LLCC68 datasheet(72/106 Pages) SEMTECH

72 / 106 page

LLCC68

Data Sheet

Rev. 1.0

DS.LLCC68.W.APP

July 2019

72 of 106

Semtech

www.semtech.com

Note:

These changes make the use of nominal power either sub-optimal or unachievable.

Caution!

The following restrictions must be observed to avoid voltage overstress on the PA, exceeding the maximum ratings

may cause irreversible damage to the device: paDutyCycle should not be higher than 0x04.

13.1.15 SetRxTxFallbackMode

The command SetRxTxFallbackMode defines into which mode the chip goes after a successful transmission or after a packet

reception.

The fallbackMode byte definition is given as follows:

By default, the radio will always return in STDBY_RC unless the configuration is changed by using this command. Changing

the default mode from STDBY_RC to STDBY_XOSC or FS will only have an impact on the switching time of the radio.

13.2 Registers and Buffer Access

13.2.1 WriteRegister Function

The command WriteRegister(...) allows writing a block of bytes in a data memory space starting at a specific address. The

address is auto incremented after each data byte so that data is stored in contiguous memory locations. The SPI data

transfer is described in the following table.

Table 13-22: SetRxTxFallbackMode SPI Transaction

Byte

Data from host

Opcode = 0x93

fallbackMode

Table 13-23: Fallback Mode Definition

Fallback Mode

Value

Description

0x40

The radio goes into FS mode after Tx or Rx

STDBY_XOSC

0x30

The radio goes into STDBY_XOSC mode after Tx or Rx

STDBY_RC

0x20

The radio goes into STDBY_RC mode after Tx or Rx

Table 13-24: WriteRegister SPI Transaction

Byte

...

Data from

host

Opcode =

0x0D

address[15:8]

address[7:0]

data@address

data@address+1

...

data@address+ (n-3)

Data to host

RFU

Status

...

status

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