Connect Tech Xtreme/104 Plus, PCI-104 and PCI/104 Express Family User Manual
Revision 0.09
41
22.7 Communications
22.7.1
Baud Rates most models:
RS-232/TTL:
PC/104 Plus Models: 50 bps – 921.6 Kbps
PCI/104 Express models: Any standard baud rate up to 921.6Kbps *
RS-422/485:
PC/104 Plus Models: 50 bps – 1.8432 Mbps
PCI/104 Express models: Any standard baud rate up to 7.812Mbps *
RS-423:
50 bps – 115.2 Kbps
Baud rates 12 and 16 Port models based on Actel FPGA and Exar UARTs:
RS-232:
50bps – 1.0Mbps *
RS-422/485:
50bps – 4. 16Mbps *
*
+/- 1.0 % is the worst case baud rate error. Typical baud rates are less than 0.1%. Typical baud
rates are for example: 1200, 9600, 38400, 57600, 115200, 230400, 921600.
22.7.2
UARTs
Dual, quad or octal Exar PCI UARTs provide 64 byte transmit and receive
FIFO buffers for each port.
Quad or Octal Exar PCI Express UARTs provide 256 byte transmit and receive
FIFO buffers for each port.
Twelve and Sixteen Port models feature quad or octal Exar UARTs with 64 byte FIFO buffers.
22.7.3
Control Signals
Xtreme/104-Plus RS-423 Models
RS-423
:
TxD-, TxDRef, RxD
+/-
,
RTS-, RTSRef and CTS
+/-
Xtreme/104-Plus RS-232/422/485 Models
RS-232
:
TxD, RxD, RTS, CTS, RI, DTR, DSR, DCD and Signal Ground (SG)
RS-422/485
:
TxD
+/-
, RxD
+/-
, RTS
+/-
, CTS
+/-
and Signal Reference (SR)
Xtreme/104-Plus RS-232/422/485/TTL Models
RS-232/TTL:
TxD, RxD, RTS, CTS, RI, DTR, DSR, DCD, Signal Ground (SG) and +5V
RS-422/485
:
TxD
+/-,
RxD
+/-
and Signal Reference (SR)
Xtreme/104-Plus Opto and Xtreme/104 Express Opto RS-232/422/485 Models
RS-232
:
TxD, RxD, RTS, CTS and Signal Ground (SG)
RS-422/485
:
TxD
+/-
, RxD
+/-
, RTS
+/-
, CTS
+/-
and Signal Reference (SR)