User Manual
143
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
System Control Unit - Digital Modules (SCU-DM)
7.6.3.2
External Interrupt Control Registers
The external interrupts are driven into the TLE984xQX from the ports. External interrupts can be positive,
negative or double edge triggered. Register EXICON0 specifies the active edge for the external interrupt.
If the external interrupt is positive (negative) edge triggered, the external source must hold the request pin low
(high) for at least one CCLK cycle, and then hold it high (low) for at least one CCLK cycle to ensure that the
transition is recognized.
External interrupt 2 share the interrupt node with other interrupt sources. Therefore in addition to the
corresponding interrupt node enable, external interrupt 2 may be disabled individually, and is disabled by
default after reset.
Note:
Several external interrupts support alternative input pin, selected via MODPISEL register in the SCU.
When switching inputs, the active edge/level trigger select and the level on the associated pins
should be considered to prevent unintentional interrupt generation.
External Interrupt Control Register 0
SCU_EXICON0
Offset
Reset Value
External Interrupt Control Register 0
028
H
Field
Bits
Type
Description
RES
31:6
r
Reserved
Returns 0 if read; should be written with 0.
EXINT2
5:4
rw
External Interrupt 2 Trigger Select
00
B
Interrupt disabled
01
B
Interrupt on rising edge
10
B
Interrupt on falling edge
11
B
Interrupt on both rising and falling edge
EXINT1
3:2
rw
External Interrupt 1 Trigger Select
00
B
Interrupt disabled
01
B
Interrupt on rising edge
10
B
Interrupt on falling edge
11
B
Interrupt on both rising and falling edge
31
16
r
RES
15
6
r
RES
5
4
rw
EXINT2
3
2
rw
EXINT1
1
0
rw
EXINT0