RFbeam Microwave GmbH

RSP1 Radar Processor

Datasheet

7 Interfaces

RSP1 provides different interfaces for configuration and control signals. RSP1 can be used as a stand-

alone processor or in conjunction with a host controller.

•

Command interface:

Standard UART interface for parameter settings with 38'400Baud.

•

Debug Interface:

High speed UART interface for debug purposes with 460'800Baud

(Parameter S06).

This interface acts also as bootloader interface for software updates.

•

Digital I/O:

Control signals for status LED, digital outputs and optional SPI interface.

7.1 Analog I/O

Please refer to chapter 14 Sample Schematics for details of analog signal handling.

Range of RADAR input signals depend on the internal gain setting by parameter S09:

S09 = 0: range 3.3Vpp; S09 = 4: 200mVpp.

Pin

Function

Remark

AVcc

Power supply for chip analog section

Decouple well: see Fig. 14

RADAR_AREF

ADC reference voltage

Vcc/2 (1.65V), connect to RADAR_COMMON

RADAR_COMMON

Input reference voltage

Vcc/2 /1.65V) decoupling see Fig. 14

RADAR_I1

Radar in-phase signal (I)

Signal referenced to RADAR_COMMON

RADAR_Q1

Radar in-phase signal (Q)

Signal referenced to RADAR_COMMON

ALT_RADAR_I1

Alternative Radar I input

selected by parameter S01

ALT_RADAR_Q1

Alternative Radar I input

selected by parameter S01

ALT_RADAR_COMMON

Input reference voltage

connect to RADAR_COMMON

HOLD_POT

Optional hold time setting

Range 0 to Vcc/2. Function must be enabled by param. S07

SENS_POT

Optional sensitivity setting

Range 0 to Vcc/2. Function must be enabled by param. S06

7.2 Digital I/O

All digital inputs have internal pull-down resistors and are high active.

Secondary pin functions (IDx) are reserved for future versions.

7.2.1 Mode settings

- Input SETTING_MODE must be tied to Vcc in order to activate the setting inputs.

- Setting inputs are sampled at power ON only

- Settings can be over-written by sending similar software parameter commands

Pin

Function, if high (3.3V)

Remark

SENSOR_MONO

1 channel sensor connected

e.g. K-LC1a, K-LC3

DIR_MONO

no directional processing

detect both movement directions with I/Q sensors also

DIR_BACKWARD

detect receding movements only

DIR_MONO input must be low / left open

IMMUNITY

set extended interference immunity

SETTING_MODE

enable setting inputs

if low or left open, setting inputs have no effect

© RFbeam Microwave GmbH www.rfbeam.ch

December 11, 2015

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