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R8C2K датащи(PDF) 203 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]
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R8C2K датащи(HTML) 203 Page - Renesas Technology Corp

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R8C/2K Group, R8C/2L Group
16. Timers
Rev.1.10
Dec 21, 2007
Page 186 of 450
REJ09B0406-0110
16.3.3
Common Items for Multiple Modes
16.3.3.1
Count Source
The method of selecting the count source is common to all modes.
Table 16.14 lists the Count Source Selection, and Figure 16.39 shows a Count Source Block Diagram.
Figure 16.39
Count Source Block Diagram
The pulse width of the external clock input to the TRCCLK pin should be three cycles or more of the timer RC
operation clock (see Table 16.11 Timer RC Operation Clock).
To select fOCO40M as the count source, set the FRA00 bit in the FRA0 register set to 1 (high-speed on-chip
oscillator on), and then set bits TCK2 to TCK0 in the TRCCR1 register to 110b (fOCO40M).
Table 16.14
Count Source Selection
Count Source
Selection Method
f1, f2, f4, f8, f32
Count source selected using bits TCK2 to TCK0 in TRCCR1 register
fOCO40M
FRA00 bit in FRA0 register set to 1 (high-speed on-chip oscillator on) and bits
TCK2 to TCK0 in TRCCR1 register are set to 110b (fOCO40M)
External signal input
to TRCCLK pin
Bits TCK2 to TCK0 in TRCCR1 register are set to 101b (count source is rising edge
of external clock) and PD5_0 bit in PD5 register is set to 0 (input mode)
TCK2 to TCK0
TRC register
TCK2 to TCK0: Bits in TRCCR1 register
f1
f2
f4
f8
f32
= 001b
= 010b
= 011b
= 000b
= 110b
= 100b
Count source
TRCCLK
= 101b
fOCO40M



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