ST STM32L073RZT3

STM32L073RZT3 Description

The high-performance Arm Cortex-M0+ 32-bit RISC core operating at a 32 MHz frequency, a memory protection unit (MPU), high-speed embedded memories (up to 192 Kbytes of Flash program memory, 6 Kbytes of data EEPROM, and 20 Kbytes of RAM), as well as a wide variety of enhanced I/Os and peripherals, are all included in the ultra-low-power STM32L073RZT3 microcontroller.

High power efficiency is offered by the STM32L073RZT3 device for a variety of performances. A wide variety of internal and external clock sources, an internal voltage adaption, and numerous low-power modes are used to achieve it.

The STM32L073RZT3 device includes a number of analog features, including a 12-bit ADC with hardware oversampling, two DACs, two ultra-low-power comparators, several timers, one low-power timer (LPTIM), four general-purpose 16-bit timers, and two basic timers—an RTC and a SysTick—that can be used as timebases. Additionally, they have two watchdogs: one with independent clock and window functionality and the other with a window watchdog based on a bus clock.

The STM32L073RZT3 device also incorporates both conventional and cutting-edge communication interfaces, including up to three I2Cs, two SPIs, one I2S, four USARTs, a low-power UART (LPUART), and a crystal-free USB. The gadgets allow you to easily add touch sensing capability to any application thanks to their up to 24 capacitive sensing channels.

A real-time clock and a collection of backup registers are also included in the STM32L073RZT3.

A built-in LCD voltage generator in their integrated LCD controller allows them to drive up to 8 multiplexed LCDs with contrast independent of the supply voltage.

The ultra-low-power STM32L073RZT3 device runs on a 1.8 to 3.6 V power supply with BOR and a 1.65 to 3.6 V power supply without BOR option (down to 1.65 V at power down). They are offered in the temperature range of -40 to +125 °C. The development of low-power applications is made possible by a wide range of power-saving modes.

STM32L073RZT3 Features

• Rich Analog peripherals

– 12-bit ADC 1.14 Msps up to 16 channels (down to 1.65 V)

– 2 x 12-bit channel DACs with output buffers (down to 1.8 V)

– 2x ultra-low-power comparators (window mode and wake up capability, down to 1.65 V)

• Up to 24 capacitive sensing channels supporting touchkey, linear and rotary touch sensors

• 7-channel DMA controller, supporting ADC, SPI, I2C, USART, DAC, Timers

• 11x peripheral communication interfaces

– 1x USB 2.0 crystal-less, battery charging detection and LPM

– 4x USART (2 with ISO 7816, IrDA), 1x UART (low power)

– Up to 6x SPI 16 Mbits/s

– 3x I2C (2 with SMBus/PMBus)

• 11x timers: 2x 16-bit with up to 4 channels, 2x 16-bit with up to 2 channels, 1x 16-bit ultra-low-power timer, 1x SysTick, 1x RTC, 2x 16-bit basic for DAC, and 2x watchdogs (independent/window)

• CRC calculation unit, 96-bit unique ID

• True RNG and firewall protection

• All packages are ECOPACK2

• Ultra-low-power platform

– 1.65 V to 3.6 V power supply

– -40 to 125 °C temperature range

– 0.29 μA Standby mode (3 wakeup pins)

– 0.43 μA Stop mode (16 wakeup lines)

– 0.86 μA Stop mode + RTC + 20-Kbyte RAM retention

– Down to 93 μA/MHz in Run mode

– 5 μs wakeup time (from Flash memory)

– 41 μA 12-bit ADC conversion at 10 ksps

• Core: Arm? 32-bit Cortex?-M0+ with MPU

– From 32 kHz up to 32 MHz max.

– 0.95 DMIPS/MHz

• Memories

– Up to 192-Kbyte Flash memory with ECC (2 banks with read-while-write capability)

– 20-Kbyte RAM

– 6 Kbytes of data EEPROM with ECC

– 20-byte backup register

– Sector protection against R/W operation

• Up to 84 fast I/Os (78 I/Os 5V tolerant)

• Reset and supply management

– Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds

– Ultra-low-power POR/PDR

– Programmable voltage detector (PVD)

• Clock sources

– 1 to 25 MHz crystal oscillator

– 32 kHz oscillator for RTC with calibration

– High speed internal 16 MHz factory-trimmed RC (+/- 1%)

– Internal low-power 37 kHz RC

– Internal multispeed low-power 65 kHz to 4.2 MHz RC

– Internal self calibration of 48 MHz RC for USB

– PLL for CPU clock

• Pre-programmed bootloader

– USB, USART supported

• Development support

– Serial wire debug supported

• LCD driver for up to 4x52 or 8x48 segments

– Support contrast adjustment

– Support blinking mode

– Step-up converted on board

STM32L073RZT3 Applications

• PC peripherals, gaming, GPS equipment

• Alarm system, wired and wireless sensors, video intercom

• Gas/water meters and industrial sensors

• Healthcare and fitness equipment

• Remote control and user interface