AT86RF211 datasheet(33/48 Pages) ATMEL

33 / 48 page

AT86RF211

1942C–WIRE–06/02

In reception mode, only one frequency needs to be programmed. In transmission mode,

two different registers (F0 & F1), or (F2 & F3) must be programmed for “0” code and “1”

code transmission. The DATAMSG pin value actually selects the used register. The four

registers can also be set to define two channels, so that the AT86RF211 may switch

quickly from a channel to the other.

Example:

FCHANNEL = 868.3 MHz

IF1 = 10.7 MHz

Deviation = ± 4 kHz

Notes:

1. In reception mode, one of the two frequencies (879 MHz or 857.6 MHz) can be cho-

sen, taking into account external parameters (for example, the noise that brings the

image frequency).

2. Two frequencies are used to transmit data: 868.304 MHz for ”

1” transmission and

868.296 MHz for ”

0” transmission. The polarity of DATAMSG can be swapped using

bit 5 of CTRL1.

Status Register

The STATUS register is used to read the status of internal functions (including the

wake-up function) or the output value of the internal ADC. This register can only be

read.

Mode

Programmed Frequency

FCHANNEL ± IF1

FCHANNEL ± deviation

Mode

FSK

868.3 ± 10.7 = 879 MHz or 857.6 MHz programmed in F2

868.3 ± 0.004 = 868.304 MHz programmed in F1 when DATAMSG = “1”

and 868.296 MHz programmed in F0 when DATAMSG = “0”

Table 10. Status Register Overview

Name

PLLL

MRSSI

MVCC

WAKEUP

MSGERR

nbit

29-24

23-18

Name

MSGDATL

MSGMRATE

nbit

14-10

9-0

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