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R8C2K датащи(PDF) 257 Page - Renesas Technology Corp

номер детали R8C2K
подробное описание детали  RENESAS MCU R8C FAMILY / R8C/2x SERIES
PDF  471 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R8C2K датащи(HTML) 257 Page - Renesas Technology Corp

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R8C/2K Group, R8C/2L Group
16. Timers
Rev.1.10
Dec 21, 2007
Page 240 of 450
REJ09B0406-0110
16.4.5.1
Digital Filter
The TRDIOji input is sampled, and when the sampled input level matches 3 times, its level is determined.
Select the digital filter function and sampling clock by the TRDDFi register.
Figure 16.82 shows a Block Diagram of Digital Filter.
Figure 16.82
Block Diagram of Digital Filter
Clock period selected by
bits TCK2 to TCK0 or
bits DFCK1 to DFCK0
Sampling clock
TRDIOji input signal
Input signal through
digital filtering
Transmission cannot be
performed without 3-time match
because the input signal is
assumed to be noise.
Signal transmission delayed
up to 5-sampling clock
Recognition of the
signal change with
3-time match
i = 0 or 1, j = either A, B, C, or D
TCK0 to TCK2: Bits in TRDCRi register
DFCK0 to DFCK1 and DFj: Bits in TRDDF register
IOA0 to IOA2 and IOB0 to IOB2: Bits in TRDIORAi register
IOC0 to IOC3 and IOD0 to IOD3: Bits in TRDIORCi register
C
DQ
Latch
C
DQ
Latch
C
DQ
Latch
Match
detection
circuit
Edge detection
circuit
DFj
Sampling clock
IOA2 to IOA0
IOB2 to IOB0
IOC3 to IOC0
IOD3 to IOD0
DFCK1 to DFCK0
TRDIOji input signal
f32
f8
f1
C
DQ
Latch
C
DQ
Latch
Timer RD operation clock
f1, fOCO40M)
Count source
= 101b
= 100b
= 011b
= 110b
= 010b
= 001b
fOCO40M
f4
f2
f8
f32
TRDCLK
f1
= 000b
= 00b
= 01b
= 10b
= 11b
TCK2 to TCK0
1
0



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