General Purpose I/O eRIC Sigfox AT Datasheet Antenna 24 23 22 21 20 GPIO 1 RF eRIC Sigfox 19 Temp BPF GPIO 2 18 Sensor Serial Data Out 3 17 RF Transceiver Serial Data In 4 16 Microcontroller Non- Volatile GPIO 5 15 Flash Operating System Vcc 6 14 3.3V Regulator Application Gnd 7 13 8 9 10 11 12 Product image for illustration purposes only Block Diagram Features Applications Ultra Narrow band modulation Up-link and down-link for Sigfox networks Serial Data Input and Output Where required range is above 1km or transceiver is in poor Pin compatible with all eRIC series RF modules RF location uFL RF connector for remote antennas Suburban security alarms - void buildings, caravan or car storage Built in on-chip temperature sensor sites, warehouses Supply voltage measurements Rural security, farm buildings/equipment, livestock monitoring, Operating temperature range -40C to 85C remote irrigation pumps Data collection and monitoring over a wide physical area Receiver Transmitter Carrier frequency 869.525 MHz High efficiency Power Amplifier Data-rate up to 600 bps Carrier frequency 868.13 MHz Sensitivity -126 dBm 600bps, GFSK Data-rate 100 bps PSK Line of Sight (LoS) range - 1km 3km plus RF Power output: up to +14dBm Power level programmable in 1dBm steps from 0dBm to +14dBm Power Consumption General Purpose Input/Output (GPIO) Power Supply range 2.5V 5.0V 4 x GPIO pins with selectable voltage measure functionality Ultra-low power consumption: 2 x GPIO pins with selectable Sigma Delta DAC output Standby mode current: 0.5 mA functionality Sleep mode current: 1.3 A 2 x GPIO pins with selectable output clock Deep sleep mode current: 100 nA 3 x GPIO pins selectable as SPI master interface Continuous radio Rx mode: 10 mA Continuous radio Tx mode: 49 mA 14 dBm Charge required to send a Sigfox packet at 14 dBm output power: 0.28C The eRIC Sigfox AT RF transceiver module provides an ultra-low power module solution for nodes connected to the Sigfox network. The module is a complete sub-system that combines a high performance low power RF transceiver, a microcontroller and a voltage regulator. The form factor and pin out is compatible with other LPRS eRIC family modules allowing a drop-in replacement to upgrade or change the radio technology of host devices. The module is delivered ready for use and contains the necessary firmware to transmit and receive data from the Sigfox network in Europe and the UK. It connects to the customer host product via a logic level RS232 UART operating at 9600 bps. AT commands are used to configure the radio parameters and send up-link and down-link frames to the network. The module uses Ultra-Narrow Band (UNB) RF modulation to achieve excellent range and provide rugged and reliable connections to SigFox base stations and networks. Key operating parameters can be changed and configured by sending simple text (ASCII character) AT modem commands to the module via the on-board UART. Pin Description eRIC Sigfox Datasheet 1.2 Page 1 of 11 eRIC Sigfox AT Datasheet Pad Description SIGFOX Type Notes No Function 1 GPIO4 PCO/SEL I/0/PU GPIO, selectable DAC functionality, selectable clock functionality 2 CPU Activity Indicator PB0/TX1 O LED drive via external current limit resistor 3 UART Tx PB4/TXO O Serial Data Out to host 4 UART Rx PB5/RXO I/PU Serial Data In from host 5 Radio Activity Indicator PB1/RX1 O LED drive via external current limit resistor 6 Power Input P Positive power supply pin. +2.5 to +5.5 Volts. This should be a clean noise free supply with less than 25mV of ripple 7 Gnd P Power Gnd 0 V 8 JTAG DBG En N Reserved use - Do Not Connect 9 Reset RST N I/PU Internal Pull-up 10 Transmit Activity DBG CLK O LED drive via external current limit resistor Indicator 11 No Connection NC 12 Receive Activity Indicator DBG/DATA O LED drive via external current limit resistor 13 GPIO0 PA0/ADC0 I/0/A/PU GPIO, selectable ADC functionality, selectable DAC functionality, selectable clock functionality 14 GPIO1 PA1/ADC1 I/0/A/PU GPIO, selectable ADC functionality 15 GPIO2 PA2 I/0/A/PU GPIO, selectable ADC functionality 16 GPIO3 PA5 I/0/A/PU GPIO, selectable ADC functionality 17 GPIO8 PC4 I/0/PU GPIO 18 GPIO7 PC3/MISO I/0/PU GPIO, SPI MISO 19 GPIO6 PC2/MOSI I/0/PU GPIO, SPI MOSI 20 No Connection NC 21 GPIO5 PC1/SCK GPIO, SPI SCK 22 GPIO9 PB3 I/0/PU GPIO, Wakeup from Deep sleep 23 RF Ground P RF Gnd. Connect to antenna ground (coaxial cable screen braid) and local ground plane. Internally connected to other Ground pins. 24 Antenna Antenna A 50 RF input/output. Connect to suitable antenna. Key: A Analog signal I/O Digital input/output signal I Digital input signal N Not to be connected O Digital output signal P Power or ground PU Pull-up PD Pull-down Possible GPIO modes Pin GPIO0 0,1,Z,U,A,T GPIO1, 2, 3 0,1,Z,U,A GPIO4 0,1,Z,U,T 0,1,Z,U GPIO5, 6, 7, 8, 9 Pin is configured as: O Output driver U Input with pull-up I No Connect A Analogue input Z High impedance input T Driven by Clock or DAC Notes The module operates internally from an on-board 3.3 Volt low dropout voltage regulator. The logic levels of the GPIO input/output pins are therefore between 0 Volt and 3.3 Volts. Digital outputs will drive external logic operating at 3.3 Volts. Digital inputs are 5V tolerant with the exception of GPIO3 which must NOT be driven above the VDD IO voltage. All digital inputs are Schmitt trigger inputs, digital input and output levels are LVCMOS/LVTTL compatible. All GPIO pins start up as input with pull-up. For explanations on how to use the GPIO pins, see the AT Commands. eRIC Sigfox Datasheet 1.2 Page 2 of 11