Intel IXF1104 manual Pause Threshold $ Port_Index + 0x0E, Max Frame Size Addr: Port_Index + 0x0F

IXF1104 4-Port Gigabit Ethernet Media Access Controller

Table 80. Pause Threshold ($ Port_Index + 0x0E)

Name	Description	Address	Type1	Default
	When a pause frame has been sent, an internal
	timer checks when the next pause frame must
	be scheduled for transmission to keep the link
	partner in pause mode (this is required only if
Pause	the flow control has to be extended for one more	Port_Index	R/W	0x0000002F
	session). The pause threshold value is a 16-bit
Threshold		+ 0x0E
	value that sets the time in terms of 512-bit
	quantum after the previous pause frame when
	the next pause frame has to be sent. This
	ensures that the link partner is kept in pause
	mode continuously.

1. RO = Read Only, No clear on Read; R = Read, Clear on Read; W = Write only; R/W = Read/Write, No clear; R/W/C = Read/Write, Clear on Write

Table 81. Max Frame Size (Addr: Port_Index + 0x0F)

Name	Description	Address	Type1	Default
	This is a 14-bit value configuring the maximum
	frame size the MAC can receive or transmit
	without activating any error counters, and
	without truncation.
	This value is excluding the 4-byte CRC in the	Port_Inde	R/W	0x000005EE
Max Frame Size	transmit direction when CRC append is
		x + 0x0F
	enabled in the MAC. Hence, this value has to
	be set four bytes less when CRC append is
	enabled in the MAC.
	The maximum frame size is internally adjusted
	by +4 if the frame is VLAN tagged.

1.RO = Read Only, No clear on Read; R = Read, Clear on Read; W = Write only; R/W = Read/Write, No clear; R/W/C = Read/Write, Clear on Write

Datasheet 165

Document Number: 278757

Revision Number: 007

Revision Date: March 25, 2004