Renesas RH850/F1K Series User Manual

RH850/F1K Series Hardware Design Guide
R01AN2911EJ0100 Rev. 1.00 Page 21 of 46
Aug 04, 2016
4.2.4 Analog Filter Function
Depending on the alternative port functionality selected, some input signals of the device pins are passed through an
analog filter - respectively analog delay stage - to remove noise and glitches from the input signal.
The detection level of the filtered input signal depends on the high-level/low-level input voltage of the port input buffer
and its supported electrical characteristics.
After passing the external signal through an analog filter to eliminate noise and spikes, the event detection evaluates the
level or any level change, i.e. an edge, of the signal and generates an output accordingly.
Figure 11 Analog Filter Function
Note: The event detection implementation depends on the analog filter type.
The input detection level as well as the pulse rejection of the analog filters are specified in the corresponding pin
characteristics and peripheral chapters in the electrical characteristics of the RH850/F1K hardware user’s manual.
Port Input
Buffer
Analog Filter
Pn_m
Event
Detection
Note

Renesas RH850/F1K Series Specifications

General

Brand	Renesas
Model	RH850/F1K Series
Category	Power Supply
Language	English