Datasheet

23.4 Signal Description
Signal Name Type Description
EXTINT[15..0] Digital Input External interrupt pin
NMI Digital Input Non-maskable interrupt pin
One signal may be available on several pins.
23.5 Product Dependencies
In order to use this peripheral, other parts of the system must be configured correctly, as described below.
23.5.1 I/O Lines
Using the EIC’s I/O lines requires the I/O pins to be configured.
Related Links
32. PORT - I/O Pin Controller
23.5.2 Power Management
All interrupts are available down to STANDBY Sleep mode, but the EIC can be configured to
automatically mask some interrupts in order to prevent device wake-up.
The EIC will continue to operate in any Sleep mode where the selected source clock is running. The
EIC’s interrupts can be used to wake up the device from Sleep modes. Events connected to the Event
System can trigger other operations in the system without exiting Sleep modes.
Related Links
18. PM – Power Manager
23.5.3 Clocks
The EIC bus clock (CLK_EIC_APB) can be enabled and disabled by the Main Clock Controller, the
default state of CLK_EIC_APB can be found in the Peripheral Clock Masking section.
Some optional functions need a peripheral clock, which can either be a generic clock (GCLK_EIC, for
wider frequency selection) or a Ultra Low-Power 32 KHz clock (CLK_ULP32K, for highest power
efficiency). One of the clock sources must be configured and enabled before using the peripheral:
GCLK_EIC is configured and enabled in the Generic Clock Controller.
CLK_ULP32K is provided by the internal Ultra Low-Power (OSCULP32K) Oscillator in the OSC32KCTRL
module.
Both GCLK_EIC and CLK_ULP32K are asynchronous to the user interface clock (CLK_EIC_APB). Due
to this asynchronicity, writes to certain registers will require synchronization between the clock domains.
Refer to Synchronization for further details.
Related Links
15. MCLK – Main Clock
15.6.2.6 Peripheral Clock Masking
14. GCLK - Generic Clock Controller
29. OSC32KCTRL – 32KHz Oscillators Controller
SAM D5x/E5x Family Data Sheet
EIC – External Interrupt Controller
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 452