NORA-W10 series - System integration manual
UBX-22005601 - R04 Module integration Page 16 of 56
C1-Public
It is possible to connect the remaining SPI interfaces to other pins via the IO MUX but the maximum
speed will be reduced. It is also possible to configure the SPI interface as a dual or quad SPI (2 or 4-bit
bidirectional data signals). See also Dual/Quad SPI. The module can be configured as both SPI master
and slave.
⚠ External flash cannot be used for code execution.
2.7.3 Dual/Quad SPI
The dual/quad SPI (2 or 4 bi-bidirectional data signals) can be used for connecting an additional
external PSRAM. The SPI to dual/quad SPI signal mappings is shown in Table 4.
Table 4: SPI to dual/quad SPI signal mapping
2.7.4 TWAI
NORA-W10 modules support the Two-Wire Automotive Interface TWAI) communication protocol,
with inherited with message priorities and arbitration. It provides multi-master and multi-cast
communication with error detection and signaling. The TWAI controller can operate at bit rates of
1 Kbit/s to 1 Mbit/s with 64-byte receive FIFO. It also supports CAN specification 2.0
2.8 Analog interfaces
2.8.1 Analog to digital converters
NORA-W10 modules support two 12-bit SAR Analog to Digital Converters (ADC). Any analog-capable
pin can be used for ADC application. All appropriate analog pins are shown in the Pinout.
For lower power consumption, NORA-W101, NORA-W106 modules can measure voltages in sleep
mode and threshold settings can be used to wake the CPU.
☞ Analog pins cannot be re-routed to other pins through the IO MUX.
2.9 No-connect pins (NC)
Do not connect the NC pin. No-Connect pins are allocated for future interfaces and functionality.
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