Application Note

R01AN4968EJ0200 Rev.2.00 Page 1 of 18

Nov.30.2021

RL78/G1H, RAA604S00

Control method of RF front-end components

Introduction

This document describes the control method when using RL78/G1H (LSI chip for sub-GHz-band wireless

communications) and RF front-end components such as switches and amplifiers, and the parameter setting

method using the RF driver.

Although it describes RL78/G1H, RAA604S00 can control RF front-end components by the same method.

Note: The contents of this document are provided as an example for reference and do not guarantee the

signal quality in systems. When implementing this example into an existing system, thoroughly evaluate the

product in the overall system and apply the contents of this document at your own responsibility.

Target Device

RL78/G1H

Contents

1. Overview .................................................................................................................................... 3

2. IB Setting ................................................................................................................................... 3

2.1 phyAgcWaitGainOffset ............................................................................................................................ 5

2.2 phyCcaVth ............................................................................................................................................... 5

2.3 phyCcaVthOffset ..................................................................................................................................... 5

2.4 phyAntennaSwitchEna ............................................................................................................................ 5

2.5 phyAntennaSwitchEnaTiming ................................................................................................................. 6

2.6 phyAntennaSelectTx ............................................................................................................................... 6

2.7 phyGpio0Setting ...................................................................................................................................... 6

2.8 phyGpio3Setting ...................................................................................................................................... 6

2.9 phyRssiOutputOffset ............................................................................................................................... 6

3. Description example of program code ....................................................................................... 7

4. IB setting value and GPIO operation ......................................................................................... 8

4.1 phyAntennaSelectTx ............................................................................................................................... 8

4.2 phyAntennaSwitchEna ............................................................................................................................ 9

4.3 phyGpio0Setting .................................................................................................................................... 10

4.4 phyGpio3Setting .................................................................................................................................... 10

5. Connection example with RF front-end components ............................................................... 11

5.1 SPDT (2-control).................................................................................................................................... 11

5.2 SPDT (1-control).................................................................................................................................... 11

5.3 DPDT (ANT1 port) ................................................................................................................................. 12

5.4 DPDT (ANT2 port) ................................................................................................................................. 12

5.5 Front-end module_SE2435L (ANT1 port) / case1 ................................................................................. 13

RL78/G1H, RAA604S00 Control method of RF front-end components

R01AN4968EJ0200 Rev.2.00 Page 2 of 18

Nov.30.2021

5.6 Front-end module_SE2435L (ANT1 port) / case2 ................................................................................. 13

5.7 Front-end module_SE2435L (ANT2 port) / case1 ................................................................................. 14

5.8 Front-end module_SE2435L (ANT2 port) / case2 ................................................................................. 14

5.9 Front-end module_RFFM6907 (ANT1 port) .......................................................................................... 15

5.10 Front-end module_RFFM6907 (ANT2 port) .......................................................................................... 15

5.11 SPDT (2-control) + external AMP .......................................................................................................... 16

5.12 SPDT (1-control) + external AMP .......................................................................................................... 16

6. Control method when using test program ................................................................................ 17

Revision History .............................................................................................................................. 18