MIKROE-1397 mikroElektronika, MIKROE-1397 Datasheet - Page 20

• Manufacturer Part Number: MIKROE-1397
• Description: Development Boards & Kits - ARM mikroMedia Plus for STM32
• Manufacturer: mikroElektronika

Specifications of MIKROE-1397

• Rohs: yes
• Product: Development Systems
• Tool Is For Evaluation Of: STM32
• Core: ARM Cortex M4
• Interface Type: I2C, SPI
• Operating Supply Voltage: 5 V
• Data Bus Width: 32 bit
• Description/function: Development system for the STM32
• Dimensions: 119.54 mm x 78 mm
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 20 C
• For Use With: STM32

5. Crystal oscillator and 2.048V reference
The board is equipped with
crystal oscillator (X5)
provides external clock waveform
to the microcontroller OSCO and OSCI
pins. This base frequency is suitable
for further clock multipliers and ideal for
generation of necessary USB clock, which ensures
proper operation of bootloader and your custom USB-
based applications. The board also contains
kHz crystal oscillator (X4)
for internal RTCC module. Microcontroller ADC requires an accurate
source of reference voltage signal. That is why we provide the external
03
01
voltage reference
to the microcontroller VREF pin which is 2.048V.
circuit that
02
which provides external clock
01
25MHz
02
32.768
03
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Figure 5-1: Crystal oscillator
and 2.048V reference
02
03
01