Datasheet

Section 16 Timer RD

REJ09B0465-0300 Rev. 3.00 Page 583 of 982

Sep 17, 2010

H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group

Figures 16.48 and 16.49 show the operation examples when buffer operation has been designated

for GRB_0 and GRD_0 in complementary PWM mode. These are examples when a PWM

waveform of 0% duty is created by using the buffer operation and performing GRD_0 ≥ GRA_0.

Data is transferred from GRD_0 to GRB_0 according to the settings of CMD0 and CMD1 when

TRDCNT_0 and GRA_0 are compared and their contents match or when TRDCNT_1 underflows.

However, when GRD_0 ≥ GRA_0, data is transferred from GRD_0 to GRB_0 when TRDCNT_1

underflows regardless of the setting of CMD0 and CMD1. When GRD_0 = H'0000, data is

transferred from GRD_0 to GRB_0 when TRDCNT_0 and GRA_0 are compared and their

contents match regardless of the settings of CMD0 and CMD1.

GRA_0

H'0000

H'0999

FTIOB0

FTIOD0

TRDCNT_0

TRDCNT values

Time

GRB_0 (When restored, data will be transferred

to the saved location regardless of the

CMD1 and CMD0 values)

TRDCNT_1

H'0999

H'1FFF

H'0999

GRD_0

H'1FFF

GRB_0

Figure 16.48 Buffer Operation (3)

(Buffer Operation in Complementary PWM Mode CMD1 = CMD0 = 1)