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ATA5429-PLSW Datasheet(PDF) 49 Page - ATMEL Corporation

Part # ATA5429-PLSW
Description  UHF ASK/FSK Transceiver
PDF  100 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATA5429-PLSW Datasheet(HTML) 49 Page - ATMEL Corporation

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4841D–WIRE–10/07
ATA5423/ATA5425/ATA5428/ATA5429
8.
Transceiver Configuration
The configuration of the transceiver takes place via a 4-wire serial interface (CS, SCK,
SDI_TMDI, SDO_TMDO) and is organized in 8-bit units. The configuration is initiated with an
8-bit command. While shifting the command into pin SDI_TMDI, the number of bytes in the
TX/RX data buffer are available on pin SDO_TMDO. The read and write commands are followed
by one or more 8-bit data units. Each 8-bit data transmission begins with the MSB. The serial
interface is in the reset state if the level on pin CS = Low.
8.1
Command: Read TX/RX Data Buffer
During a RX operation, the user can read the received bytes in the TX/RX data buffer
successively.
Figure 8-1.
Read TX/RX Data Buffer
8.2
Command: Write TX/RX Data Buffer
During a TX operation the user can write the bytes in the TX/RX data buffer successively. An
echo of the command and the TX data bytes are provided for the microcontroller on pin
SDO_TMDO.
Figure 8-2.
Write TX/RX Data Buffer
8.3
Command: Read Control/Status Register
The control and status registers can be read individually or successively.
Figure 8-3.
Read Control/Status Register
SCK
CS
SDO_TMDO
SDI_TMDI
RX Data Byte 1
RX Data Byte 1
No. Bytes in the TX/RX Data Buffer
Command: Read TX/RX Data Buffer
X
MSB
MSB
LSB
LSB
LSB
MSB
X
SCK
CS
SDO_TMDO
SDI_TMDI
TX Data Byte 1
Write TX/RX Data Buffer
No. Bytes in the TX/RX Data Buffer
Command: Write TX/RX Data Buffer
TX Data Byte 1
MSB
MSB
LSB
LSB
LSB
MSB
TX Data Byte 2
SCK
CS
SDO_TMDO
SDI_TMDI
Data C/S Register X
Data C/S Register Y
No. Bytes in the TX/RX Data Buffer
Command: Read C/S Register X
MSB
MSB
LSB
LSB
LSB
MSB
Command: Read C/S Register Z
Command: Read C/S Register Y



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