AT86RF230_09 ATMEL [ATMEL Corporation], AT86RF230_09 Datasheet - Page 74

• Manufacturer Part Number: AT86RF230_09
• Description: Low Power 2.4 GHz Transceiver for ZigBee, IEEE 802.15.4, 6LoWPAN, RF4CE and ISM
• Manufacturer: ATMEL [ATMEL Corporation]

• Bit 7 – PLL_DCU_START
PLL_DCU_START = 1 initiates the delay cell calibration. The calibration cycle has
finished after maximum of 6 µs. The register bit is cleared immediately after the register
write operation.
• Bit [6:0] – Reserved
9.8 Automatic Filter Tuning (FTN)
The filter-tuning unit is a separate block within the AT86RF230. The filter-tuning result is
used to provide a correct SSBF transfer function and PLL loop-filter time constant
independent of temperature effects and part-to-part variations.
A calibration cycle is initiated automatically when entering the TRX_OFF state from the
SLEEP, RESET or P_ON states.
AT86RF230
74
5131E-MCU Wireless-02/09