ATPL230A datasheet(54/122 Pages) ATMEL

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ATPL230A [DATASHEET]

Atmel-43053J-ATPL230A-Datasheet_22-Sep-16

9.1.1

TxRx Buffers

There are 4 dedicated buffers for transmission (BUF_TX0, BUF_TX1, BUF_TX2 and BUF_TX3) and 4 dedicated

buffers for reception (BUF_RX0, BUF_RX1, BUF_RX2, BUF_RX3). The main features are shown below:

9.1.2

Transmission Branch

PHY layer takes data to be sent from BUF_TXi. The Cyclic Redundancy Check (CRC) fields are hardware-generated

in real time, and properly appended to the transmission data. The rest of the chain is hardware-wired, and performs

automatically all the tasks needed to send data according to PRIME specifications.

In the following figure, the block diagram of the transmission branch is shown.

Figure 9-2.

Transmission Branch

The output is differential modulated using a DBPSK/DQPSK/D8PSK scheme. After modulation, IFFT (Inverse Fourier

Transform) block and cyclic prefix block allow to implement an OFDM scheme.

A Converter and a Power Amplifier Driver is the last block in the transmission branch. This block is responsible for

adjusting the signal to reach the best transmission efficiency, thus reducing consumption and power dissipation.

9.1.3

Reception Branch

The reception branch performs automatically all the tasks needed to process received data. PHY layer delivers data

to MAC layer through the BUF_RXi.

Figure 9-3.

Reception Branch

Table 9-1.

TxRx Buffers features

BUF_TXi

BUF_RXi



Size configurable



Number of buffers enabled configurable



Start time forced or programmed



Transmission can be forced regardless of the carrier

detection and frames reception



Transmission parameters configurable



Error detector



Size configurable



Number of buffers enabled configurable



Enable/Disable interrupts



Parameters saved (BER, RSSI, CINR…)

CRC

Scrambler

Interleaver

IFFT

Convolutional

Encoder

Sub - carrier

Modulator

Cyclic

Prefix

Converter / PAD

From

BUF_TXi

BUF_RXi

Scrambler

Interleaver

Convolutional

Decoder

FFT

Sub - carrier

Demodulator

CRC

Pre - FFT

Syncro

Converter

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