1 Features

• FMCW Transceiver

– Integrated PLL, transmitter, receiver, baseband

and ADC

– 57 - 64GHz coverage With 7GHz continuous

bandwidth

– 4 receive channels and 3 to 4 transmit channels

(AWRL6843 with 3 channels and AWRL6844

with 4 channels)

– 13dBm typical output power per Tx

– 12.5dB typical noise figure

– -89dBc/Hz typical phase noise at 1MHz

– FMCW operation

– 10MHz IF bandwidth, real-only Rx channels

– Ultra-accurate chirp engine based on fractional-

N PLL

– Per transmitter binary phase shifter

• Processing elements

– Arm® R5F® core with double precision FPU

(200MHz)

– Hardware Accelerator (HWA 1.2) for FFT, log

magnitude, and CFAR operations (200MHz)

– C66x DSP (450MHz) for post processing Radar

data

• Supports multiple low-power modes

– Idle mode and deep sleep mode

• Power management

– 1.8V and 3.3V IO support

– Built-in LDO network for enhanced PSRR

– Two power rails for 1.8V IO mode, Three power

rails for 3.3V IO mode

• FCCSP package having 17 x 17 BGA grid, 207

BGA balls; Package size: 9.1mm x 9.1mm

• Built-in calibration and self-test

– Built-in Firmware (ROM)

– Self-Contained on chip calibration system

• Host Interface

– 3 x UART

– 2 x CAN-FD

– 2 x SPI

• LVDS for data transfer of raw ADC sample capture

• Other interfaces available to user application

– QSPI

– I2C

– JTAG

– GPIOs

– PWM Interface

– GPADCs

• Device security

– Programmable embedded hardware security

module (HSM)

– Secure authenticated and encrypted boot

support

– Customer programmable root keys, symmetric

keys (256 bit), asymmetric keys (up to RSA-4K

or ECC-512) with key revocation capability

– Cryptographic hardware accelerators: PKA with

ECC/RSA, AES (up to 256 bit), SHA (up

to 512 bit), TRNG/DRBG and SM2, SM3,

SM4(Chinese Crypto Algorithms)

– ISO21434 Cyber Security certification targeted

• Internal memory

– On-Chip RAM - 2.5MBytes (2MB for

AWRL6843)

– R5F TCMA RAM - 512KB

– R5F TCMB RAM - 256KB

– DSS L2 RAM - 384KB

– DSS L3 RAM - 512KB (available only in

AWRL6844)

– DSS L3 Shared RAM - 896KB (can be shared

with TCMs)

• Functional Safety-Compliant Targeted

– Developed for Functional Safety Applications

– Hardware integrity up to ASIL B targeted

– ISO26262 Functional Saftey certification

targeted

• AEC Q-100 targeted

• Clock source

– 40.0MHz crystal for primary clock

– Supports externally driven clock (Square/Sine)

at 40.0MHz

– 32kHz internal oscillator for low power

operations

• Supports temperature operating conditions

– Junction Temperature Range: –40°C to 140°C

2 Applications

• Interior cabin sensing

• Child presence detection

• Vehicle occupancy detection, localization and

classification

• Vehicle occupant vital sign monitoring

• Intruder detection

• Seat belt reminder

• Gesture based HMI

3 Description

The AWRL684x mmWave Sensor device is TI's low power and Hardware Security Module (HSM) enabled

integrated single chip mmWave sensor based on FMCW radar technology. The device is capable of operation

in the 57GHz to 64GHz band and is designed for various automotive in-cabin use cases. The device also takes

advantage of a low power architecture to enable power-constrained applications. The device is split into the

following four switchable power domains:

1. RF/Analog Sub-System: This block includes all the RF and Analog components required to transmit and

receive the RF signals.

2. Front-End Controller sub-System (FECSS): FECSS contains processor, responsible for radar front-end

configuration, control, and calibration.

3. Application Sub-System (APPSS): APPSS is where the device implements a user programmable ARM

Cortex-R5F allowing for custom control and automotive interface applications. Top Sub-System (TOPSS)

and Hardware Security Module (HSM) is part of the APPSS power domain and contains the clocking and

power management sub-blocks.

4. DSP Sub-Systems (DSS): TI's high-performance C66x DSP is integrated in it for radar signal processing.

The hardware accelerator block (HWA 1.2) supplements the DSP and ARM Cortex-R5F by offloading

common radar processing such as FFT, constant false alarm rate (CFAR), scaling, and compression.

The AWRL684x is specifically designed to be able to dynamically control the power states of the abovementioned

power domains based on application requirements. The device also features various low-power

states. These low-power states are achieved by turning off internal IP blocks of the device. AWRL684x device

also provides the option of retaining memory during these low power states to retain critical information such as

application image and RF profiles across different power modes.

A Hardware Security Module (HSM) is also provisioned in the device (available with secure part variants). The

HSM consists of a programmable Arm Cortex-M4 core and the necessary infrastructure to provide a secure zone

of operation within the device.

Additionally, the device is built with TI’s low power 45nm RF CMOS process and enables unprecedented

levels of integration in an extremely small form factor. AWRL684x is designed for low power, self-monitored,

ultra-accurate radar systems in the automotive space for applications like child presence detection, intrusion

monitoring and occupancy detection.