LLCC68 datasheet(74/106 Pages) SEMTECH

74 / 106 page

LLCC68

Data Sheet

Rev. 1.0

DS.LLCC68.W.APP

July 2019

74 of 106

Semtech

www.semtech.com

13.3 DIO and IRQ Control Functions

13.3.1 SetDioIrqParams

This command is used to set the IRQ flag.

13.3.2 IrqMask

The IrqMask masks or unmasks the IRQ which can be triggered by the device. By default, all IRQ are masked (all ‘0’) and the

user can enable them one by one (or several at a time) by setting the corresponding mask to ‘1’.

13.3.2.1 DioxMask

The interrupt causes a DIO to be set if the corresponding bit in DioxMask and the IrqMask are set. As an example, if bit 0 of

IrqMask is set to 1 and bit 0 of DIO1Mask is set to 1 then, a rising edge of IRQ source TxDone will be logged in the IRQ register

and will appear at the same time on DIO1.

One IRQ can be mapped to all DIOs, one DIO can be mapped to all IRQs (an OR operation is done) but some IRQ sources will

be available only on certain modes of operation and frames.

In total there are 10 possible interrupt sources depending on the chosen frame and chip mode. Each one of them can be

enabled or masked. In addition, every one of them can be mapped to DIO1, DIO2 or DIO3. Note that if DIO2 or DIO3 are used

to control the RF Switch or the TCXO, the IRQ will not be generated even if it is mapped to the pins.

Table 13-28: SetDioIrqParams SPI Transaction

Byte

1-2

3-4

5-6

7-8

Data from host

SetDioIrqParams

(0x08)

Irq Mask(15:0)

DIO1Mask(15:0)

DIO2Mask(15:0)

DIO3Mask(15:0)

Table 13-29: IRQ Registers

Bit

IRQ

Description

Modulation

TxDone

Packet transmission completed

All

RxDone

Packet received

All

PreambleDetected

Preamble detected

All

SyncWordValid

Valid sync word detected

FSK

HeaderValid

Valid LoRa header received

LoRa®

HeaderErr

LoRa header CRC error

LoRa®

CrcErr

Wrong CRC received

All

CadDone

Channel activity detection finished

LoRa®

LLCC68 Datasheet(PDF) 74 Page - Semtech Corporation

LLCC68 Datasheet(HTML) 74 Page - Semtech Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL