SPIRIT1 datasheet(33/94 Pages) STMICROELECTRONICS

Teilenummer	SPIRIT1

Bauteilbeschribung	Low data rate, low power sub-1GHZ transceiver

PDF	94 Pages

Scroll/Zoom	100%

Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

33 / 94 page

SPIRIT1

Operating modes

Doc ID 022758 Rev 3

33/94

MCU finishes sending out data to be transmitted, and would end when MCU expects that its

transmission takes place, which would occur after a period of CCA.

The choice of making CCA persistent should come from trading off transmission latency,

under the direct control of the MCU, and power consumption, which would be greater due to

a busy wait in reception mode.

The overall CSMA/CA flowchart is shown in Figure 6, where Tcca and Tlisten are two of the

parameters controlling the clear channel assessment procedure. Design practice

recommends that these parameters average the channel energy over a certain period

expressed as a multiple of the bit period (Tcca) and repeat such measurement several times

covering longer periods (Tlisten). The measurement is performed directly by checking the

carrier sense (CS) generated by the receiver module.

SPIRIT1 Datenblatt(PDF) 33 Page - STMicroelectronics