NEC PD78056F User Manual

The 16-bit timer/event counter (TM0) has the following functions.

• Interval timer

• PWM output

• Pulse width measurement

• External event counter

• Square-wave output

• One-shot pulse output

PWM output and pulse width measurement can be used at the same time.

TM0 generates interrupts request at the preset time interval.

Minimum Interval Time

Maximum Interval Time

 Resolution

MCS = 1

MCS = 0

MCS = 1

MCS = 0

MCS = 1

MCS = 0

2 

×

 TI00 input cycle

2

16

 

×

 TI00 input cycle

TI00 input edge cycle

—

2 

×

 1/f

X

—

2

16

 

×

 1/f

X

—

1/f

X

(400 ns)

(13.1 ms)

(200 ns)

2 

×

 1/f

X

2

2

 

×

 1/f

X

2

16

 

×

 1/f

X

2

17

 

×

 1/f

X

1/f

X

2 

×

 1/f

X

(400 ns)

(800 ns)

(13.1 ms)

(26.2 ms)

(200 ns)

(400 ns)

2

2

 

×

 1/f

X

2

3

 

×

 1/f

X

2

17

 

×

 1/f

X

2

18

 

×

 1/f

X

2 

×

 1/f

X

2

2

 

×

 1/f

X

(800 ns)

(1.6 

µ

s)

(26.2 ms)

(52.4 ms)

(400 ns)

(800 ns)

2

3

 

×

 1/f

X

2

4

 

×

 1/f

X

2

18

 

×

 1/f

X

2

19

 

×

 1/f

X

2

2

 

×

 1/f

X

2

3

 

×

 1/f

X

(1.6 

µ

s)

(3.2 

µ

s)

(52.4 ms)

(104.9 ms)

(800 ns)

(1.6 

µ

s)

2 

×

 watch timer output cycle

2

16

 

×

 watch timer output cycle

Watch timer output edge cycle

Remarks 1. f

X

:  Main system clock oscillation frequency

2. MCS:  Bit 0 of oscillation mode selection register (OSMS)

3. Values in parentheses when operated at f

X

 = 5.0 MHz

TM0 can generate 14-bit resolution PWM output.

TM0 can measure the pulse width of an externally input signal.

TM0 can measure the number of pulses of an externally input signal.