STM32L471RG

Part: STM32L471RCT6 — STMicroelectronics (STM32L471xx family)

Type: Ultra-low-power ARM Cortex-M4 32-bit MCU with FPU

Description: Ultra-low-power 32-bit ARM Cortex-M4 MCU with FPU at up to 80 MHz (100 DMIPS), 1.71–3.6 V supply, up to 1 MB Flash and 128 KB SRAM, with rich analog and 17 communication interfaces.

Operating Conditions:

• Supply voltage (VDD): 1.71–3.6 V
• Operating temperature: -40 to 85 °C (suffix-dependent: suffix 6 is -40 to 85 °C at maximum power dissipation, suffix 7 is -40 to 105 °C, suffix 3 is -40 to 125 °C; see Table 22)
• Max AHB/APB clock frequency: 80 MHz
• Analog supply VDDA: 1.62–3.6 V when ADC or COMP used; VBAT: 1.55–3.6 V

Absolute Maximum Ratings:

• Max supply voltage (VDDX - VSS): 4.0 V
• Max current into all VDD lines (sum): 150 mA
• Max output current sunk/sourced by any I/O pin: 20 mA
• Max junction temperature: 150 °C
• Storage temperature: -65 to +150 °C

Key Specs:

• VDD range: 1.71–3.6 V
• VDDIO2 (PG[15:2] I/Os) supply: 1.08–3.6 V when used
• VBAT backup voltage: 1.55–3.6 V
• fHCLK / fPCLK1 / fPCLK2: up to 80 MHz
• Power dissipation (TA = 85 °C, suffix 6): 444 mW (LQFP64), 476 mW (LQFP100), 625 mW (LQFP144), 363 mW (UFBGA132)
• Junction temperature range: -40 to 105 °C (suffix 6)
• Typical low-power figures from feature list: 100 μA/MHz run mode, 30 nA Shutdown, 120 nA Standby, 1.1 μA Stop 2

Features:

• ARM Cortex-M4 with FPU, MPU, DSP instructions, ART Accelerator
• Up to 1 MB Flash (2 banks), up to 128 KB SRAM (32 KB with hardware parity)
• FlexPowerControl low-power modes, BOR, 4 μs wakeup from Stop
• 3× 12-bit ADC (5 Msps), 2× 12-bit DAC, 2× op-amps with PGA, 2× comparators
• 6× USART, 3× I2C FM+, 3× SPI, 2× SAI, CAN 2.0B, SDMMC, SWPMI, Quad SPI
• External memory interface (SRAM, PSRAM, NOR, NAND)
• 14-channel DMA, 16 timers, RTC with calendar, true RNG, CRC, 96-bit unique ID
• Up to 24 capacitive sensing channels
• Up to 114 fast I/Os, most 5 V-tolerant
• SWD, JTAG, Embedded Trace Macrocell

Applications:

• Ultra-low-power battery-powered embedded systems
• Audio and analog signal acquisition applications

Package:

• LQFP64 (STM32L471RCT6 is the 64-pin LQFP variant)
• Other family packages: LQFP100, LQFP144, UFBGA132

• Ultra-low-power with FlexPowerControl
• -1.71 V to 3.6 V power supply
• --40 °C to 85/105/125 °C temperature range
• -300 nA in V BAT mode: supply for RTC and 32x32-bit backup registers
• -30 nA Shutdown mode (5 wakeup pins)
• -120 nA Standby mode (5 wakeup pins)
• -420 nA Standby mode with RTC
• -1.1 μA Stop 2 mode, 1.4 μA Stop 2 with RTC
• -100 μA/MHz run mode
• -Batch acquisition mode (BAM)
• -4 μs wakeup from Stop mode
• -Brown out reset (BOR) in all modes except shutdown
• -Interconnect matrix
• Core: ARM ® 32-bit Cortex ® -M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS/1.25DMIPS/MHz (Dhrystone 2.1), and DSP instructions
• Clock Sources
• -4 to 48 MHz crystal oscillator
• -32 kHz crystal oscillator for RTC (LSE)
• -Internal 16 MHz factory-trimmed RC (±1%)
• -Internal low-power 32 kHz RC (±5%)
• -Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25 % accuracy)
• -3 PLLs for system clock, audio, ADC
• RTC with HW calendar, alarms and calibration
• Up to 24 capacitive sensing channels: support touchkey, linear and rotary touch sensors
• 16x timers: 2 x 16-bit advanced motor-control, 2 x 32-bit and 5 x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer
• Up to 114 fast I/Os, most 5 V-tolerant, up to 14 I/Os with independent supply down to 1.08 V

February 2016

DocID027226 Rev 1

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Figure 5. STM32L471Zx LQFP144 pinout (1)

The definition and values of input/output AC characteristics are given in Figure 22 and Table 60 , respectively.

Unless otherwise specified, the parameters given are derived from tests performed under the ambient temperature and supply voltage conditions summarized in Table 22: General operating conditions .

Table 60. I/O AC characteristics (1)(2)

Table 60. I/O AC characteristics (1)(2)

199

Table 60. I/O AC characteristics (1)(2) (continued)

1. This value represents the I/O capability but the maximum system frequency is limited to 80 MHz.
2. The fall time is defined between 70% and 30% of the output waveform accordingly to I 2 C specification.

Figure 22. I/O AC characteristics definition (1)

1. Refer to Table 60: I/O AC characteristics .

Stresses above the absolute maximum ratings listed in Table 19: Voltage characteristics , Table 20: Current characteristics and Table 21: Thermal characteristics may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Table 19. Voltage characteristics (1)

1. To sustain a voltage higher than 4 V the internal pull-up/pull-down resistors must be disabled.

2. Include VREF- pin.

199

Table 20. Current characteristics

1. A negative injection is induced by V IN < V SS . I INJ(PIN) must never be exceeded. Refer also to Table 19: Voltage characteristics for the minimum allowed input voltage values.

2. When several inputs are submitted to a current injection, the maximum ∑ |I INJ(PIN) | is the absolute sum of the negative injected currents (instantaneous values).

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK ® packages, depending on their level of environmental compliance. ECOPACK ® specifications, grade definitions and product status are available at: www.st.com . ECOPACK ® is an ST trademark.