LPC1224_BO_SRM
Board v0.3
Fig 10 – ADC Input Pins and Vref
4.1.6 Reset and ISP mode
Reseting the LPC1224 without removing the power can be done with the Reset button (SW2).
To enter In-System Programming (ISP) mode after reset you must hold the ISP button (SW1) when you release
the reset button. The LPC1224 bootloader considers a LOW level on the PIO0_12 pin as an external hardware
request to enter ISP mode and start the ISP command handler. The sampling of the GPIO0_12 pin may take up
to 3ms.
Refer to section
5.3
or to the LPC1224 user manual for more information on ISP mode.
If the ISP button is not held when th Reset button is released (and a valid user code is found in Flash memory)
then the execution is transfered to the user program.
4.2 I2C
The LPC1224 break-out board has no components on the I2C bus, leaving the whole address space available for
the user. The LPC1224 break-out board provides two 1.5kOhms pull-up resistors on both SDA and SCL lines.
4.3 User Led and Button
The module has three leds and two buttons. The two leds connected to the USB to UART bridge (D3 and D4)
and the Reset button have dedicated functions and cannot be assigned other functions.
The remaining led (D1) and button (ISP) can be used as the user wishes.
The D1 led is a bi-color red / green led connected to PIO1_4 (pin 40) and PIO1_5 (pin 41). Both can be turned
on at the same time, providing a third color (orange).
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