SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 117
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SAF-C164SM
Manufacturer Part Number
SAF-C164SM
Description
16-Bit CMOS Microcontroller
Manufacturer
Infineon Technologies
Datasheet
1.SAF-C164SM.pdf
(470 pages)
- Current page: 117 of 470
- Download datasheet (6Mb)
Fast External Interrupts
Input pins which may be used for external interrupts are sampled every 16 TCL; that is,
external events are scanned and detected in time frames of 16 TCL. The C164CM
provides 4 interrupt inputs that are sampled every 2 TCL, so external events are
captured faster than with standard interrupt inputs.
The lower 4 pins of Port P1H (P1H.3-P1H.0) can be programmed individually to this fast
interrupt mode, where the trigger transition (rising, falling or both) also can be selected.
The External Interrupt Control register EXICON controls this feature for all 4 pins.
EXICON
External Intr. Ctrl. Reg.
Bit
EXIxES
Note: The fast external interrupt inputs are sampled every 2 TCL. The interrupt request
The interrupt control registers listed below (CC11IC … CC8IC) control the fast external
interrupts of the C164CM. These fast external interrupt nodes and vectors are named
according to the C167’s CAPCOM channels CC11 … CC8, so interrupt nodes receive
identical names throughout the architecture. See register description below.
User’s Manual
15
-
-
arbitration and processing, however, is executed every 8 TCL.
14
13
Function
External Interrupt x Edge Selection Field (x = 7 … 0)
0 0: Fast external interrupts disabled: standard mode
0 1: Interrupt on positive edge (rising)
1 0: Interrupt on negative edge (falling)
1 1: Interrupt on any edge (rising or falling)
-
-
12
11
-
-
10
ESFR (F1C0
9
-
-
8
5-27
EXI3ES
7
H
/E0
rw
6
H
)
Interrupt and Trap Functions
EXI2ES
5
rw
4
Reset Value: 0000
C164CM/C164SM
EXI1ES
3
rw
2
Derivatives
V1.0, 2002-02
EXI0ES
1
rw
0
H
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