Datasheet

2.14 Interrupt handling
Apart from handling interrupts from interrupt sources within the processor, the generic interrupt controller (GIC) of the LS1046A
processor can handle interrupts from external interrupt sources. In the FRWY-LS1046A, the onboard interrupt sources are
connected to interrupt controller through IRQ01, IRQ03-IRQ07 pins of the processor for interrupt controller to handle their interrupt
signals. The figure below shows the mapping between the onboard interrupt sources and IRQ pins of the processor.
LS1046A
4.7 K
OVDD
OVDD
IRQ05
IRQ07
IRQ01
IRQ03
IRQ04
IRQ06
QSGPHY1_INT_B
THERM_WARN_B
THERM_FAULT_B
IRQ_RTC_B
PMIC_INT_B
uBUS1_INT
4.7 K
3V3
4.7 K
3V3
4.7 K
3V3
100 K
3V3
10 K
3V3
QSGMII PHY
Temperature sensor
System RTC
PF8100 PMIC
MikroBUS connector (J57)
Figure 23. Interrupt assignments
The table below further explains the FRWY-LS1046A interrupt assignments.
Table 24. Interrupt assignments
Interrupt controller signal Interrupt signal on board Description
IRQ01 QSGPHY1_INT_B QSGMII PHY interrupt
IRQ03 THERM_WARN_B Temperature sensor warning interrupt
IRQ04 THERM_FAULT_B Temperature sensor fault interrupt
IRQ05 IRQ_RTC_B RTC interrupt
IRQ06 PMIC_INT_B PF8100 PMIC interrupt
IRQ07 uBUS1_INT MikroBUS click board interrupt
2.15 Temperature measurement
The FRWY-LS1046A has a digital temperature sensor (thermal monitor), which can be used to measure the LS1046A die
temperature through the thermal diode of the processor. The LS1046A processor sends temperature readings (through
Interrupt handling
Layerscape FRWY-LS1046A Board Reference Manual, Rev. 0, 26 April 2019
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