EFM8SB10F8G-A-CSP16 datasheet(6/55 Pages) SILABS

Part #	EFM8SB10F8G-A-CSP16

Description	The EFM8SB1 highlighted features are listed below

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Manufacturer	SILABS [Silicon Laboratories]

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3.5 Counters/Timers and PWM

Real Time Clock (RTC0)

The RTC is an ultra low power, 36 hour 32-bit independent time-keeping Real Time Clock with alarm. The RTC has a dedicated 32 kHz

oscillator. No external resistor or loading capacitors are required, and a missing clock detector features alerts the system if the external

crystal fails. The on-chip loading capacitors are programmable to 16 discrete levels allowing compatibility with a wide range of crystals.

The RTC module includes the following features:

• Up to 36 hours (32-bit) of independent time keeping.

• Support for internal 16.4 kHz low frequency oscillator (LFOSC0) or external 32 kHz crystal (crystal not available on CSP16 pack-

ages).

• Internal crystal loading capacitors with 16 levels.

• Operation in the lowest power mode and across the full supported voltage range.

• Alarm and oscillator failure events to wake from the lowest power mode or reset the device.

• Buffered clock output available for other system devices even in the lowest power mode.

Programmable Counter Array (PCA0)

The programmable counter array (PCA) provides multiple channels of enhanced timer and PWM functionality while requiring less CPU

intervention than standard counter/timers. The PCA consists of a dedicated 16-bit counter/timer and one 16-bit capture/compare mod-

ule for each channel. The counter/timer is driven by a programmable timebase that has flexible external and internal clocking options.

Each capture/compare module may be configured to operate independently in one of five modes: Edge-Triggered Capture, Software

Timer, High-Speed Output, Frequency Output, or Pulse-Width Modulated (PWM) Output. Each capture/compare module has its own

associated I/O line (CEXn) which is routed through the crossbar to port I/O when enabled.

• 16-bit time base.

• Programmable clock divisor and clock source selection.

• Up to three independently-configurable channels

• 8, 9, 10, 11 and 16-bit PWM modes (edge-aligned operation).

• Frequency output mode.

• Capture on rising, falling or any edge.

• Compare function for arbitrary waveform generation.

• Software timer (internal compare) mode.

• Integrated watchdog timer.

Timers (Timer 0, Timer 1, Timer 2, and Timer 3)

Several counter/timers are included in the device: two are 16-bit counter/timers compatible with those found in the standard 8051, and

the rest are 16-bit auto-reload timers for timing peripherals or for general purpose use. These timers can be used to measure time inter-

vals, count external events and generate periodic interrupt requests. Timer 0 and Timer 1 are nearly identical and have four primary

modes of operation. The other timers offer both 16-bit and split 8-bit timer functionality with auto-reload and capture capabilities.

Timer 0 and Timer 1 include the following features:

• Standard 8051 timers, supporting backwards-compatibility with firmware and hardware.

• Clock sources include SYSCLK, SYSCLK divided by 12, 4, or 48, the External Clock divided by 8, or an external pin.

• 8-bit auto-reload counter/timer mode

• 13-bit counter/timer mode

• 16-bit counter/timer mode

• Dual 8-bit counter/timer mode (Timer 0)

Timer 2 and Timer 3 are 16-bit timers including the following features:

• Clock sources include SYSCLK, SYSCLK divided by 12, or the External Clock divided by 8.

• 16-bit auto-reload timer mode

• Dual 8-bit auto-reload timer mode

• Comparator 0 or RTC0 capture (Timer 2)

• RTC0 or EXTCLK/8 capture (Timer 3)

EFM8SB1 Data Sheet

System Overview

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Rev. 1.2 | 5

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