HD404339 Datasheet, PDF(39/80 Page) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer with large-capacity memory

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HD404339 Datasheet, PDF (39/80 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer with large-capacity memory

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HD404339 Series

Timers

The MCU has three built-in timers A, B, and C. The functions of each timer are listed in table 7.

Timer A

Timer A is an 8-bit free-running timer that can also be used as a clock time-base with a 32.768-kHz

subsystem oscillator. Timer A has the following features:

â¢ One of eight internal clocks can be selected from prescaler S according to the setting of timer mode

â¢ In time-base mode, one of five internal clocks can be selected from prescaler W according to the setting

of timer mode register A

â¢ An interrupt request can be generated when timer counter A (TCA) overflows

â¢ Input clock frequency must not be modified during timer A operation

Table 7 Timer Functions

Functions

Clock source

Timer functions

Timer output

Prescaler S

Prescaler W

External event

Free-running

Time base

Event counter

Reload

Watchdog

Input capture

PWM

Timer A

Available

Timer B

Available

Timer C

Available

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