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STM32F207IC Datasheet(PDF) 26 Page - STMicroelectronics

Part # STM32F207IC
Description  ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/1284KB RAM
PDF  178 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F207IC Datasheet(HTML) 26 Page - STMicroelectronics

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Functional overview
STM32F20xxx
26/178
DocID15818 Rev 11
Figure 7. Regulator OFF/internal reset OFF
The following conditions must be respected:
•
VDD should always be higher than VCAP_1 and VCAP_2 to avoid current injection
between power domains (see Figure 8).
•
PA0 should be kept low to cover both conditions: until VCAP_1 and VCAP_2 reach 1.08 V,
and until VDD reaches 1.7 V.
•
NRST should be controlled by an external reset controller to keep the device under
reset when VDD is below 1.7 V (see Figure 9).
In this mode, when the internal reset is OFF, the following integrated features are no more
supported:
•
The integrated power-on reset (POR) / power-down reset (PDR) circuitry is disabled.
•
The brownout reset (BOR) circuitry is disabled.
•
The embedded programmable voltage detector (PVD) is disabled.
•
VBAT functionality is no more available and VBAT pin should be connected to VDD.
REGOFF
VCAP_1
ai18477b
VCAP_2
NRST
1.2 V
IRROFF
VDD
1.2 V
VDD
External VDD/VCAP_1/2
power supply supervisor
Ext. reset controller active
when VDD<1.7V and
VCAP_1/2 < 1.08 V
PA0



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