LLCC68 datasheet(74/111 Pages) SEMTECH

74 / 111 page

LLCC68

Data Sheet

Rev. 1.1

DS.LLCC68.W.APP

Dec 2024

74 of 111

Semtech

LLCC68

www.semtech.com

13.1.11 SetRegulatorMode

By default only the LDO is used. This is useful in low cost applications where the cost of the extra components needed for a DC-DC converter

is prohibitive. Using only a linear regulator implies that the RX or TX current is almost doubled. This function specifies if DC-DC or LDO is used

for power regulation. The regulation mode is defined by parameter regModeParam.

Note: This function is clearly related to the hardware implementation of the device. The user should always use this command while

knowing what has been implemented at the hardware level.

13.1.12 Calibrate Function

At power up the radio performs calibration of RC64k, RC13M, PLL and ADC. It is however possible to launch a calibration of one or several

blocks at any time starting in STDBY_RC mode. The calibrate function starts the calibration of a block defined by calibParam.

The total calibration time if all blocks are calibrated is 3.5ms. The calibration must be launched in STDBY_RC mode and the BUSY pins are

high during the calibration process. A falling edge of BUSY indicates the end of the procedure.

Table 13-16: SetRegulatorMode SPI Transaction

Byte

Data from host

Opcode = 0x96

regModeParam

0: Only LDO used for all modes

1: DC_DC+LDO used for STBY_XOSC,FS, RX and TX modes

Table 13-17: Calibrate SPI Transaction

Byte

Data from host

Opcode = 0x89

calibParam

Table 13-18: Calibration Setting

CalibParam

Calibration Setting

Bit 0

0: RC64k calibration disabled

1: RC64k calibration enabled

Bit 1

0: RC13M calibration disabled

1: RC13M calibration enabled

Bit 2

0: PLL calibration disabled

1: PLL calibration enabled

Bit 3

0: ADC pulse calibration disabled

1: ADC pulse calibration enabled

Bit 4

0: ADC bulk N calibration disabled

1: ADC bulk N calibration enabled

Bit 5

0: ADC bulk P calibration disabled

1: ADC bulk P calibration enabled

Bit 6

0: Image calibration disabled

1: Image calibration enabled

Bit 7

0: RFU

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