HD64F3644PV Datasheet, PDF (231/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 Timers
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 the 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 B1
9.3.1 Overview
Timer B1 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 B1 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.
Rev. 6.00 Sep 12, 2006 page 209 of 526
REJ09B0326-0600