h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 333

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

11.5
A PWM waveform like the one shown in figure 11.2 is output from the PWMX pin. The value in
DADR corresponds to the total width (T
(256 pulses when CFS = 0, 64 pulses when CFS = 1). When OS = 0, this waveform is directly
output. When OS = 1, the output waveform is inverted, and the DADR value corresponds to the
total width (T
output available.
Table 11.3 summarizes the relationships between the CKS, CFS, and OS bit settings and the
resolution, base cycle, and conversion cycle. The PWM output remains fixed unless DADR
contains at least a certain minimum value.
Operation
Base cycle
(T
H
) of the high (1) output pulses. Figures 11.3 and 11.4 show the types of waveform
t
L
64 or T
t
f
256)
Figure 11.2 PWM (D/A) Operation
L
) of the low (0) pulses output in one conversion cycle
1 conversion cycle
(T
2
14
(= 16384))
Rev. 3.00 Jan 25, 2006 page 281 of 872
Section 11 14-Bit PWM Timer (PWMX)
T: Resolution
T
(When CFS = 0, m = 256
When CFS = 1, m = 64)
L
=
n = 1
m
t
Ln
(OS = 0)
REJ09B0286-0300