Rev 002
47
20. Other Interfaces
There are other available interfaces on the Development Kit, connected through a connector. These
signals are available on the center of the board (on tests points) or on the external board connector
(J1100).
Refer to Table 1 (§4.2) for the pin out. For further technical information, refer to document [1].
20.1. Power Supplies Function
These outputs (VCC_1V8 and VCC_2V8) can be used to connect pull-up resistors.
They must be used as a reference supply.
20.2. Backup Battery Function
The module provides this input/output signal (BAT-RTC) to connect a Real Time Clock power supply.
This pin is used like a backup power supply to save date and time values when VBATT is switched off
(VBATT=0).
20.3. ADC Function
The module provides three analog to digital converters, as described in the subsections below.
20.3.1. Battery Temperature (BAT-TEMP)
This analog input signal (BAT-TEMP) can be used, for example, for a battery charging temperature
sensor.
20.3.2. Auxiliary ADCs (AUX-ADC0 & AUX-ADC1)
These are 10-bit resolution ADCs ranging from 0V to 2V. For further information, refer to document
[1].
20.4. DAC Function (AUX-DAC0)
The module provides one digital to analog converter, the AUX-DAC0 signal. This is an 8-bit resolution
DAC ranging from 0V to 2.3V.
20.5. Serial Bus Function
20.5.1. SPI Bus
The module provides two SPI buses. The master mode is available up to 13Mbit/s with 3 or 4 wires.
