Communication Interfaces; Lin And Uio For Lin Bsl; Uart (Virtual Com Port Via Usb); Swd-Debuginterface (J-Link Via Usb) - Infineon Technologies TLE9844-2QX User Manual

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TLE9844-2QX Application Kit User's Manual

Communication Interfaces

3.1

The device integrated LIN transceiver is connected to a dedicated Connector (see

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.

3.2

A virtual COM port provided by Segger driver enables a PC – board – communication via UART. The UART2

module of TLE9844-2QX 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 can 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 virtual COM 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.

3.3

For serial wire debug the TLE984x uses the pins TMS (data) and P0.0 (clock). Level shifters between XMC4200

and TLE9845QX allow using P0.0, while it is not used for debugging.

The Segger J-Link module on board allows serial wire debugging via USB. Alternative debugging via SWD

interface is possible to debug with another ISP than the onboard Segger e.g. U-Link2. 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 to X11. The virtual

COM port will be disabled, while the external ISP is connected.

TLE9844-2QX Application Kit User's Manual

Figure

3). To integrate the

Rev. 1.0

2018-04-04

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