Table 11. Usb Jumper (P300); Table 12. Rs232-2 Connector Pinout (J500) - Motorola F3030A Developer's Manual

G20 developer's kit

Table of Contents

The USB jumper (P300) located next to the USB connector selects between the Developer Board USB interface and the UUT

USB interface. By changing the jumper position, the USB_VBUS signal is diverted to the selected driver (in the g20 or on the

Developer Board) and operates it.

3.4.2.3

SPI

The 9-pin D-type RS232-2 serial port (J500) is connected to the g20 internal SPI bus. This interface is used to debug applica-

tions. On the Developer Board, the g20 SPI interface is converted to standard RS232 signals for PC communications. The

conversion process uses the RS232 interface as a second slave on the internal g20 SPI bus, and communicates with it as such.

SPI read and write operations are performed normally, using the CS and IRQ signals provided by the conversion circuit. The

IRQ signal is connected to a g20 IRQ pin.

The RS232-2 connector pin names are DTE-oriented.

Note

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