field Bit(s)
Initial
Value
Description
XOFFTXC 31:0 0b Number of XOFF packets transmitted.
Field Bit(s)
Initial
Value
Description
FCRUC 31:0 0b Number of unsupported flow control frames received.