5.4.58 PLCA Burst Mode Register

Name: PLCA_BURST
Address: 0xCA05

Bit 15141312111098 
 MAXBC[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 
Bit 76543210 
 BTMR[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 10000000 

Bits 15:8 – MAXBC[7:0] Maximum Burst Count

This field configures the maximum number of additional frames that the node may transmit in a single transmit opportunity. When set to 0, the PLCA burst mode is disabled and only one frame will be transmitted per transmit opportunity.

ValueDescription
0 Burst mode disabled. Only one frame will be transmitted per Transmit Opportunity.
1-0xFF Number of additional frames that may be transmitted in a burst.

Bits 7:0 – BTMR[7:0] Burst Timer

When burst mode is enabled, this field configures the amount of time allowed following the transmission of a frame which the node will continue to transmit and hold the multidrop network waiting for the MAC to transmit an additional frame. Should the timer expire before the MAC transmits an additional frame, or if the maximum number of frames allowed to be transmitted in a single burst has been exceeded, the node will stop transmitting and yield the network to the next transmit opportunity.

The time is represented in increments of 100 ns (i.e., 1 BT).

Note: The minimum value should be equal to the MAC inter-frame gap (IFG) plus margin for the latency between the MAC and PHY.