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Software Developer’s Manual 281
Register Descriptions
Table 13-56. VET Register Bit Description
13.4.12 Flow Control Transmit Timer Value
FCTTV (00170h; R/W)
Provides the Pause slot time value to be included in the transmitted XOFF Pause packets.
The slot time value that is used is a fixed slot of 64-byte time.
Table 13-57. FCTTV Register Bit Description
31 16 15 0
Reserved VET
Field Bit(s)
Initial
Value
Description
VET 15:0 X
VLAN EtherType
Should be programmed with 8100h.
Reserved 31:16 0b
Reserved
Reads as 0b.
31 16 15 0
Reserved TTV
Field Bit(s)
Initial
Value
Description
TTV 15:0 X
Transmit Timer Value
Slot time value (Slot time value is 64-byte time) to be inserted into
the transmitted Pause frame. If software wishes to send XON
frame, it should set the FCTTV. TTV value to 0b prior to initializing
the Pause frame.
Reserved 31:16 0b
Reserved
Reads as 0b.
Should be written to 0b for future compatibility.