User guide

ATA5811/ATA5812 [Preliminary]

4689B–RKE–04/04

TX/RX Data Buffer The TX/RX data buffer is used to handle the data transfer during RX and TX operations.

Control Register To use the transceiver in different applications it can be configured by a connected

microcontroller via the 4-wire serial interface.

Control Register 1 (ADR 0)

Table 14. Control Register 1 (Function of Bit 7 and Bit 6 in RX Mode)

IR1 IR0 Function (RX Mode)

Pin IRQ is set to 1 if 4 received bytes are in the TX/RX data buffer or a receiving

error occurred

Pin IRQ is set to 1 if 8 received bytes are in the TX/RX data buffer or a receiving

error occurred

Pin IRQ is set to 1 if 12 received bytes are in the TX/RX data buffer or a receiving

error occurred (default)

1 1 Pin IRQ is set to 1 if a receiving error occurred

Table 15. Control Register 1 (Function of Bit 7 and Bit 6 in TX Mode)

IR1 IR0 Function (TX Mode)

Pin IRQ is set to 1 if 4 bytes still are in the TX/RX data buffer or the TX data buffer

is empty

Pin IRQ is set to 1 if 8 bytes still are in the TX/RX data buffer or the TX data buffer

is empty

Pin IRQ is set to 1 if 12 bytes still are in the TX/RX data buffer or the TX data buffer

is empty (default)

1 1 Pin IRQ is set to 1 if the TX data buffer is empty

Table 16. Control Register 1 (Function of Bit 5)

AVCC_EN Function

0 (default)

1 Enables AVCC, if the ATA5811/

ATA5812 is in AUX mode

Table 17. Control Register 1 (Function of Bit 4)

FS Function

0 433/868 MHz

1315 MHz