Four Channel, Serial (RS232/422/485) (Module P8) /Isolated RS-422/RS-485 (Module PC)68C3 Operations Manual North Atlantic Industries, Inc. 12/19/2014Rev: 2014-12-19-0947 www.naii.com Page 100 of 330HDLC Tx Address/Sync CharacterType: unsigned character wordRange: not applicableRead/Write: R/WInitialized Value: A5hModes Affected: HDLC and SynchronousThis register is mode dependent. If using HDLC mode, this value is compared to the address is received messageand if it’s equal, the message is stored in the receive buffer. If using Mono/Bi-Synchronous mode, this value isconsidered the “Sync Character” and is used for communication synchronization. The receiver searches incomingdata for the Sync Character. Once found, communication is synchronized and additional data is valid. When in 16bit, high byte sent before low byte.REGISTER D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 FUNCTIONHDLC TX/SYNC CHAR D D D D D D D D D D D D D D D D D=DATA BITTermination CharacterType: unsigned character (usually a member of the ASCII data set)Range: not applicableRead/Write: R/WInitialized Value: 3hModes Affected: Async and SyncThis register contains the termination character used for termination detection. When using the Asynchronous or Bi-Synchronous modes, the receive data stream is monitored for the occurrence of the termination character. When thischaracter is detected, an interrupt is generated, if enabled and not masked.REGISTER D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 FUNCTIONTERMINATION CHAR X X X X X X X X D D D D D D D D D=DATA BITXON CharacterType: unsigned character (usually a member of the ASCII data set)Range: not applicableRead/Write: R/WInitialized Value: 11hModes Affected: AsyncThis register bit field specifies the XON character for in-band flow control in Async mode.REGISTER D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 FUNCTIONXON CHAR X X X X X X X X D D D D D D D D D=DATA BIT
