EFM8SB1 Datasheet, PDF (8/55 Pages) Silicon Laboratories – The EFM8SB1 highlighted features are listed below

EFM8SB1 Data Sheet
System Overview
16-bit CRC (CRC0)
The cyclic redundancy check (CRC) module performs a CRC using a 16-bit polynomial. CRC0 accepts a stream of 8-bit data and posts
the 16-bit result to an internal register. In addition to using the CRC block for data manipulation, hardware can automatically CRC the
flash contents of the device.
The CRC module is designed to provide hardware calculations for flash memory verification and communications protocols. The CRC
module supports the standard CCITT-16 16-bit polynomial (0x1021), and includes the following features:
• Support for CCITT-16 polynomial
• Byte-level bit reversal
• Automatic CRC of flash contents on one or more 256-byte blocks
• Initial seed selection of 0x0000 or 0xFFFF
3.7 Analog
Capacitive Sense (CS0)
The Capacitive Sense subsystem uses a capacitance-to-digital circuit to determine the capacitance on a port pin. The module can take
measurements from different port pins using the module’s analog multiplexer. The module can be configured to take measurements on
one port pin, a group of port pins one-by-one using auto-scan, or the total capacitance on multiple channels together. A selectable gain
circuit allows the designer to adjust the maximum allowable capacitance. An accumulator is also included, which can be configured to
average multiple conversions on an input channel. Interrupts can be generated when the CS0 peripheral completes a conversion or
when the measured value crosses a configurable threshold.
The Capacitive Sense module includes the following features:
• Measure multiple pins one-by-one using auto-scan or total capacitance on multiple channels together.
• Configurable input gain.
• Hardware auto-accumulate and average.
• Multiple internal start-of-conversion sources.
• Operational in Suspend when all other clocks are disabled.
• Interrupts available at the end of a conversion or when the measured value crosses a configurable threshold.
Programmable Current Reference (IREF0)
The programmable current reference (IREF0) module enables current source or sink with two output current settings: Low Power Mode
and High Current Mode. The maximum current output in Low Power Mode is 63 µA (1 µA steps) and the maximum current output in
High Current Mode is 504 µA (8 µA steps).
The IREF module includes the following features:
• Capable of sourcing or sinking current in programmable steps.
• Two operational modes: Low Power Mode and High Current Mode.
• Fine-tuning mode for higher output precision available in conjunction with the PCA0 module.
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