Data Sheet

A111 Pulsed Coherent Radar (PCR)
Datasheet, v2.0 prel.
© 2019 Copyright by Acconeer 2019-11-01 Page 14 of 33
6 Functional Description
The below figure shows the A111 system integration with Host MCU:
Host MCU
A111
Sensor
TCXO
ENABLE x1
SPI x4
INTERRUPT x1
1.8V single power supply
CLK ref. 20-80 MHz
Figure 7.1. System integration
The Acconeer software is executed on Host MCU that handles sensor initiation, configuration, sweep
acquisition and signal processing.
The Serial Peripheral Interface (SPI) is a 4-wire serial bus, used for configuration and reading output
from the A111 radar sensor. The A111 radar sensor is an SPI slave device, connected to the SPI
master (Host MCU), and allows several devices to be connected on same SPI bus, with a dedicated
slave-select signal. Daisy-chain is not supported.
The sensor provides support for ENABLE and INTERRUPT as interrupt signal, always output, that is
used as an interrupt in the Host MCU.