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Section 18 Multi-Function Timer Pulse Unit (MTU)
Rev. 4.00 Sep. 14, 2005 Page 524 of 982
REJ09B0023-0400
18.3.1
Timer Control Register (TCR)
The TCR registers are 8-bit readable/writable registers that control the TCNT operation for each
channel. The MTU has a total of five TCR registers, one for each channel (channel 0 to 4). TCR
register settings should be conducted only when TCNT operation is stopped.
Bit Bit
Name
Initial
value R/W
Description
7
6
5
CCLR2
CCLR1
CCLR0
0
0
0
R/W
R/W
R/W
Counter Clear 2 to 0
These bits select the TCNT counter clearing source.
See tables 18.3 and 18.4 for details.
4
3
CKEG1
CKEG0
0
0
R/W
R/W
Clock Edge 1 and 0
These bits select the input clock edge. When the input
clock is counted using both edges, the input clock
period is halved (e.g. P
φ
/4 both edges =
φ
/2 rising
edge). If phase counting mode is used on channels 1
and 2, this setting is ignored and the phase counting
mode setting has priority. Internal clock edge selection
is valid when the input clock is
φ
/4 or slower. When
φ
/1,
or the overflow/underflow of another channel is selected
for the input clock, although values can be written,
counter operation compiles with the initial value.
00: Count at rising edge
01: Count at falling edge
1X: Count at both edges
[Legend]
X: Don't care
2
1
0
TPSC2
TPSC1
TPSC0
0
0
0
R/W
R/W
R/W
Time Prescaler 2 to 0
These bits select the TCNT counter clock. The clock
source can be selected independently for each channel.
See tables 18.5 to 18.8 for details.
Содержание HD6417641
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Страница 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Страница 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Страница 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
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Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
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Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
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