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HD64F3644PV Datasheet, PDF (226/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents | |||
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Section 9 Timers
9.2 Timer A
9.2.1 Overview
Timer A is an 8-bit timer with interval timing and real-time clock time-base functions. The clock
time-base function is available when a 32.768-kHz crystal resonator is connected. A clock signal
divided from 32.768 kHz or from the system clock can be output at the TMOW pin.
Features
Features of timer A are given below.
⢠Choice of eight internal clock sources (Ï/8192, Ï/4096, Ï/2048, Ï/512, Ï/256, Ï/128, Ï/32,
Ï/8).
⢠Choice of four overflow periods (1 s, 0.5 s, 0.25 s, 31.25 ms) when timer A is used as a clock
time base (using a 32.768 kHz crystal resonator).
⢠An interrupt is requested when the counter overflows.
⢠Any of eight clock signals can be output from pin TMOW: 32.768 kHz divided by 32, 16, 8, or
4 (1 kHz, 2 kHz, 4 kHz, 8 kHz), or the system clock divided by 32, 16, 8, or 4.
Rev. 6.00 Sep 12, 2006 page 204 of 526
REJ09B0326-0600
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