C868_02 Datasheet, PDF (197/244 Pages) Infineon Technologies AG – 8 - Bit CMOS Microcontroller

Field
EXINT3
-
C868
Interrupt System
Bits Typ Description
1
rwh Interrupt Request Flag for External Interrupt 3
0 : Interrupt request is not active, cleared by
software. (default)
1 : Interrupt request is active, set by hardware.
[7:2] r
reserved;
returns ’0’ if read; should be written with ’0’;
The external interrupt 2 and 3(CCPOS2/INT2/AN2, P1.3/INT3) can be either positive or
negative transition-activated, depending on the bits register EXICON. The flags that
actually generates this interrupt are bits EXINT2 and EXINT3 in register IRCON0. When
processing the external interrupts, flags must be cleared by software.
EXICON
External Interrupt Control Register
7
6
5
4
-
-
-
-
r
r
r
r
[Reset value: XXXXXX00_B]
3
2
1
0
-
-
ESEL3 ESEL2
r
r
rw
rw
Field
ESEL2
ESEL3
-
Bits Typ Description
[7:0] rw External Interrupt 2 Edge Trigger Select.
0 : Interrupt on falling edge. (default)
1 : Interrupt on rising edge.
[7:0] rw External Interrupt 3 Edge Trigger Select.
0 : Interrupt on falling edge. (default)
1 : Interrupt on rising edge.
[7:2] r
reserved;
returns ’0’ if read; should be written with ’0’;
All external interrupts (CCPOS2/INT2/AN2, P1.3/INT3) can be either positive or negative
transition-activated, depending on the bits register EXICON. The flags that actually
generates this interrupt are bits EXINT2 and EXINT3 in register IRCON0. The flags must
be cleared by software.
User’s Manual
7-13
V 0.4, 2002-01