HD404339 Datasheet, PDF (46/80 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer with large-capacity memory

HD404339 Series
Timer C
Timer C is an 8-bit multifunction timer that includes free-running, reload, and watchdog timer features,
which are described as follows.
• By setting timer mode register C (TMC: $00D), one of eight internal clocks supplied from prescaler S
can be selected
• By selecting pin TOC with bit 2 (PMRA2) of port mode register A (PMRA: $004), timer C output
(PWM output) is enabled
• By setting timer write register CL, U (TWCL, U: $00E, $00F), timer counter C (TCC) can be written to
• By setting timer read register CL, U (TRCL, U: $00E, $00F), the contents of timer counter C can be
read out
• An interrupt can be requested when timer counter C overflows
• Timer counter C can be used as a watchdog timer for detecting runaway programs
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