9. Timers
Rev.3.00 Jul. 19, 2007 page 215 of 532
REJ09B0397-0300
9.2.4
Timer A Operation States
Table 9.4 summarizes the timer A operation states.
Table 9.4
Timer A Operation States
Operation Mode
Reset
Active
Sleep
Watch
Sub-
active
Sub-
sleep
Standby
TCA Interval
Reset Functions Functions Halted Halted Halted Halted
Clock time base Reset Functions Functions Functions Functions Functions Halted
TMA
Reset Functions Retained Retained Functions Retained Retained
Note: When real-time clock time base function is selected as the internal clock of TCA in active
mode or sleep mode, the internal clock is not synchronous with the system clock, so it is
synchronized by a synchronizing circuit. This may result in a maximum error of 1/
φ
(s) in the
count cycle.
9.3 Timer
B
9.3.1 Overview
Timer B is an 8-bit timer that increments each time a clock pulse is input. This timer has two
operation modes, interval and auto reload.
Features
Features of timer B are given below.
•
Choice of seven internal clock sources (
φ
/8192,
φ
/2048,
φ
/512,
φ
/256,
φ
/64,
φ
/16,
φ
/4) or an
external clock (can be used to count external events).
•
An interrupt is requested when the counter overflows.
Block Diagram
Figure 9.2 shows a block diagram of timer B.
Содержание F-ZTAT H8 Series
Страница 6: ...Rev 3 00 Jul 19 2007 page iv of xxiv REJ09B0397 0300...
Страница 194: ...7 RAM Rev 3 00 Jul 19 2007 page 168 of 532 REJ09B0397 0300...
Страница 234: ...8 I O Ports Rev 3 00 Jul 19 2007 page 208 of 532 REJ09B0397 0300...
Страница 274: ...9 Timers Rev 3 00 Jul 19 2007 page 248 of 532 REJ09B0397 0300...
Страница 352: ...12 A D Converter Rev 3 00 Jul 19 2007 page 326 of 532 REJ09B0397 0300...
Страница 466: ...16 Electrical Characteristics H8 3854 Group Rev 3 00 Jul 19 2007 page 440 of 532 REJ09B0397 0300...
Страница 561: ......