DuraCOR 311
Chapter 2 Operational Description
MNL-0667-01 Rev B2
ECO-5941
Effective: 17 Mar 20
Page 19 of 72
Serial Configuration
The DuraCOR C311 has two integrated serial ports that are capable of RS232, RS422, and RS485. By
default, both of the serial ports are configured as RS232. The onboard microcontroller manages the mode
of the serial interfaces, and can be configured via USB. See Appendix A for more information on
configuring the serial interfaces via the onboard microcontroller.
Console Redirect
A third RS232 port can be obtained by disabling console redirection. The DuraCOR 311 is not capable of
console redirection. The SMARC module utilizes the internal SMARC COM1 port for console redirect.
This port is not brought to the circular connectors.
GPIO
The DuraCOR C311 has support for 6x GPIO lines on the J3 connector (See Chapter 4, J3 for pins). The
signals may be configured as any combination of input or output lines. Each output drives to a 3.3V level,
inputs are 5V tolerant. See Appendix B for configuring the GPIO signals.
Built-In Test (BIT)
The onboard microcontroller monitors many status lines and voltages on the system for the purposes of
BIT. The microcontroller runs these tests continuously, and logs their results to non-volatile memory.
See Appendix A for more information on accessing BIT information.
Zeroization
For data security, the DuraCOR 311 provides a zeroization connection to the Atom processor and the BIT
microcontroller. The user has the ability to implement the appropriate software for the system application.
The zeroization input can be accessed from J2_28 and J2_36, see Chapter 4.
Remote Off
Remote Off may be used to hold the DuraCOR 311 in a powered off state until the user desires the unit to
be powered. When Remote Off is enabled, no power is delivered to the system. Remote Off must be
disabled in order for the system to draw power.
Warning! The remote off signal will immediately power down the processor when it is asserted. Make
sure your system software is capable of handling hard power faults.
Implementing Remote Off
To enable Remote Off using the Test Cable Set (CBL-C31X-01), connect the labeled red hermaphroditic
Power Pole connectors together. Disable Remote Off by separating the connectors.
