User’s Manual U15075EJ2V1UD
137
CHAPTER 7 8-BIT TIMERS 50, 60
7.1 8-Bit Timers 50, 60 Functions
An 8-bit timer (one channel, timer 50) and an 8-bit timer/event counter (one channel, timer 60) are incorporated in
the
µ
PD789426, 789436, 799446, 789456 Subseries. The operation modes listed in the following table can be set via
mode register settings.
Table 7-1. Operation Modes
Channel
Mode
Timer 50
Timer 60
8-bit timer counter mode
(Discrete mode)
Available Available
16-bit timer counter mode
(Cascade connection mode)
Available
Carrier generator mode
Available
PWM output mode
Available
(Free-running mode)
Available
(Pulse generator mode)
(1) 8-bit timer counter mode (discrete mode)
The following functions can be used in this mode.
•
Interval timer with 8-bit resolution
•
External event counter with 8-bit resolution (timer 40 only)
•
Square wave output with 8-bit resolution
(2) 16-bit timer counter mode (cascade connection mode)
Operation as a 16-bit timer/event counter is enabled during cascade connection mode.
The following functions can be used in this mode.
•
Interval timer with 16-bit resolution
•
External event counter with 16-bit resolution
•
Square wave output with 16-bit resolution
(3) Carrier generator mode
The carrier clock generated by timer 60 is output in cycles set by timer 50.
(4) PWM output mode
(a) Timer 50: Free-running mode
The timer output status inverts repeatedly due to a match between TM50 and CR50 and TM50
overflow, and pulses of any duty ratio are output.
Содержание U789436 Series
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