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R01UH0336EJ0102 Rev.1.02
Page 110 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 2 Port Functions
(1)
DNFAnCTL – Digital Noise Canceller Control Register
This register is used to select the sampling clock for the digital noise canceller.
Access
Readable and writable in 8-bit units.
Address
Refer to Table 2-53, The List of Registers for the Digital Noise Canceller.
Initial value
00
H
7
6
5
4
3
2
1
0
0
DNFAnNFSTS[1:0]
0
0
DNFAnPRS[2:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 2-54
Contents of Register DNFAnCTL
Bit Position
Bit Name
Function
6, 5
DNFAn
NFSTS[1:0]
Number of samples at the same level for judgment to
validate or invalidate an external pulse
00: Two
01: Three
10: Four
11: Five
2 to 0
DNFAn
PRS[2:0]
Digital filter sampling clock selection
000: DNFATCKI / 1
001: DNFATCKI / 2
010: DNFATCKI / 4
011: DNFATCKI / 8
100: DNFATCKI / 16
101: DNFATCKI / 32
110: DNFATCKI / 64
111: DNFATCKI / 128
DNFATCKI is the clock signal selected in the
DNFSCTL register.