Comtech EF Data SMS-301 - Manual (Page 68)

Theory of Operation SMS-301 Redundancy Switch
4-2 Rev. 3
4.1.1 Theory of Operation
The M&C module uses an Intel 80C32
 microcontroller operating at 11.0592 MHz. The
microsystem supports 256 kbit/s of FLASH memory for code and data.
Memory-mapped I/O includes:
•
Real time clock/memory
•
8-channel analog-to-digital converter
•
External buffered bus structure for overall 1:1 switch control and status gathering.
The 80C32 microcontroller supports a serial, asynchronous, remote control (J10)
communications channel (EIA-232 or EIA-485) with a maximum baud rate of 19200 bit/s.
The modem control interface (J13) is an EIA-485 serial communication link which allows
the 1:1 switch to monitor and configure the attached modems.
A lithium battery maintains the system real time clock and 1:1 switch configuration
through power-down situations.
The M&C motherboard interfaces and controls a variety of data interface connector
switch boards. The customer-application dictates the type of connector switch board to be
installed within the 1:1 switch.