M-V850E-IA4 Renesas Electronics America, M-V850E-IA4 Datasheet - Page 158

• Manufacturer Part Number: M-V850E-IA4
• Description: KIT EVAL V850E IA4 UPD70F3186
• Manufacturer: Renesas Electronics America

Specifications of M-V850E-IA4

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

156
(2) Noise elimination time select register 1n (NRC1n) (V850E/IA3: n = 0, V850E/IA4: n = 0, 1)
Note V850E/IA4 only
The NRC1n register is used to select the sampling clock that is used to eliminate digital noise on the TIUD1n,
TCUD1n, or TCLR1n pin. If the same level is not detected on these pins five times in a row using the clock
selected by the NRC1n register, the signal is eliminated as noise.
This register can be read or written in 8-bit or 1-bit units.
Reset sets this register to 00H.
Cautions 1. If the input pulse lasts for the duration of 4 to 5 clocks, it is undefined whether the pulse
V850E/IA3
V850E/IA4
NRC1n
n = 0, 1
2. If noise is generated in synchronization with the sampling clock, eliminate the noise by
3. Noise is not eliminated if the pin is used as a normal input port pin.
4. The noise elimination function starts operating when the TMC1n.TM1CEn bit is set to 1
n = 0
After reset: 00H
is detected as a valid edge or eliminated as noise. So that the pulse is actually detected
as a valid edge, the same pulse level must be input for the duration of 5 clocks or more.
attaching a filter to the input pin.
(enabling count operations).
NRC1n1
0
0
1
1
7
0
NRC1n0
R/W
0
1
0
1
6
0
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16543EJ4V0UD
Address: NRC10 FFFFF598H, NRC11
f
f
f
f
XX
XX
XX
XX
/32
/16
/8
/4
5
0
4
0
Selection of sampling clock
3
0
2
0
Note
FFFFF5B8H
NRC1n1 NRC1n0
1
0