28.8.12 Event Input Control

Tip: The I/O pins are assembled in pin groups (”PORT groups”) with up to 32 pins. Group 0 consists of the PA pins, group 1 is for the PB pins, etc. Each pin group has its own PORT registers, with a 0x80 address spacing. For example, the register address offset for the Data Direction (DIR) register for group 0 (PA00 to PA31) is 0x00, and the register address offset for the DIR register for group 1 (PB00 to PB31) is 0x80.

There are up to four input event pins for each PORT group. Each byte of this register addresses one Event input pin.

Name: EVCTRL
Offset: 0x2C
Reset: 0x00000000
Property: PAC Write-Protection

Bit 3130292827262524 
 PORTEI3EVACT3[1:0]PID3[4:0] 
Access RWRWRWRWRWRWRWRW 
Reset 00000000 
Bit 2322212019181716 
 PORTEI2EVACT2[1:0]PID2[4:0] 
Access RWRWRWRWRWRWRWRW 
Reset 00000000 
Bit 15141312111098 
 PORTEI1EVACT1[1:0]PID1[4:0] 
Access RWRWRWRWRWRWRWRW 
Reset 00000000 
Bit 76543210 
 PORTEI0EVACT0[1:0]PID0[4:0] 
Access RWRWRWRWRWRWRWRW 
Reset 00000000 

Bits 7, 15, 23, 31 – PORTEIx PORT Event Input Enable x [x = 3..0]

ValueDescription
0 The event action x (EVACTx) will not be triggered on any incoming event.
1 The event action x (EVACTx) will be triggered on any incoming event.

Bits 5:6, 13:14, 21:22, 29:30 – EVACTx PORT Event Action x [x = 3..0]

These bits define the event action the PORT will perform on event input x. See also Table 28-4.

Bits 0:4, 8:12, 16:20, 24:28 – PIDx PORT Event Pin Identifier x [x = 3..0]

These bits define the I/O pin on which the event action will be performed, according to Table 28-5.

Table 28-4. PORT Event x Action ( x = [3..0] )
Value Name Description
0x0 OUT Output register of pin will be set to level of event.
0x1 SET Set output register of pin on event.
0x2 CLR Clear output register of pin on event.
0x3 TGL Toggle output register of pin on event.
Table 28-5. PORT Event x Pin Identifier ( x = [3..0] )
Value Name Description
0x0 PIN0 Event action to be executed on PIN 0.
0x1 PIN1 Event action to be executed on PIN 1.
... ... ...
0x31 PIN31 Event action to be executed on PIN 31.