Hardware manual

EUROCOM-17-5xx 3 Programmers Reference
Hardware Manual 67
3.7 Serial I/O
The EUROCOM-17-5xx offers four serial I/O lines, implemented by a
CL-CD2401 Multi-Protocol Controller (MPC). C1 and C2 are hardwired
to feature RS232 two-wire (C1) and four-wire (C2) hardware handshake
mode, while C3 and C4 use removable serial interface level converters
(SILC). As shipped, two RS232 level converter SILCs are installed
featuring hardware handshake as well as XON/XOFF protocol. Different
level converter plug-ins, like RS422 and RS485, are available.
3.7.1 Multi-Protocol
Controller
(MPC)
The operating mode and data format of each channel is programmed
independently.
The baud rate generator is driven by 20MHz. The time constant values in
the following table are based on that frequency.
The interrupt request of the MPC is connected to the LIRQ6 input of the
VIC. The MPC has higher priority than the CIOs in the daisy chain.
Table39: Time Constant Values for MPC
Bit Rate Divisor Clock Error (%)
50 $C2 clk4 -0.16
110 $58 clk4 -0.25
150 $40 clk4 +0.16
300 $81 clk3 +0.16
600 $40 clk3 +0.16
1200 $81 clk2 +0.16
2400 $40 clk2 +0.16
3600 $AD clk1 -0.22
4800 $81 clk1 +0.16
7200 $56 clk1 -0.23
9600 $40 clk1 +0.16
19200 $81 clk0 +0.16
38400 $40 clk0 +0.16
56000 $2C clk0 -0.79
64000 $26 clk0 +0.16