Renesas RL78 Series User Manual page 637

RL78/G1D
15.4 RF Modes
15.4.1 RF operation modes
There are the following seven modes for the RF operation mode.
(1) With adaptivity switched off
(1) With adaptivity switched on
(1) Adaptivity
Adaptivity is exclusively for use in operation as a slave device. When adaptivity is enabled, the signal strength is
measured during packet reception and control is applied for transitions to the optimum mode.
There are three power modes: RF low power mode, RF normal mode, and RF high performance mode, which are
selected when the signal strength is high, normal, and low, respectively. Sensing and mode transitions are
automatic when adaptivity is on.
Since adaptivity cannot be used in operation as a master device, be sure to disable it in operation as a master
device.
(2) RF low-power mode
When adaptivity is enabled in operation as a slave device, the signal strength is measured during packet reception.
If the signal is strong, the RF unit is automatically placed in RF low-power mode after a packet is received. This
mode saves power, and is optimal for applications such as reception over short or middle distances where the
signal strength between the master and slave devices is sufficiently high.
(3) RF high performance mode
When adaptivity is enabled in operation as a slave device, the signal strength is measured during packet reception.
If the signal strength is low, the RF unit is automatically placed in RF high performance mode after a packet is
received.
This mode has improved RF characteristics to handle low signal intensities and is optimal for applications such as
reception over middle or long distances where the signal strength between the master and slave devices tends to
be low.
(4) RF normal mode
When adaptivity is enabled in operation as a slave device, the signal strength is measured during packet reception.
If the signal strength is medium, the RF unit is automatically placed in RF normal mode after a packet is received.
This mode balances the features of the RF low power and high-performance modes, which respectively emphasize
saving power and improving the RF characteristics. This mode is optimum for applications such as reception over
short or middle distances where the signal strength between the master and slave devices is maintained at a
certain level. Note that operation is fixed to this mode when adaptivity is switched off.
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
Figure 15-5. List of RF Operating Modes
(4) RF normal mode
(2) RF low-power mode
(3) RF high performance mode
(4) RF normal mode
CHAPTER 15 RF TRANSCEIVER
(5) RF transmission mode
(6) RF reception mode
(7) SETUP_RF mode
(5) RF transmission mode
(6) RF reception mode
(7) SETUP_RF mode
(5) RF transmission mode
(6) RF reception mode
(7) SETUP_RF mode
(5) RF transmission mode
(6) RF reception mode
(7) SETUP_RF mode
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