User's Manual

RTL8187B
Datasheet
Wireless LAN Network Interface Controller
28
Track ID: JATR-1076-21 Rev. 1.0
Table 30. Rx Status Descriptor
Offset# Bit# Symbol Description
0 31 OWN Ownership.
When set, this bit indicates that the descriptor is owned by the NIC. When clear, it
indicates that the descriptor is owned by the host system. The NIC clears this bit
when the related buffer data has been transmitted. In this case, OWN=0.
0 30 DMA_OK DMA Okay.
0 29 FS First Segment Descriptor.
When set, this bit indicates that this is the first descriptor of a Tx packet, and that
this descriptor is pointing to the first segment of the packet.
0 28 LS Last Segment Descriptor.
When set, this bit indicates that this is the last descriptor of a Tx packet, and that
this descriptor is pointing to the last segment of the packet.
0 27:17 RSVD Reserved.
0 16 UDR FIFO underrun during transmission of this packet.
0 15 TOK Transmit (Tx) OK.
Indicates that a packet exchange sequence has completed successfully.
0 14:8 RTS RC RTS Retry Count. The RTS RC’s initial value is 0. It indicates the number of
retries of RTS.
0 7:0 Packet RC Packet Retry Count.
The RC’s initial value is 0. It indicates the number of retries before a packet was
transmitted properly.
4 31:0 RSVD Reserved.
8 31:0 TxBuff 32-bit Transmit Buffer Address.
12 31:16 MPDUExchange
Time
MPDUExchangeTime corresponds to the just completed MPDU exchange. The
MPDUExchangeTime equals the time required to transmit the MPDU sequence,
i.e., the time required to transmit the MPDU plus the time required to transmit the
expected response frame plus one SIFS.
12 15:12 RSVD Reserved.
12 11:0 Frame_Length Transmit Frame Length.
This field indicates the length in the Tx buffer, in bytes, to be transmitted.
16 31:0 NTDA 32-bit Address of Next Transmit Descriptor.
20 31:0 RSVD Reserved.
24 31:0 RSVD Reserved.
28 31:0 RSVD Reserved.