28
28
Development Kit
28
3.8
LEDs
The POWER LED lights when the DevKit is powered.
The GPLED and LOGLED are connected to the homonymous pins of the 30-pin connector
of the AsteRx-m2a board. See section 2.5.1 for the pinout, and Appendix A for a
description of the LED behavior.
3.9
COM Ports
By default, the four COM ports of the AsteRx-m2a are routed to the four DB9 connectors.
Electrical levels on the BD9 conform to the RS232 standard. RTS/CTS lines are supported
only on COM2 and COM3. Connection to a PC is done through a null-modem cable.
Alternatively, 3.3V TTL signals are available through four 6-pin headers, as shown below.
The pinout is compatible with standard FTDI 6-pin SIL connectors. To route a COM port to
the 6-pin header instead of the BD9 connector, a jumper must be placed on J800 (COM1),
J801 (COM2), J804 (COM3) and/or J805 (COM4). Only those COM ports for which the
jumper is placed are routed to the 6-pin header. The other COM ports are still routed to
the DB9 connectors, using the RS232 levels.
- POWER
- GPLED
- LOGLED
COM 1
COM 2
COM 3
COM 4
