Figure 10.2 Example Of Additional Pulse Timing (When Upper 4 Bits Of Pwdr = B'1000); Table 10.5 Position Of Pulses Added To Basic Pulses - Renesas H8S/2158 User Manual

The lower four bits of PWDR specify the position of pulses added to the 16 basic pulses. An
additional pulse adds a high period (when OS = 0) with a width equal to the resolution before the
rising edge of a basic pulse. When the upper four bits of PWDR are B'0000, there is no rising edge
of the basic pulse, but the timing for adding pulses is the same. Table 10.5 shows the positions of
the additional pulses added to the basic pulses, and figure 10.2 shows an example of additional
pulse timing.

Table 10.5 Position of Pulses Added to Basic Pulses

Lower 4 Bits
0
B'0000
B'0001
B'0010
B'0011
B'0100
B'0101
B'0110
B'0111
B'1000 Yes
B'1001 Yes
B'1010 Yes
B'1011 Yes
B'1100 Yes Yes Yes
B'1101 Yes Yes Yes
B'1110 Yes Yes Yes Yes Yes Yes Yes
B'1111 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
No additional pulse
With additional pulse

Figure 10.2 Example of Additional Pulse Timing (When Upper 4 Bits of PWDR = B'1000)

1 2 3 4 5
Yes
Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Resolution width
Basic pulse
Section 10 8-Bit PWM Timer (PWM)
Basic Pulse No.
6 7 8 9 10
Yes
Yes
Yes
Yes
Yes
Yes Yes
Yes Yes
Yes Yes
Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes Yes Yes Yes Yes
Yes Yes Yes Yes Yes Yes Yes
Rev. 3.00 Jan 25, 2006 page 271 of 872
11 12 13 14
Yes
Yes
Yes Yes
Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
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