UPMU-M3L1xLCD-B-EK Silicon Labs, UPMU-M3L1xLCD-B-EK Datasheet - Page 46

• Manufacturer Part Number: UPMU-M3L1xLCD-B-EK
• Description: Daughter Cards & OEM Boards UDP SiM3L1xx MCU Card (with LCD)
• Manufacturer: Silicon Labs

Specifications of UPMU-M3L1xLCD-B-EK

• Product: MCU Cards
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Description/function: MCU Card (with Static LCD) to use with UDP Motherboard
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Tool Is For Evaluation Of: SiM3L1xx
• For Use With: SiM3L1xx

SiM3L1xx
4.6.6. Low Power Mode Advanced Capture Counter (ACCTR0)
The SiM3L1xx devices contain a low-power Advanced Capture Counter module that runs from the RTC0 clock
domain and can be used with digital inputs, switch topology circuits (reed switches), or with LC resonant circuits.
For switch topology circuits, the module charges one or two external lines by pulsing internal pull-up resistors and
detecting whether the reed switch is open or closed. For LC resonant circuits, the inputs are periodically energized
to produce a dampened sine wave and configurable discriminator circuits detect the resulting decay time-constant.
The advanced capture counter has the following general features:
The advanced capture counter has the following features for switch circuit topologies:
For LC resonant circuit topologies, the advanced capture counter includes:
All devices in the SiM3L1xx family include the low power mode advanced capture counter (ACCTR0). Table 4.2
lists the supported inputs and outputs for each of the packages.
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Supports a configurable excitation pulse width based on a 40 MHz oscillator and timer or an external digital
Single or differential inputs supporting single, dual, and quadrature modes of operation.
Variety of interrupt and PM8 wake up sources.
Provides feedback of the direction history, current and previous states, and condition flags.
Ultra low power input comparators.
Supports a wide range of pull-up resistor values with a self-calibration engine.
Asymmetrical integrators for low-pass filtering and switch debounce.
Two 24-bit counters and two 24-bit digital threshold comparators.
Supports switch flutter detection.
Separate minimum and maximum count registers and polarity, pulse, and toggle controls.
Zone-based programmable timing.
Two input comparators with support for a positive side input bias at VIO divided by 2.
stop signal.
Two 8-bit peak counters that saturate at full scale for detecting the number of LC resonant peaks.
Two discriminators with programmable thresholds.
Supports a sample and hold mode for Wheatstone bridges.
Table 4.2. SiM3L1xx Supported Advanced Capture Counter Inputs and Outputs
ACCTR0_LCBIAS0
ACCTR0_LCBIAS1
ACCTR0_LCPUL0
ACCTR0_LCPUL1
ACCTR0_STOP0
ACCTR0_STOP1
ACCTR0_LCIN0
ACCTR0_LCIN1
ACCTR0_DBG0
ACCTR0_DBG1
ACCTR0_IN0
ACCTR0_IN1
Input/Output
SiM3L1x7
Rev 0.5
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SiM3L1x6
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SiM3L1x4
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