About Core Module
The Core Module is the key element of every TOWER device. It has a 32-bit ARM microcontroller with 192 kB of flash memory and 20 kB of RAM. Besides the integrated sub-GHz radio for the 868/915 MHz band, it also features a digital temperature sensor, 3D accelerometer, and security chip.
caution
The maximum current for a single pin is 16 mA.
The maximum current for all GPIOs combined is 90 mA.
| Pin | Signal | MCU Pin | 5 V Tolerant |
|---|---|---|---|
| 1 | P0/A0/TXD0 | PA0 (10) | |
| 2 | P1/A1/RXD0 | PA1 (11) | Yes |
| 3 | P2/A2/TXD1 | PA3 (13) | Yes |
| 4 | P3/A3/RXD0 | PA2 (12) | Yes |
| 5 | P4/A4/DAC0 | PA4 (14) | |
| 6 | P5/A5/DAC1 | PA5 (15) | |
| 7 | P6/RTS1 | PB1 (19) | Yes |
| 8 | P7/CTS1 | PA6 (16) | Yes |
| 9 | P8 | PB0 (18) | Yes |
| 10 | P9 | PB2 (20) | Yes |
| 21 | P10/RXD2 | PA10 (31) | Yes |
| 22 | P11/TXD2 | PA9 (30) | Yes |
| 23 | P12/MISO | PB14 (27) | Yes |
| 24 | P13/MOSI | PB15 (28) | Yes |
| 25 | P14/SCLK | PB13 (26) | Yes |
| 26 | P15/CS | PB12 (25) | Yes |
| 27 | P16/SCL1 | PB8 (45) | Yes |
| 28 | P17/SDA1 | PB9 (46) | Yes |
Features
- ARM Cortex M0+ 32-bit MCU STM32L083CZ (ST)
- 192 kB Flash / 20 kB RAM
- Radio module (868/915 MHz) based on SPIRIT1 (ST)
- Security chip ATSHA204A (Microchip)
- Digital temperature sensor TMP112 (TI)
- 3-axis accelerometer LIS2DH12 (ST)
- Red color LED
- Push button RESET and BOOT (BOOT is available to MCU)
- Easily programmable via USB (DFU bootloader)
- 10-pin SWD connector for debugging
- Micro-USB for host communication and/or power
- 18x GPIO (completely free for application)
- 3x UART, 2x I²C, 1x SPI, 5x ADC, 2x DAC
- Deep sleep mode: < 5 µA
- Operating voltage range: 2.0 V to 3.6 V
- Operating temperature range: -20 to 70 °C
- Mechanical dimensions: 33 x 55 mm