STM32F207ICH6 STMicroelectronics, STM32F207ICH6 Datasheet - Page 21
STM32F207ICH6
Manufacturer Part Number
STM32F207ICH6
Description
ARM Microcontrollers - MCU 32-Bit ARM Cortex M3 CAM 256 kB
Manufacturer
STMicroelectronics
Datasheet
1.STM32F207VFT6TR.pdf
(177 pages)
Specifications of STM32F207ICH6
Product Category
ARM Microcontrollers - MCU
Rohs
yes
Core
ARM Cortex M3
Data Bus Width
32 bit
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STM32F20xxx
2.2.10
2.2.11
2.2.12
Nested vectored interrupt controller (NVIC)
The STM32F20x devices embed a nested vectored interrupt controller able to manage 16
priority levels, and handle up to 81 maskable interrupt channels plus the 16 interrupt lines of
the Cortex™-M3.
The NVIC main features are the following:
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This hardware block provides flexible interrupt management features with minimum interrupt
latency.
External interrupt/event controller (EXTI)
The external interrupt/event controller consists of 23 edge-detector lines used to generate
interrupt/event requests. Each line can be independently configured to select the trigger
event (rising edge, falling edge, both) and can be masked independently. A pending register
maintains the status of the interrupt requests. The EXTI can detect an external line with a
pulse width shorter than the Internal APB2 clock period. Up to 140 GPIOs can be connected
to the 16 external interrupt lines.
Clocks and startup
On reset the 16 MHz internal RC oscillator is selected as the default CPU clock. The
16 MHz internal RC oscillator is factory-trimmed to offer 1% accuracy. The application can
then select as system clock either the RC oscillator or an external 4-26 MHz clock source.
This clock is monitored for failure. If failure is detected, the system automatically switches
back to the internal RC oscillator and a software interrupt is generated (if enabled). Similarly,
full interrupt management of the PLL clock entry is available when necessary (for example if
an indirectly used external oscillator fails).
The advanced clock controller clocks the core and all peripherals using a single crystal or
oscillator. In particular, the ethernet and USB OTG FS peripherals can be clocked by the
system clock.
Several prescalers and PLLs allow the configuration of the three AHB buses, the high-speed
APB (APB2) and the low-speed APB (APB1) domains. The maximum frequency of the three
AHB buses is 120 MHz and the maximum frequency the high-speed APB domains is
60 MHz. The maximum allowed frequency of the low-speed APB domain is 30 MHz.
The devices embed a dedicate PLL (PLLI2S) which allow to achieve audio class
performance. In this case, the I
frequencies from 8 kHz to 192 kHz.
Closely coupled NVIC gives low-latency interrupt processing
Interrupt entry vector table address passed directly to the core
Closely coupled NVIC core interface
Allows early processing of interrupts
Processing of late arriving, higher-priority interrupts
Support tail chaining
Processor state automatically saved
Interrupt entry restored on interrupt exit with no instruction overhead
Doc ID 15818 Rev 9
2
S master clock can generate all standard sampling
Description
21/177
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