Data Sheet

DATA SHEET | SENTIMATE

• Low-Energy Sensor Interface (LESENSE)

• Multi-channel Capacitive Sense Interface (CSEN)

• 32 pins connected to analog channels (APORT) shared between analog peripherals

• 32 General Purpose I/O pins with output state retention and asynchronous interrupts

• 8 Channel DMA Controller

• 12 Channel Peripheral Reflex System (PRS)

• 2 × 16-bit Timer/Counter

• 3 or 4 Compare/Capture/PWM channels

• 1 × 32-bit Timer/Counter

• 3 Compare/Capture/PWM channels

• 32-bit Real Time Counter and Calendar

• 16-bit Low Energy Timer for waveform generation

• 32-bit Ultra Low Energy Timer/Counter for periodic wake-up from any Energy Mode

• 16-bit Pulse Counter with asynchronous operation

• 2 × Watchdog Timer

• 3 × Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard (ISO

7816)/IrDA/I2S)

• Low Energy UART (LEUART ™)

• 2 × I2C interface with SMBus support and address recognition in EM3 Stop

Wide Operating Range

• 1.8 V to 3.8 V single power supply

• Integrated DC-DC

For more information about this module see this link: https://www.silabs.com/documents/public/data-

sheets/zgm130s-datasheet.pdf

4.4. Power supply

SENTIMATE integrate a very efficient power supply system based on Analog Devices’ Power by Linear power manage-

ment ICs.

The power stage has to be ultra low power and high efficiency when the system is powered from battery and wide range

and high efficiency when powered from an external DC voltage source. In both the options of power input the system

has to work selecting the proper stabilized voltage that is generated from one input or the other. Obviously in case of

external power supply and battery present the system has to be powered from the external DC source in order to pre-

vent the discharge of the battery that becomes active through the power path only when the external source is missing.

Below the block diagram of the input power stage of the SENTIMATE in which the two path are shown, each one get its

voltage input and generates 3,3V and a power path select which one has to be the general 3,3V of the entire board.

4.4.1. Battery input path

For high efficiency and ultra low power has been selected the ADI LTC3106 that is a buck-boost switching regulator, with

the following features.

• Dual Input Buck-Boost with Integrated PowerPath™ Manager

• Ultralow Start-Up Voltages: 850mV Start with No Backup Source, 300mV with a Backup Source