p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 245

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

10.5
A PWM waveform like the one shown in figure 10.3 is output from the PWMX pin. DA13 to DA0
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 DA13 to DA0 in DADR value
corresponds to the total width (T
types of waveform output available.
Table 10.4 summarizes the relationships between the CKS and CFS bit settings and the resolution,
base cycle, and conversion cycle. The PWM output remains fixed unless DA13 to DA0 in DADR
contain at least a certain minimum value. The relationship between the OS bit and the output
waveform is shown in figures 10.4 and 10.5.
Operation
Base cycle
(T × 64 or T × 256)
t
L
t
f
Figure 10.3 PWMX (D/A) Operation
H
) of the high (1) output pulses. Figures 10.4 and 10.5 show the
L
) of the low (0) pulses output in one conversion cycle
1 conversion cycle
(T × 2
14
(= 16384))
T: Resolution
T
(When CFS = 0, m = 256
When CFS = 1, m = 64)
Rev. 1.00 Sep. 21, 2006 Page 207 of 658
L
= Σ t
Section 10 14-Bit PWM Timer (PWMX)
n = 1
m
Ln
(OS = 0)
REJ09B0310-0100