BLUENRG-332VC datasheet(16/67 Pages) STMICROELECTRONICS

Nome de Peças	BLUENRG-332VC

Descrição Electrónicos	Programmable Bluetooth® Low Energy wireless SoC

PDF	67 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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Figure 6. Clock tree

It is possible to output some internal clocks on external pads:

•

The low speed clocks can be output on the LCO I/O

•

The high speed clocks can be output on the MCO I/O

This is possible by programming the associated I/O in the correct alternate function.

Most of the peripherals only use the system clock except:

•

I2C, USART: they use an always 16 MHz clock to have a fixed reference clock for baud rate management.

The goal is to allow the CPU to boost or slow down the system clock (depending on on-going activities)

without impacting a potential on-going serial interface transfer on external I/Os

•

LPUART: always uses a 16 MHz clock or LSE to have a fixed reference clock for baud rate management.

The goal is to allow the CPU to boost or slow down the system clock (depending on on-going activities)

without impacting a potential on-going serial interface transfer on external I/Os.

BlueNRG-LPS

Clock management

DS13819 - Rev 4

page 16/67

BLUENRG-332VC Folha de dados(PDF) 16 Page - STMicroelectronics