3.7.3 Configuration and Test Points

AT32UC3CB1256 Default Firmware Configuration

The default firmware pre-loaded on the Atmel AT32UC3B1256 is dynamically configurable upon power-up:

  • The USB DFU Bootloader can be enabled by closing the J28 jumper

  • Use FLIP/batchisp to read/write resources on the AT32UC3B1256 through the bootloader

Attention:

Programming the AT32UC3B1256 will overwrite the default firmware.

Test points

A few test points covering the USB Interface block have been placed on the Atmel AT32UC3C-EK for the verification of important signals.

Table 3-26. USB Interface Block Test Points
DesignationFeature
TP64VBUS
TP65D-
TP66D+
TP67GND
TP68JTAG.TCK.UC3B
TP69JTAG.TDO.UC3B
TP70JTAG.TMS.UC3B
TP71JTAG.TDI.UC3B
TP72RESET_N.UC3B