Motorola USB08 Betriebsanleitung PDF herunterladen (Seite 33)

7.3 Settings>COM Port

Tab for configuring the RS232 port which will be used to communicate with the target board. Note

the caveats in USB-to-Serial Adapters on page 12.

Port to use:

Select an available COM port from the drop-down list. This combo box displays all the COM ports

returned by the Windows 'Enumerate COM Ports' function.

Baud Rate

This combo box selects the baud rate which Xplor8 uses to communicate with the Monitor ROM

program on the MCU. Unless you are using a non-standard crystal it will usually be 9600 baud.

Note that the only baud rates obtainable in practice are those which are integer divisions of 115200

baud, for example 7680 baud is obtainable because 7680 = 115200 ÷15. If a rate somewhere between

the available rates is entered in one of the edit boxes, then the UART in the PC defaults to the first

available rate above the rate entered. Beside the box is a spin control which will automatically select

the next higher or lower integer division of 115200.

Remote Power-on Reset

The options on this panel control the signaling of a reset between the host PC and the target board.

The RS232 communication ports on a PC have two available output pins (besides TxD): DTR (Data

Terminal Ready) and RTS (Ready To Send). Either of these may be used to perform a reset remo tely,

provided the necessary hardware logic is in place (see Appendix B - Hardware).

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 99 100

Keine Kommentare

Motorola USB08 Betriebsanleitung Seite 33