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STM32F103R4T7TR 参数 Datasheet PDF下载

STM32F103R4T7TR图片预览
型号: STM32F103R4T7TR
PDF下载: 下载PDF文件 查看货源
内容描述: 基于ARM的低密度高性能线的32位MCU,具有16或32 KB闪存, USB , CAN ,6个定时器, 2的ADC ,6个通信接口 [Low-density performance line, ARM-based 32-bit MCU with 16 or 32 KB Flash, USB, CAN, 6 timers, 2 ADCs, 6 communication interfaces]
分类和应用: 闪存微控制器和处理器外围集成电路通信时钟
文件页数/大小: 80 页 / 1067 K
品牌: STMICROELECTRONICS [ ST ]
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Description  
STM32F103x4, STM32F103x6  
2.3.13  
DMA  
The flexible 7-channel general-purpose DMA is able to manage memory-to-memory,  
peripheral-to-memory and memory-to-peripheral transfers. The DMA controller supports  
circular buffer management avoiding the generation of interrupts when the controller  
reaches the end of the buffer.  
Each channel is connected to dedicated hardware DMA requests, with support for software  
trigger on each channel. Configuration is made by software and transfer sizes between  
source and destination are independent.  
2
The DMA can be used with the main peripherals: SPI, I C, USART, general-purpose and  
advanced-control timers TIMx and ADC.  
2.3.14  
RTC (real-time clock) and backup registers  
The RTC and the backup registers are supplied through a switch that takes power either on  
V
supply when present or through the V  
pin. The backup registers are ten 16-bit  
DD  
BAT  
registers used to store 20 bytes of user application data when V power is not present.  
DD  
The real-time clock provides a set of continuously running counters which can be used with  
suitable software to provide a clock calendar function, and provides an alarm interrupt and a  
periodic interrupt. It is clocked by a 32.768 kHz external crystal, resonator or oscillator, the  
internal low-power RC oscillator or the high-speed external clock divided by 128. The  
internal low-power RC has a typical frequency of 40 kHz. The RTC can be calibrated using  
an external 512 Hz output to compensate for any natural crystal deviation. The RTC features  
a 32-bit programmable counter for long-term measurement using the Compare register to  
generate an alarm. A 20-bit prescaler is used for the time base clock and is by default  
configured to generate a time base of 1 second from a clock at 32.768 kHz.  
2.3.15  
Timers and watchdogs  
The low-density STM32F101xx performance line devices include an advanced-control timer,  
two general-purpose timers, two watchdog timers and a SysTick timer.  
Table 4 compares the features of the advanced-control and general-purpose timers.  
Table 4.  
Timer  
Timer feature comparison  
Counter Counter Prescaler DMA request Capture/compare Complementary  
resolution  
type  
factor  
generation  
channels  
outputs  
Up,  
down,  
Any integer  
between 1  
TIM1  
16-bit  
Yes  
4
Yes  
up/down and 65536  
Up,  
down,  
up/down and 65536  
Any integer  
between 1  
TIM2,  
TIM3  
16-bit  
Yes  
4
No  
16/80  
Doc ID 15060 Rev 3  
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