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STM32F405 数据表(PDF) 26 Page - STMicroelectronics

部件名 STM32F405
功能描述  Arm® Cortex®-M4 32b MCUFPU, 210DMIPS, up to 1MB Flash/1924KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera
PDF  204 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STM32F405 数据表(HTML) 26 Page - STMicroelectronics

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Description
STM32F405xx, STM32F407xx
26/203
DS8626 Rev 9
Figure 8. PDR_ON and NRST control with internal reset OFF
1. PDR = 1.7 V for reduce temperature range; PDR = 1.8 V for all temperature range.
2.2.16
Voltage regulator
The regulator has four operating modes:
•
Regulator ON
–
Main regulator mode (MR)
–
Low-power regulator (LPR)
–
Power-down
•
Regulator OFF
Regulator ON
On packages embedding the BYPASS_REG pin, the regulator is enabled by holding
BYPASS_REG low. On all other packages, the regulator is always enabled.
There are three power modes configured by software when regulator is ON:
•
MR is used in the nominal regulation mode (With different voltage scaling in Run)
In Main regulator mode (MR mode), different voltage scaling are provided to reach the
best compromise between maximum frequency and dynamic power consumption.
Refer to Table 14: General operating conditions.
•
LPR is used in the Stop modes
The LP regulator mode is configured by software when entering Stop mode.
•
Power-down is used in Standby mode.
The Power-down mode is activated only when entering in Standby mode. The regulator
output is in high impedance and the kernel circuitry is powered down, inducing zero
consumption. The contents of the registers and SRAM are lost)
MS19009V6
V DD
time
PDR = 1.7 V
time
NRST
PDR_ON
PDR_ON
Reset by other source than
power supply supervisor



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