ATA5811_06 ATMEL [ATMEL Corporation], ATA5811_06 Datasheet - Page 46

• Manufacturer Part Number: ATA5811_06
• Description: UHF ASK/FSK TRANSCEIVER
• Manufacturer: ATMEL [ATMEL Corporation]

10. Transceiver Configuration
10.1
Figure 10-1. Read TX/RX Data Buffer
10.2
Figure 10-2. Write TX/RX Data Buffer
46
Command: Read TX/RX Data Buffer
Command: Write TX/RX Data Buffer
ATA5811/ATA5812
SDO_TMDO
SDO_TMDO
SDI_TMDI
SDI_TMDI
SCK
SCK
CS
CS
Command: Read TX/RX Data Buffer
Command: Write TX/RX Data Buffer
MSB
Nr. Bytes in the TX/RX Data Buffer
MSB
Nr. Bytes in the TX/RX Data Buffer
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 a 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 reset state if the level on pin CS = Low.
During a RX operation the user can read the received bytes in the TX/RX data buffer
successively.
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.
LSB
LSB
MSB
MSB
Write TX/RX Data Buffer
RX Data Byte 1
TX Data Byte 1
X
LSB
LSB
MSB
MSB
RX Data Byte 2
TX Data Byte 2
TX Data Byte 1
X
LSB
LSB
4689F–RKE–08/06