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Section 9 Timers
Rev. 6.00 Sep 12, 2006 page 244 of 526
REJ09B0326-0600
external input signal can be selected simultaneously, by setting IEDGA
≠
IEDGC. If IEDGA =
IEDGC, then only one edge is selected (either the rising edge or falling edge). See table 9.16.
Note: The FRC value is transferred to the input capture register (ICR) regardless of the value of
the input capture flag (ICF).
Edge detector
and internal
capture signal
generator
ICRC
ICRA
FRC
FTIA
IEOGA BUFEA IEDGC
Figure 9.17 Buffer Operation (Example)
Table 9.16 Input Edge Selection during Buffer Operation
IEDGA
IEDGC
Input Edge Selection
0
0
Falling edge of input capture A input signal is captured
(initial value)
1
Rising and falling edge of input capture A input signal are both captured
1 0
1
Rising edge of input capture A input signal is captured
ICRA to ICRD can be written and read by the CPU. Since they are 16-bit registers, data is
transferred from them to the CPU via a temporary register (TEMP). For details see section 9.5.3,
CPU Interface.
To assure input capture, the pulse width of the input capture input signal must be at least 1.5
system clocks (
φ
) when a single edge is selected, or at least 2.5 system clocks (
φ
) when both edges
are selected.
ICRA to ICRD are initialized to H'0000 upon reset and in standby mode, watch mode, subsleep
mode, and subactive mode.
Содержание F-ZTAT H8/3642A Series
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Страница 21: ...Rev 6 00 Sep 12 2006 page xix of xx Appendix E Product Code Lineup 522 Appendix F Package Dimensions 524 ...
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Страница 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Страница 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Страница 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Страница 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Страница 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...