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R01UH0336EJ0102 Rev.1.02
Page 109 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 2 Port Functions
2.14.2
Control Registers
The following registers control and run the digital noise filter.
n = 0 to 36
Caution 1.
Do not change the settings of associated control registers (the DNFAnCTL,
DNFAnEN, DNFSCTL registers) while DNFAnEN.DNFAnNFENm = 1, which
enables the digital filter. Changing the settings can lead to the filter generating
unanticipated output.
Caution 2. Many registers include bits to which no function has been allocated. Unless
there is a specific indication to the contrary, do not write values other than the
initial values to such bits. Operation is not guaranteed if other values are set in
these bits.
Table 2-53
The List of Registers for the Digital Noise Canceller
Register Function
Name
Address
Digital noise canceller control register
DNFAnCTL
<DNFn_base> + n × 100
H
Digital noise canceller enable register
DNFAnEN
<DNFn_base> + n × 100
H
+ 4
Digital noise canceller enable register L
DNFAnENL
<DNFn_base> + n × 100
H
+ C
H
Digital noise filter sampling clock control
register
DNFSCTL
FF420034
H