HD64F3687GHV Datasheet, PDF (294/566 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 13 Timer Z
Figures 13.42 and 13.43 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 CMD_0 and CMD_1 when
TCNT_0 and GRA_0 are compared and their contents match or when TCNT_1 underflows.
However, when GRD_0 ≥ GRA_0, data is transferred from GRD_0 to GRB_0 when TCNT_1
underflows regardless of the setting of CMD_0 and CMD_1. When GRD_0 = H'0000, data is
transferred from GRD_0 to GRB_0 when TCNT_0 and GRA_0 are compared and their contents
match regardless of the settings of CMD_0 and CMD_1.
TCNT values
GRA_0
H'0999
TCNT_0
TCNT_1
GRB_0 (When restored, data will be transferred
to the saved location regardless of the
CMD1 and CMD0 values)
H'0000
Time
GRD_0 H'0999
GRB_0 H'0999
H'1FFF
H'0999 H'1FFF
H'0999
H'0999
FTIOB0
FTIOD0
Figure 13.42 Buffer Operation (3)
(Buffer Operation in Complementary PWM Mode CMD1 = CMD0 = 1)
Rev. 3.00 Sep. 10, 2007 Page 260 of 528
REJ09B0216-0300