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Name
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S76S/S78S SDK Manual
C
May 3, 2017
9 of 33
2.3.4 SWD
A standard SWD (Serial Wire Debug) port is used for STM32 platform
debugging & flashing. User needs to connect this two SWDIO & SWCLK pins
with ST-LINK/V2 unit (or ULINK). After that, user can use STM32 ST-LINK
Utility or Keil IDE to flash & debug firmware.
The detailed reference about ST-LINK/V2 is located in this below link
http://www.st.com/content/st_com/en/products/development-
2.3.5 USART/UART
The devices embed three universal synchronous/asynchronous receiver
transmitters (USART1, USART2, USART4 and USART5).
The universal synchronous asynchronous receiver transmitter (USART)
offers a flexible means of Full-duplex data exchange with external
equipment requiring an industry standard NRZ asynchronous serial data
format. The USART offers a very wide range of baud rates using a
programmable baud rate generator. It supports synchronous one-way
communication and Half-duplex Single-wire communication, as well as
multiprocessor communications.
High speed data communication is possible by using the DMA (direct
memory access) for multi-buffer configuration.
2.3.6 ADC
One 12-bit analog-to-digital converter is embedded and performing
conversions in the single,
continuous,
scan and dis
continuous
mode. In scan
mode, automatic conversion is performed on a selected group of analog
inputs. The analog watchdog feature allows the application to detect if the
input voltage goes outside the user-defined higher or lower thresholds
The detailed reference about ADC is located in this below link:
http://www.st.com/content/ccc/resource/technical/document/reference_
converter (ADC)
2.3.7 SPI
The SPI/I²S interface can be used to communicate with external devices
using the SPI protocol or the I2S audio protocol. SPI or I2S mode is
selectable by software. SPI mode is selected by default after a device reset.
The serial peripheral interface (SPI) protocol supports half-duplex, full-
duplex and simplex synchronous, serial communication with external
devices. The interface can be configured as master and in this case it
provides the communication clock (SCK) to the external slave device. The
interface is also capable of operating in multi-master configuration
The detailed reference about SPI is located in this below link:
http://www.st.com/content/ccc/resource/technical/document/reference_
interface/ inter-IC sound (SPI/I2S)
2.3.8 NRST
