C8051F336_08 Datasheet, PDF (123/227 Pages) Silicon Laboratories – Mixed-Signal Byte-Programmable EPROM MCU

C8051F336/7/8/9
20.2.3. Assigning Port I/O Pins to External Event Trigger Functions
External event trigger functions can be used to trigger an interrupt or wake the device from a low power
mode when a transition occurs on a digital I/O pin. The event trigger functions do not require dedicated
pins and will function on both GPIO pins (PnSKIP = ’1’) and pins in use by the Crossbar (PnSKIP = ‘0’).
External event trigger functions cannot be used on pins configured for analog I/O. Table 20.3 shows all
available external event trigger functions.
Table 20.3. Port I/O Assignment for External Event Trigger Functions
Event Trigger Function
External Interrupt 0
External Interrupt 1
Port Match
Potentially Assignable Port Pins
P0.0 - P0.7
P0.0 - P0.7
P0.0 - P1.7
SFR(s) used for
Assignment
IT01CF
IT01CF
P0MASK, P0MAT
P1MASK, P1MAT
Rev.1.0
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