Integration Manual
Table Of Contents
- Document information
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Applications
- 1.3 Architecture
- 1.4 Pin assignments
- 1.5 Supply interfaces
- 1.6 System function interfaces
- 1.7 Debug
- 1.8 GPIO pins
- 1.9 Analog interfaces
- 1.10 Serial interfaces
- 1.10.1 Universal Asynchronous Receiver/Transmitter (UART)
- 1.10.2 Serial Peripheral Interface (SPI)
- 1.10.3 Quad Serial Peripheral Interface (QSPI)
- 1.10.4 Inter-Integrated Circuit (I2C) interface
- 1.10.5 Pulse Width Modulation (PWM) interface
- 1.10.6 Inter-IC Sound (I2S) interface
- 1.10.7 Pulse Density Modulation (PDM) interface
- 1.10.8 USB 2.0 device interface
- 1.11 Antenna interface
- 1.12 Reserved pins (RSVD)
- 1.13 GND pins
- 2 Software
- 3 Flashing application software
- 4 Design-in
- 5 Handling and soldering
- 6 Regulatory information and requirements
- 6.1 ETSI – European market
- 6.2 FCC/ISED – US/Canadian markets
- 6.3 MIC - Japanese market (pending)
- 6.4 NCC – Taiwanese market (pending)
- 6.5 KCC – South Korean market (pending)
- 6.6 ANATEL Brazil compliance (pending)
- 6.7 Australia and New Zealand regulatory compliance (pending)
- 6.8 South Africa regulatory compliance (pending)
- 6.9 Integration checklist
- 6.10 Pre-approved antennas list
- 7 Technology standards compliance
- 8 Product testing
- Appendix
- A Glossary
- B Antenna reference designs
- Related documents
- Revision history
- Contact
NORA-B1 series - System integration manual
UBX-20027617 - R04 System description Page 13 of 61
C1-Public
1.9.4 Analog pin options
Table 3 shows the supported connections of the analog functions.
☞ An analog pin may not be simultaneously connected to multiple functions.
Symbol
Analog function
Connects to
ADCP
ADC single-ended or differential positive input
Any analog pin or VDD
ADCN
ADC differential negative input
Any analog pin or VDD
VIN+
Comparator input
Any analog pin
VREF
Comparator single-ended mode reference ladder
input
Any analog pin, VDD, 1.2 V, 1.8V or 2.4V
VIN-
Comparator differential mode negative input
Any analog pin
LP_VIN+
Low-power comparator IN+
Any analog pin
LP_VIN-
Low-power comparator IN-
GPIO_16 or GPIO_18, 1/16 to 15/16 VDD in steps of 1/16 VDD
Table 3: Possible uses of the analog pin
1.10 Serial interfaces
1.10.1 Universal Asynchronous Receiver/Transmitter (UART)
NORA-B1 series modules support up to five UART ports for data communication. Four are available
through the application core. One is available through the network core.
The following UART signals are available:
• Data lines (RXD as input, TXD as output)
• Hardware flow control lines (CTS as input, RTS as output)
The UART can be used as either a 4-wire UART with hardware flow control or a 2-wire UART with
only TXD and RXD.
Depending on the MCUboot bootloader configuration, one of the UART interfaces on the application
core can be used for software upgrades. See also Handling and soldering. It is recommended that
this UART is connected to a header for software upgrades or made available for test points.
The I/O level of the UART follows the VDD voltage and it can thus be in the range of 1.7 V and 3.6 V.
A level shifter should be used if connecting NORA-B1 to a host with any other voltage on the UART
interface.
1.10.2 Serial Peripheral Interface (SPI)
NORA-B1 supports up to six SPI ports that can operate with a maximum serial clock frequency of
8 MHz in either controller (master) or peripheral (slave) mode. Five are available through the
application core. One is available through the network core. The SPI interfaces use the following
signals:
• SCLK
• MOSI
• MISO
• CS
• DCX (Data/Command signal) - This signal is optional but is sometimes used by the SPI slaves to
distinguish between SPI commands and data.
When using the SPI interface in controller mode, it is possible to use GPIOs as additional Chip Select
(CS) signals to allow the addressing of multiple slaves.