C8051T630 Datasheet, PDF (113/221 Pages) Silicon Laboratories – Mixed-Signal Byte-Programmable EPROM MCU

C8051T630/1/2/3/4/5
20.2.3. Assigning Port I/O Pins to External Digital Event Capture Functions
External digital event capture 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 digital event capture 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 digital event capture functions cannot be used on pins configured for analog I/O. Table 20.3
shows all available external digital event capture functions.
Table 20.3. Port I/O Assignment for External Digital Event Capture Functions
Digital 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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