These registers, collectively referred to as the Output MTU block, are used to transfer data to the module.
Control Byte in Sending Direction
This byte contains the information required to reassemble the sent frame from the individual Output MTU blocks and is send to the superordinate module.
|
Bit |
Description |
|---|---|
|
0...5 |
0...63 = Segment length |
|
6 |
0 = Control byte for the next segment is in a new MTU (TxByte1) 1 = Control byte for the next segment follows immediately after the segment end |
|
7 |
0 = Frame is not complete 1 = Frame is complete |
Specifies the length of the segment to be sent. Only six bits are available in the control byte, therefore 63 is the maximum segment length. If the frame to be sent is longer than the maximum segment length, it must be split into several segments with corresponding control bytes. The frame end is indicated to the module by setting bit 7 in the last segment.
Specifies the position of the control byte in the next segment.
Also see Multiple Segments / Segment Size.
In the last segment, this bit is set as the frame end identifier. The complete frame is then released for sending.
