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LLCC68 датащи(PDF) 49 Page - Semtech Corporation |
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LLCC68 датащи(HTML) 49 Page - Semtech Corporation |
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49 / 106 page ![]() LLCC68 Data Sheet Rev. 1.0 DS.LLCC68.W.APP July 2019 49 of 106 Semtech www.semtech.com 8.3.2 Digital Input/Output Any of the 3 DIOs can be selected as an output interrupt source for the application. When the application receives an interrupt, it can determine the source by using the command GetIrqStatus(...). The interrupt can then be cleared using the ClearIrqStatus(...) command. The Pin Description is as follows: DIO1 is the generic IRQ line, any interrupt can be mapped to DIO1. The complete list of available IRQ can be found in Section 8.4 "Digital Interface Status versus Chip modes" on page 49. DIO2 has a double functionality. As DIO1, DIO2 can be used as a generic IRQ line and any IRQ can be routed through this pin. Also, DIO2 can be configured to drive an RF switch through the use of the command SetDio2AsRfSwitchCtrl(...). In this mode, DIO2 will be at a logical 1 during Tx and at a logical 0 in any other mode. DIO3 also has a double functionality and as DIO1 or DIO2, it can be used as a generic IRQ line. Also, DIO3 can be used to automatically control a TCXO through the command SetDio3AsTCXOCtrl(...). In this case, the device will automatically power cycle the TCXO when needed. 8.4 Digital Interface Status versus Chip modes Note: • PU = pull up with 50 k at typical conditions • PD = pull down with 50 k at typical conditions (the resistor value varies with the supply voltage) Table 8-3: Digital Pads Configuration for each Chip Mode Mode DIO3 DIO2 DIO1 BUSY MISO MOSI SCK NSS NRESET Reset PD PD PD PU HIZ HIZ HIZ IN - Start-up HIZ PD HIZ PD HIZ PD HIZ PU HIZ HIZ HIZ IN IN PU Sleep HIZ PD HIZ PD HIZ PD HIZ PU HIZ HIZ HIZ IN IN PU STBY_RC OUT OUT OUT OUT OUT IN IN IN IN PU STBY_XOSC OUT OUT OUT OUT OUT IN IN IN IN PU FS OUT OUT OUT OUT OUT IN IN IN IN PU RX OUT OUT OUT OUT OUT IN IN IN IN PU TX OUT OUT OUT OUT OUT IN IN IN IN PU |
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