E202075_HD404889 Datasheet, PDF (83/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Timers
The MCU incorporates four timers, A to D, in the HD404889, HD404899, and HD404878 Series, or three
timers, A to C, in the HD404868 Series.
• Timer A: Free-running timer
• Timer B: Multifunctional timer
• Timer C: Multifunctional timer
• Timer D: Multifunctional timer
Timer A is an 8-bit free-running timer. Timers B, C, and D are 8-bit multifunctional timers; Each one of
their have the functions shown in table 25 and their operating mode can be set by the program.
Table 25 Timer Functions
Functios
Clock source Prescaler S
Prescaler W
External event
Timer functions Free-running
Time-base
Event counter
Reload
Watchdog
Input Capture
Timer outputs Toggle
PWM
Note: — implies not available
Timer A
Available
Available
—
Available
Available
—
—
—
—
—
—
Timer B
Available
—
Available
Available
—
Available
Available
—
—
Available
Available
Timer C
Available
—
—
Available
—
—
Available
Available
—
Available
Available
Timer D
Available
—
Available
Available
—
Available
Available
—
Available
—
—
Timer A
Timer A Functions
Timer A has the following functions.
• Free-running timer
• Realtime clock time base
The block diagram of timer A is shown in figure 35.
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