4-1
Rev. 1.0
2016-10-24
User Manual
TLE984x Evalboard Rev 1.3
Communication Interfaces
4
Communication Interfaces
4.1
LIN and uIO for LIN BSL
The device integrated LIN transceiver is connected to a banana jack and additionally to the uIO BSL interface. To
integrate the device in a LIN network it is sufficient to use the single wire banana interface. The BSL interface is
intended to program the device via LIN. For further information about the uIO interface see
www.hitex.com/uio
.
4.2
UART (Virtual COM PORT via USB)
A virtual COM port provided by Segger driver enables a PC – board – communication via UART. The UART2 module
of TLE984x uses the pins P1.0 (transmit) and P1.1 (receive). Those are connected to the XMC4200, which emulates
Rx and Tx on PC side with Segger firmware. Though they cannot be disconnected physically, bidirectional level
shifters ensure that the XMC pins are hi-Z in case the virtual COM port is not used. By connecting the evaluation
board to the PC a virtual COM port gets emulated by the Segger driver automatically. The port will show up in the
Microsoft® Windows® device manager.
Figure 4
UART and Debugging
Note:
Only one of the interfaces USB or SWD can be used at one time. While using the SWD interface the XMC
is hold in reset. As long as a debugger is connected with the SWD interface it eliminates therefore
debugging or UART via USB.
4.3
SWD-Debuginterface (J-Link via USB)
For serial wire debug (SWD) the TLE984x uses the pins TMS (data) and P0.0 (clock). Level shifters between
XMC4200 and TLE984x allow using P0.0, while it is not used for debugging.
The Segger J-Link module on board allows serial wire debugging via USB.
It is also possible to use an alternative debugger than the onboard Segger debugger, e.g. Keil ULINK2. Therefore
the signals are routed through the 10 pin header SWD interface between the XMC4200 and the TLE984x. The pin
configuration makes sure that the XMC is hold in reset while another debugger is physically connected at X14. The
virtual COM Port will be disabled, while the external ISP is connected.
