Keil Logo

Jumper Descriptions

The jumpers used to configure the MCB2300 board are:

  • D-: USB Line: For V3 boards, connects the D- pin of the USB B (device) connector to P0.30. For V4 boards, this is a 2-position jumper. When the jumper is positioned closer to the LCD, it connects the D- pin of the USB mini-B (OTG) connector to P0.30. When the jumper is positioned away from the LCD, it connects the D- pin of the USB B (device) connector to P0.30.
  • D+: USB Line: For V3 boards, connects the D+ pin of the USB B (device) connector to P0.29. For V4 boards, this is a 2-position jumper. When the jumper is positioned closer to the LCD, it connects the D+ pin of the USB mini-B (OTG) connector to P0.29. When the jumper is positioned away from the LCD, it connects the D+ pin of the USB B (device) connector to P0.29.
  • J3 - AOUT: D/A Output for loudspeaker: connects the AOUT output to the LF amplifier.
  • UMODE: USB Device Mode: Positioning this jumper toward the LCD display allows soft-connect of the USB device by issuing a software restart via P2.9. Positioning this jumper toward the speaker requires a power-up sequence for the USB detection.
  • J6 - AD0.0: Analog Voltage for AD0.0: connects the POT1 potentiometer to the analog input AD0.0.
  • J8 - INT0: Enable Push Button INT0: connects the push button INT0 to the CPU I/O pin P2.10 (INT0 input). Pushing the button generates a low signal.
  • J9 - RST: Enable Reset via COM0 Port: When RST is set, you may generate a CPU RESET signal using the DTR signal of the COM0 port. An active DTR signal generates a CPU RESET.
  • J10 - ISP: Enable for In-System Programming: lets the RTS line of the COM0 port generate a signal on P2.10 (INT0). When RTS is active P2.10 is driven low. This is used to enter In-System Programming (ISP) mode.
  • J11 - LED: Enable LED Driver: enables the LED driver connecting the on-board LEDs to GPIO Port2.0 - Port2.7.
  • J13 - ETM: Enable ETM Interface: enables the Embedded Trace Module (ETM). Port2.0 - Port2.7 LEDs cannot be used when J13 is set because these pins share the same ETM signals.

Notes

  • Jumper J4 is labelled ETM on Version 2 MCB23xx boards and earlier.
  • Jumper J13 is labelled JTAG on Version 2 MCB23xx boards and earlier.

Related Knowledgebase Articles

  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.