HD404639R Datasheet, PDF(60/135 Page) Renesas Technology Corp

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HD404639R Datasheet, PDF (60/135 Pages) Renesas Technology Corp – 4-Bit Single-Chip Microcomputer

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HD404639R Series

Timers

The MCU has four timer/counters (A to D).

â¢ Timer A: Free-running timer

â¢ Timer B: Multifunction timer

â¢ Timer C: Multifunction timer

â¢ Timer D: Multifunction timer

Timer A is an 8-bit free-running timer. Timers BâD are 8-bit multifunction timers, whose functions are

listed in table 24. The operating modes are selected by software.

Table 24 Timer Functions

Functions

Clock source

Prescaler S

Prescaler W

External event

Timer functions Free-running

Time-base

Event counter

Reload

Watchdog

Input capture

Timer outputs

Toggle

0 output

1 output

PWM

Note: â means not available.

Timer A

Available

Timer B

Available

Timer C

Available

Timer D

Available

Timer A

Timer A Functions: Timer A has the following functions.

â¢ Free-running timer

â¢ Clock time-base

The block diagram of timer A is shown in figure 40.

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