UPD703111A Datasheet, PDF (870/974 Pages) NEC – 32-Bit Single-Chip Microcontroller

CHAPTER 14 PORT FUNCTIONS
14.6.2 A/D converter input pin
The following timing controller used to secure the noise elimination time is provided for the ADTRG pin. An input
signal that changes within the noise elimination time is not internally acknowledged.
Table 14-2. Noise Elimination Time of A/D Converter Input Pin
Pin
PCM5/ADTRG/SELFREF
Noise Elimination Time
Analog delay (80 ns typ.)
Caution The noise eliminator is valid only in the control mode.
14.6.3 Timer C and timer ENC1 input pins
The following noise filter that operates via clock sampling is provided for the pins of timers C and ENC1 that
operate when the valid edge is input. Input signals that change within the noise elimination time are not internally
acknowledged.
Table 14-3. Noise Elimination Time of Timer C and Timer ENC1 Input Pins
Pin
INTPC00/TIC0
INTPC01
INTPC10/TIC1
INTPC11
INTPC20/TIC2
INTPC21
INTPC30/TIC3
INTPC31
INTP100/TCUD10
INTP101/TCLR10
TIUD10
INTP110/TCUD11
INTP111/TCLR11
TIUD11
Noise Elimination Time
Selected from 0, 2, 3, or 5 clocks
Cautions 1. The noise filter of the above pins cannot acknowledge an input signal when the CPU clock
is stopped because it uses clock sampling.
2. The noise eliminator is valid only in the control mode.
870
User’s Manual U16031EJ4V1UD