STM3210B-EVAL STMicroelectronics, STM3210B-EVAL Datasheet - Page 18

• Manufacturer Part Number: STM3210B-EVAL
• Description: BOARD EVALUATION FOR STM32
• Manufacturer: STMicroelectronics
• Type: MCUr

Specifications of STM3210B-EVAL

• Contents: Fully Assembled Evaluation Board
• Processor To Be Evaluated: STM32F10x
• Data Bus Width: 32 bit
• Interface Type: USB
• Operating Supply Voltage: 5 V
• Silicon Manufacturer: ST Micro
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: STM32
• Silicon Family Name: STM32F1xx
• For Use With/related Products: STM32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6048

Running the demonstration
2.2
2.2.1
2.2.2
Note:
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Clock sources
Clock control
The STM32F10xxx internal clocks are derived from the HSE (clocked by the external 8 MHz
crystal).
In this demo application, the different system clocks are configured as follows:
Only the RTC is clocked by a 32 kHz external oscillator.
Clock failure
At any demo level, if no clock is present on OSC_IN (broken or disconnected Crystal), the
message shown in
Figure 11. No HSE clock detected
If the 8 MHz Crystal is not reconnected in the next few seconds, the MCU enters the
Standby mode. If the 8 MHz crystal is reconnected within a few seconds, a system reset is
generated.
The clock security system (CSS) feeds the MCU with the HSI OSC used as an emergency
clock if no clock is detected.
System clock is set to 72 MHz:
(two wait states, Flash Prefetch Buffer Enabled).
HCLK frequency is set to 72 MHz
Timer clock (TIMCLK) is set to 72 MHz
PCLK1 is set to 36 MHz
PCLK2 is set to 72 MHz
USB clock (USBCLK) is set to 48 MHz (internal clock: PLLCLK / 1.5)
Figure 11
is displayed on the LCD screen.
Doc ID 13534 Rev 5
The PLL will be used as the system clock source: 72 MHz
UM0435