Section 12 16-Bit Free-Running Timer (FRT)
Rev. 3.00 Jan 25, 2006 page 291 of 872
REJ09B0286-0300
12.3.4
Output Compare Registers AR and AF (OCRAR and OCRAF)
OCRAR and OCRAF are 16-bit readable/writable registers. When the OCRAMS bit in TOCR is
set to 1, the operation of OCRA is changed to include the use of OCRAR and OCRAF. The
contents of OCRAR and OCRAF are automatically added alternately to OCRA, and the result is
written to OCRA. The write operation is performed on the occurrence of compare-match A. In the
1st compare-match A after setting the OCRAMS bit to 1, OCRAF is added. The operation due to
compare-match A varies according to whether the compare-match follows addition of OCRAR or
OCRAF. The value of the OLVLA bit in TOCR is ignored, and 1 is output on a compare-match A
following addition of OCRAF, while 0 is output on a compare-match A following addition of
OCRAR.
When using the OCRA automatic addition function, do not select internal clock
φ
/2 as the FRC
input clock together with a set value of H'0001 or less for OCRAR (or OCRAF).
OCRAR and OCRAF should always be accessed in 16-bit units; cannot be accessed in 8-bit units.
OCRAR and OCRAF are initialized to H'FFFF.
12.3.5
Output Compare Register DM (OCRDM)
OCRDM is a 16-bit readable/writable register in which the upper 8 bits are fixed at H'00. When
the ICRDMS bit in TOCR is set to 1 and the contents of OCRDM are other than H'0000, the
operation of ICRD is changed to include the use of OCRDM. The point at which input capture D
occurs is taken as the start of a mask interval. Next, twice the contents of OCRDM is added to the
contents of ICRD, and the result is compared with the FRC value. The point at which the values
match is taken as the end of the mask interval. New input capture D events are disabled during the
mask interval. A mask interval is not generated when the contents of OCRDM are H'0000 while
the ICRDMS bit is set to 1.
OCRDM should always be accessed in 16-bit units; cannot be accessed in 8-bit units. OCRDM is
initialized to H'0000.
Содержание H8S/2158
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Страница 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Страница 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
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Страница 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Страница 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Страница 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Страница 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
Страница 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Страница 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Страница 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...