参数资料
型号: STM32F205RET7XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 120 MHz, RISC MICROCONTROLLER, PQFP64
封装: 10 X 10 MM, ROHS COMPLIANT, LQFP-64
文件页数: 77/163页
文件大小: 2275K
代理商: STM32F205RET7XXX
Description
STM32F205xx, STM32F207xx
Doc ID 15818 Rev 7
2.2.14
Boot modes
At startup, boot pins are used to select one out of three boot options:
Boot from user Flash
Boot from system memory
Boot from embedded SRAM
The boot loader is located in system memory. It is used to reprogram the Flash memory by
using USART1 (PA9/PA10), USART3 (PC10/PC11 or PB10/PB11), CAN2 (PB5/PB13), USB
OTG FS in Device mode (PA11/PA12) through DFU (device firmware upgrade).
2.2.15
Power supply schemes
VDD = 1.8 to 3.6 V: external power supply for I/Os and the internal regulator (when
enabled), provided externally through VDD pins. On WLCSP package, VDD ranges from
1.65 to 3.6 V.
VSSA, VDDA = 1.8 to 3.6 V: external analog power supplies for ADC, DAC, Reset blocks,
RCs and PLL. VDDA and VSSA must be connected to VDD and VSS, respectively.
VBAT = 1.65 to 3.6 V: power supply for RTC, external clock, 32 kHz oscillator and
backup registers (through power switch) when VDD is not present.
Refer to Figure 17: Power supply scheme for more details.
Note:
VDD/VDDA minimum value of 1.65 V is obtained when the device operates in a reduced
temperature range.
2.2.16
Power supply supervisor
The device has an integrated power-on reset (POR) / power-down reset (PDR) circuitry
coupled with a Brownout reset (BOR) circuitry. At power-on, BOR is always active, and
ensures proper operation starting from 1.8 V. After the 1.8 V BOR threshold is reached, the
option byte loading process starts, either to confirm or modify default thresholds, or to
disable BOR permanently. Three BOR thresholds are available through option bytes.
The device remains in reset mode when VDD is below a specified threshold, VPOR/PDR or
VBOR, without the need for an external reset circuit. On devices in WLCSP package, BOR
can be inactivated by setting IRROFF to VDD (see Section 2.2.17: Voltage regulator).
The device also features an embedded programmable voltage detector (PVD) that monitors
the VDD/VDDA power supply and compares it to the VPVD threshold. An interrupt can be
generated when VDD/VDDA drops below the VPVD threshold and/or when VDD/VDDA is higher
than the VPVD threshold. The interrupt service routine can then generate a warning
message and/or put the MCU into a safe state. The PVD is enabled by software.
相关PDF资料
PDF描述
STM32F205REY6XXX 32-BIT, FLASH, 120 MHz, RISC MICROCONTROLLER, PBGA66
STM32F205RFT6TR 32-BIT, FLASH, 120 MHz, RISC MICROCONTROLLER, PQFP64
STM32F205RFT7XXX 32-BIT, FLASH, 120 MHz, RISC MICROCONTROLLER, PQFP64
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