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1.6.2
Internal temperature sensor
The radio chip in the NORA-B1 contains a temperature sensor used to monitor the temperature of the
die.
⚠
The temperature sensor is located inside the radio chip and should not be used if an accurate
temperature reading of the surrounding environment is required.
1.7 Debug
1.7.1
Serial Wire Debug (SWD)
The primary interface for debugging is the SWD interface. NORA-B1 supports an SWD interface for
flashing and debugging. The two pins SWDIO and SWDCLK should be made accessible on header pins
or test points for production-line programming. Both cores use the same SWD interface.
1.8 GPIO pins
☞
The code running on the application core determines the pin mapping for both application and
network cores.
In an un-configured state, NORA-B1 has 48 GPIO pins and no analog or digital interfaces. All interfaces
or functions must be allocated to a GPIO pin before use. Eight of the 48 GPIO pins are analog enabled,
meaning that they can have an analog function allocated to them. Table 1 shows the digital and
analog functions that can be assigned to a GPIO pin.
Function
General purpose input
General purpose output
Pin disabled
Timer/ counter
Interrupt/ Event trigger
HIGH/LOW/Toggle on event Programmable digital level triggered by internal or external
ADC input
Analog comparator input
PWM output
Serial interfaces
Table 1: GPIO custom functions configuration
UBX-20027617 - R02
C1-Public
Description
Digital input with configurable pull-up, pull-down, edge detection
and interrupt generation
Digital output with configurable drive strength, push-pull, or
open drain output
Pin is disconnected from the input and output buffers.
High precision time measurement between two pulses/ pulse
counting with interrupt/event generation
Interrupt/event trigger to software application/ Wake-up event
events without CPU involvement
8/10/12/14-bit analog to digital converter
Compare two voltages, capable of generating wake-up events
and interrupts
Output simple or complex pulse width modulation waveforms
See section 1.10, below for pin assignment restrictions
System description
NORA-B1 series - System integration manual
Default
Configurable
NORA-B1 pin
GPIOs
Any
Any
All
Any
unconfigured
Any
Any
Any
Any analog
Any analog
Any
Any
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