SMB87: Receive message control byte
MSB LSB
en sc ec il c/m tmr bk 0
en: 0 =Receive message function is disabled.
1 =Receive message function is enabled.
The enable/disable receive message bit is checked each time the RCV instruction is executed.
sc: 0 =Ignore SMB88 or SMB188.
1 =Use the value of SMB88 or SMB188 to detect start of message.
ec: 0 =Ignore SMB89 or SMB189.
1 =Use the value of SMB89 or SMB189 to detect end of message.
il: 0 =Ignore SMW90 or SMW190.
1 =Use the value of SMW90 or SMW190 to detect an idle line condition.
c/m: 0 =Timer is an inter-character timer.
1 =Timer is a message timer.
tmr: 0 =Ignore SMW92 or SMW192.
1 =Terminate receive if the time period in SMW92 or SMW192 is exceeded.
bk: 0 =Ignore break conditions.
1 =Use break condition as start of message detection.