User's Manual

Skylab M&C Technology Co., Ltd
can be interfaced through the PPI at the same time is limited by the number of GPIOTE channels
7、All pins can be individually configured to carry serial interface or quadrature demodulator signals
8、All pins can be configured as PWM signal.
9、There are 6 ADC/LPCOMP input in the 20 I/Os.
Two-wire Interface (I2C Compatible)
The two-wire interface can communicate with a bi-directional wired-AND bus with two lines (SCL, SDA).
The protocol makes it possible to interconnect up to 127 individually addressable devices. The interface is
capable of clock stretching, supporting data rates of 100 kbps ,250kbps and 400 kbps. The module has 2
TWI ports and they properties like following table.
Instance Master/Slave
TWI0 Master
TWI1 Master
TWI Pin Share Scheme
Note：I2C:Inter－Integrated Circuit
Flash Program I/Os
The module has two programmer pins, respectively SWDCLK pin and SWDIO pin. The two pin Serial Wire
Debug (SWD) interface provided as a part of the Debug Access Port (DAP) offers a flexible and powerful
mechanism for non-intrusive debugging of program code. Breakpoints and single stepping are part of this
support.
Serial Peripheral Interface
The SPI interfaces enable full duplex synchronous communication between devices. They support a
three-wire (SCK, MISO, MOSI) bi-directional bus with fast data transfers. The SPI Master can
communicate with multiple slaves using individual chip select signals for each of the slave devices attached
to a bus. Control of chip select signals is left to the application through use of GPIO signals. SPI Master has
double buffered I/O data. The SPI Slave includes EasyDMA for data transfer directly to and from RAM
allowing Slave data transfers to occur while the CPU is IDLE. The GPIOs are used for each SPI interface
line can be chosen from any GPIOs on the device and configed independently. This enables great flexibility
in device pinout and efficient use of printed circuit board space and signal routing.
The SPI peripheral support SPI mode 0,1,2,and 3.The module have 3 SPI ports and theirs they properties are
as below:
Bluetooth Module
SKB501- User Manual