VSBC-32
Functional Description
ID 21168, Rev. 04
Page 2 - 7
©
PEP Modular Computers GmbH
2.2.4
Serial Communications Control
Under the aspect of serial communications control, a major advantage of the
MC68(EN)360 serial communications controller core SIM60 is its compatibility with all
important communication standards. A detailled description of all control functions is
provided on the following pages alongside with a comprehensive list of the possible
serial interface piggybacks and their connectors.
For the mainboard interface connector pinouts refer also to the “Board Interfaces” sec-
tion of this chapter. For a description and pinouts of the connectors of the serial inter-
face/communication piggybacks as well as of the CXM-SIO3 frontpanel interface
connectors please refer instead to the “SI Piggybacks” appendix of this manual as well
as to the CXM-SIO3 user’s manual and its “Serial Communications Piggybacks” appen-
dix respectively.
Communication Standards and Protocols
Six communication standards are available on the VSBC-32(E):
•
Serial I/O (RS232, RS485; RS422)
•
Ethernet (10Base2, 10Base5, 10BaseT)
Serial communications using the RS232 standard are available on the VSBC-32(E)
mainboard frontpanel as well as on a dedicated piggyback to be connected to its SI
Interface. In addition, RS232 communication is possible via a CXM-SIO3 external serial
interface module. Communications using the PROFIBUS protocol are supported by an
optoisolated, half-duplex RS485 serial I/O interface implemented on a dedicated piggy-
back to be connected to the SI Interface of either the VSBC-32(E) or the external serial
interface module. RS422 is not commonly available on the VSBC-32(E) but can be sup-
plied by
PEP Modular Computers on special request.
The MC68(EN)360 processor is specified to support also a full set of IEEE 802.3/Ether-
net CSMA/CD media access control and channel interface functions. Since the control-
ler requires an external interface adapter and transceiver function, the Ethernet
interface can be adapted to all standard Ethernet functions, such as 10BaseT, 10Base5
and 10Base2 via a piggyback connected to the SI Interface on the VSBC-32(E).
Serial I/O Channelling
The VSBC-32(E) mainboard is provided with TxD and RxD signals by the controller’s
SMC1 and SMC2 channels and supply RS232 interface software handshake (XON/
XOFF) capability. They are configured as service/debug connectors by default.
All full modem interfaces located on the piggybacks and/or CXM-SIO3 external serial
interface module supply RxD, TxD, RTS, CTS, CD, DTR and RCLK/TCLK. Two of the
full modem interfaces can be configured on the piggyback interface with a variety of
Note...
The CXC bus does not support a 12V power supply. Therefore,
the 10Base5 Ethernet piggyback SI-10B5 cannot be used on the
IUC-32(E) controller board.
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