IBM nec pd78p081(a2) User Manual

Setting the 8-bit timer mode control registers 5 and 6 (TMC5 and TMC6) as shown in Figure 6-13 allows operation

as PWM output.  Pulses with the duty ratio determined by the values preset in the 8-bit compare registers 50 and

60 (CR50 and CR60) output from the TO5/P100/TI5 or TO6/P101/TI6 pin.

Select the active level of PWM pulse with bit 1 (TMC51) of 8-bit timer mode control register 5 (TMC5) or bit 1

(TMC61) of 8-bit timer mode control register 6 (TMC6).

This PWM pulse has an 8-bit resolution.  The pulse can be converted into an analog voltage by integrating it with

an external low-pass filter (LPF).  Count clock of 8-bit timer register 5 (TM5) can be selected with timer clock select

register 5 (TCL5) and count clock of 8-bit timer register 6 (TM6) can be selected with timer clock select register 6

(TCL6).

PWM output enable/disable can be selected with bit 0 (TOE5) of TMC5 or bit 0 (TOE6) of TMC6.

Remarks 1. n = 5, 6

×

 :  don’t care

1

TCEn

1

TMCn6

0

0

×

LVSn LVRn TMCn1 TOEn

TMCn

×

0/1

1

TOn output enable

Sets active level

PWM mode

TMn operation enable