LLCC68 datasheet(63/106 Pages) SEMTECH

63 / 106 page

LLCC68

Data Sheet

Rev. 1.0

DS.LLCC68.W.APP

July 2019

63 of 106

Semtech

www.semtech.com

13.1.2 SetStandby

The command SetStandby(...) is used to set the device in a configuration mode which is at an intermediate level of

consumption. In this mode, the chip is placed in halt mode waiting for instructions via SPI. This mode is dedicated to chip

configuration using high level commands such as SetPacketType(...).

By default, after battery insertion or reset operation (pin NRESET goes low), the chip will enter in STDBY_RC mode running

with a 13 MHz RC clock.

The StdbyConfig byte definition is as follows:

13.1.3 SetFs

The command SetFs() is used to set the device in the frequency synthesis mode where the PLL is locked to the carrier

frequency. This mode is used for test purposes of the PLL and can be considered as an intermediate mode. It is

automatically reached when going from STDBY_RC mode to TX mode or RX mode.

In FS mode, the PLL will be set to the frequency programmed by the function SetRfFrequency(...) which is the same used for

TX or RX operations.

13.1.4 SetTx

The command SetTx() sets the device in transmit mode.

Table 13-3: SetConfig SPI Transaction

Byte

Data from host

Opcode = 0x80

StdbyConfig

Table 13-4: STDBY Mode Configuration

StdbyConfig

Value

Description

STDBY_RC

Device running on RC13M, set STDBY_RC mode

STDBY_XOSC

Device running on XTAL 32MHz, set STDBY_XOSC mode

Table 13-5: SetFs SPI Transaction

Byte

Data from host

Opcode = 0xC1

Table 13-6: SetTx SPI Transaction

Byte

1-3

Data from host

Opcode = 0x83

timeout(23:0)

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