HD404669 Datasheet, PDF(57/142 Page) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

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HD404669 Datasheet, PDF (57/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

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HD404669 Series

Timers

The MCU has three timer/counters (A, C, D).

â¢ Timer A: Free-running timer

â¢ Timer C: Multifunction timer

â¢ Timer D: Multifunction timer

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

listed in table 18. The operating modes are selected by software.

Table 18 Timer Functions

Functions

Clock

Prescaler S

source

Prescaler W

External event

Timer

Free-running

functions Time-base

Event counter

Reload

Watchdog

Input capture

Timer

Toggle

outputs

0 output

1 output

PWM

Note: â implies not available.

Timer A

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 39.

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