STM32L151C6 STMicroelectronics, STM32L151C6 Datasheet - Page 18

• Manufacturer Part Number: STM32L151C6
• Description: Ultra-low-power ARM Cortex-M3 MCU with 32 Kbytes Flash, 32 MHz CPU, LCD, USB
• Manufacturer: STMicroelectronics

Specifications of STM32L151C6

• Operating Power Supply Range: 1.65 V to 3.6 V (without BOR) or 1.8 V to 3.6 V (with BOR option)
• Temperature Range: –40 to 85 °C
• 4 Modes: Sleep, Low-power run (9 μA at 32 kHz), Low-power sleep (4.4 μA),Stop with RTC (1.45 μA), Stop (570 nA), Standby (300 nA)
• Ultralow Leakage Per I/o: 50 nA
• Fast Wakeup From Stop: 8 μs
• Core: ARM 32-bit Cortex™-M3 CPU
• Dma: 7-channel DMA controller, supporting timers, ADC, SPIs, I2Cs and USARTs

Functional overview
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Low power real-time clock and backup registers
The real-time clock (RTC) is an independent BCD timer/counter. Dedicated registers contain
the second, minute, hour (12/24 hour), week day, date, month, year, in BCD (binary-coded
decimal) format. Correction for 28, 29 (leap year), 30, and 31 day of the month are made
automatically. The RTC provides a programmable alarm and programmable periodic
interrupts with wakeup from Stop and Standby modes.
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The RTC can be calibrated with an external 512 Hz output, and a digital compensation
circuit helps reduce drift due to crystal deviation.
There are twenty 32-bit backup registers provided to store 80 bytes of user application data.
They are cleared in case of tamper detection.
GPIOs (general-purpose inputs/outputs)
Each of the GPIO pins can be configured by software as output (push-pull or open-drain), as
input (with or without pull-up or pull-down) or as peripheral alternate function. Most of the
GPIO pins are shared with digital or analog alternate functions, and can be individually
remapped using dedicated AFIO registers. All GPIOs are high-current-capable. The
alternate function configuration of I/Os can be locked if needed following a specific
sequence in order to avoid spurious writing to the I/O registers. The I/O controller is
connected to the AHB with a toggling speed of up to 16 MHz.
External interrupt/event controller (EXTI)
The external interrupt/event controller consists of 23 edge detector lines used to generate
interrupt/event requests. Each line can be individually configured to select the trigger event
(rising edge, falling edge, both) and can be masked independently. A pending register
maintains the status of the interrupt requests. The EXTI can detect an external line with a
pulse width shorter than the Internal APB2 clock period. Up to 83 GPIOs can be connected
to the 16 external interrupt lines.
The programmable wakeup time ranges from 120 µs to 36 hours
Stop mode consumption with LSI and Auto-wakeup: 1.2 µA (at 1.8 V) and 1.4 µA (at
3.0 V)
Stop mode consumption with LSE, calendar and Auto-wakeup: 1.3 µA (at 1.8V), 1.6 µA
(at 3.0 V)
Doc ID 17659 Rev 6
STM32L151xx, STM32L152xx