SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 279

• Manufacturer Part Number: SAF-C164SM
• Description: 16-Bit CMOS Microcontroller
• Manufacturer: Infineon Technologies

To use the respective port pin as external capture input pin CCxIO for capture register
CCx, this port pin must be configured as input; that is, the corresponding direction control
bit must be set to ‘0’. To ensure that a signal transition is properly recognized, an external
capture input signal should be held for at least eight CPU clock cycles before changing
its level.
During these eight CPU clock cycles, the capture input signals are scanned sequentially.
When a timer is modified or incremented in this process, the new timer contents will
already be captured for the remaining capture registers within the current scanning
sequence.
Note: When the timer modification can generate an overflow the capture interrupt
If pin CCxIO is configured as output, the capture function may be triggered by modifying
the corresponding port output latch via software, for testing purposes, for example.
User’s Manual
routine should check if the timer overflow was serviced during these 8 CPU clock
cycles.
16-13
Capture/Compare Unit CAPCOM2
C164CM/C164SM
Derivatives
V1.0, 2002-02