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| 型号： | STM32L151C8U6TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, QCC48 |
| 封装： | 7 X 7 MM, 0.50 MM PITCH, ROHS COMPLIANT, VFQFPN-48 |
| 文件页数： | 15/106页 |
| 文件大小： | 1417K |
| 代理商： | STM32L151C8U6TR |
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Functional overview
STM32L151xx, STM32L152xx
Doc ID 17659 Rev 1
The boot loader is located in System Memory. It is used to reprogram the Flash memory by
using USART1 or USART2. For further details please refer to AN2606.
3.4
Clock management
The clock controller distributes the clocks coming from different oscillators to the core and
the peripherals. It also manages clock gating for low power modes and ensures clock
robustness. It features:
●
Clock prescaler: to get the best tradeoff between speed and current consumption, the
clock frequency to the CPU and peripherals can be adjusted by a programmable
prescaler
●
Safe clock switching: clock sources can be changed safely on the fly in run mode
through a configuration register.
●
Clock management: to reduce power consumption, the clock controller can stop the
clock to the core, individual peripherals or memory.
●
Master clock source: three different clock sources can be used to drive the master
clock:
–
1-24 MHz high-speed external crystal (HSE), that can supply a PLL
–
16 MHz high-speed internal RC oscillator (HSI), trimmable by software, that can
supply a PLL
–
Multispeed internal RC oscillator (MSI), trimmable by software, able to generate 7
frequencies (64 kHz, 128 kHz, 256 kHz, 512 kHz, 1.02 MHz, 2.05 MHz, 4.1 MHz)
with a consumption proportional to speed, down to 750 nA typical. When a
32.768 kHz clock source is available in the system (LSE), the MSI frequency can
be trimmed by software down to a ±0.5% accuracy.
●
Auxiliary clock source: two ultralow power clock sources that can be used to drive the
LCD controller and the real-time clock:
–
32.768 kHz low-speed external crystal (LSE)
–
37 kHz low-speed internal RC (LSI), also used to drive the independent watchdog.
The LSI clock can be measured using the high-speed internal RC oscillator for
greater precision.
●
RTC and LCD clock sources: the LSI, LSE or HSE sources can be chosen to clock
the RTC and the LCD, whatever the system clock.
●
USB clock source: the embedded PLL has a dedicated 48 MHz clock output to supply
the USB interface.
●
Startup clock
: after reset, the microcontroller restarts by default with an internal 2 MHz
clock (MSI). The prescaler ratio and clock source can be changed by the application
program as soon as the code execution starts.
●
Clock security system (CSS): this feature can be enabled by software. If a HSE clock
failure occurs, the master clock is automatically switched to HSI and a software
interrupt is generated if enabled.
●
Clock-out capability (MCO: microcontroller clock output): it outputs one of the
internal clocks for external use by the application.
Several prescalers allow the configuration of the AHB frequency, the high-speed APB
(APB2) and the low-speed APB (APB1) domains. The maximum frequency of the AHB and
the APB domains is 32 MHz. See Figure 2 for details on the clock tree.
相关PDF资料 |
PDF描述 |
|---|---|
| STM32L151R8H6 | 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PBGA64 |
| STM32L151VBT6D | 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PQFP100 |
| STM32L151VBH6TR | 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PBGA100 |
| STM32L151V8T6TR | 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PQFP100 |
| STM32L151V8T6D | 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PQFP100 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| STM32L151CBT6 | 功能描述:ARM微控制器 - MCU 32-Bit Arm Cortex M3 128kb UltralowPower RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT |
| STM32L151CBT6A | 功能描述:IC MCU 32BIT 128KB FLASH 48LQFP 制造商:stmicroelectronics 系列:STM32L1 包装:托盘 零件状态:在售 核心处理器:ARM? Cortex?-M3 核心尺寸:32-位 速度:32MHz 连接性:I2C，IrDA，LIN，SPI，UART/USART，USB 外设:欠压检测/复位，DMA，I2S，POR，PWM，WDT I/O 数:37 程序存储容量:128KB（128K x 8） 程序存储器类型:闪存 EEPROM 容量:4K x 8 RAM 容量:16K x 8 电压 - 电源（Vcc/Vdd）:1.8 V ~ 3.6 V 数据转换器:A/D 16x12b，D/A 2x12b 振荡器类型:内部 工作温度:-40°C ~ 85°C（TA） 封装/外壳:48-LQFP 供应商器件封装:48-LQFP（7x7） 标准包装:250 |
| STM32L151CBT6TR | 功能描述:ARM微控制器 - MCU 32-Bit ARM Cortex 128kb Low Power MCU RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT |
| STM32L151CBU6 | 功能描述:ARM微控制器 - MCU 32-Bit ARM Cortex 128kb Low Power MCU RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT |
| STM32L151CBU6 | 制造商:STMicroelectronics 功能描述:IC MCU 32 BIT 128KB FLASH 48 UFQFPN |
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