XXMIT Command Word
The XXMIT performs six functions shown below. For each function certain bits of the Command word must be set.
Command Word Bits
Command Word Functions in Relation to Bits
Function |
Command word bits that may be set to 1 |
Bits that MUST be set to = 0 |
|---|---|---|
Terminated ASCII input (Bit 11=1) (See note below) |
14,7,6,5,4 |
10,9,8,3,2,1,0 |
Simple ASCII input (Bit 10=1) (See note below) |
14,7,6,5,4 |
11,9,8,3,2,1,0 |
Simple ASCII output (Bit 9=1) |
14,7,6,5,4 |
11,10,8,3,2,1,0 |
Modem output (Bit 9=1) |
14,3,2,1,0 |
11,10,8,7,6,5,4 (plus one, but ONLY one, of the following bits is set to 1: 3,2,1 or 0, while the other three bits must be set to 0) |
Modbus master messaging output (Bit 8=1) |
14, |
11,10,9,7,6,5,4,3,2,1,0 |
NOTE: When using either of these functions you
MUST set Enable ASCII receive FIFO ( Bit 7) to 1. Bit 15 (MSB) and
Bits 13 and 12 are reserved. (See Table Command)