NEC uPD78P078 User Manual

Page 256

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256

CHAPTER 10 8-BIT TIMER/EVENT COUNTERS 5 AND 6

(3) 8-bit timer mode control register 5 (TMC5)

This register enables/stops operation of 8-bit timer register 5, sets the operating mode of 8-bit timer register

5 and controls operation of 8-bit timer/event counter 5 output control circuit.

It sets R-S flip-flop (timer output F/F 1,2) setting/resetting, the active level in PWM mode, inversion enabling/

disabling in modes other than PWM mode and 8-bit timer/event counter 5 timer output enabling/disabling.

TMC5 is set with a 1-bit or 8-bit memory manipulation instruction.

RESET input sets TMC5 to 00H.

Figure 10-5. 8-Bit Timer Output Control Register Format

Cautions 1. Timer operation must be stopped before setting TMC5.

2. If LVS5 and LVR5 are read after data are set, they will be 0.

3. Set bits 4 and 5 to 0.

TCE5 TMC56

0

0

LVS5 LVR5 TMC51 TOE5

<7>

6

5

4

<3>

<2>

1

<0>

Symbol

TMC5

FF53H

00H

R/W

Address

After Reset

R/W

TOE5 8-Bit Timer/Event Counter 5 Output Control

0

Output disabled (Port mode)

1

Output enabled

TMC51

0

Active high

1

Active low

In PWM Mode

In Other Mode

Active level selection

Timer output F/F1 control

Inversion operation disabled

Inversion operation enabled

LVS5 LVR5

0

0

0

1

1

0

1

1

8-Bit Timer/Event Counter 5 Timer
Output F/F1 Status Setting

No change

Timer output F/F1 reset (0)

Timer output F/F1 set (1)

Setting prohibited

TMC56 8-Bit Timer/Event Counter 5 Operating Mode Selection

0

Clear & start mode on match of TM5 and CR50

1

PWM mode (free-running)

TCE5

8-Bit Timer Register 5 Operation Control

0

Operation Stop (TM5 clear to 0)

1

Operation Enable

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