Renesas H8S/2111B User Manual
Rev. 1.00, 05/04, page 154 of 544
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 8.5 shows the positions of
the additional pulses added to the basic pulses, and figure 8.2 shows an example of additional
pulse timing.
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 8.5 shows the positions of
the additional pulses added to the basic pulses, and figure 8.2 shows an example of additional
pulse timing.
Table 8.5
Position of Pulses Added to Basic Pulses
Basic Pulse No.
Lower
4
Bits
0 1 2 3 4 5 6 7 8 9 10
11
12
13
14
15
B'0000
B'0001
Yes
B'0010
Yes Yes
B'0011
Yes Yes Yes
B'0100
Yes
Yes Yes Yes
B'0101
Yes
Yes Yes Yes
Yes
B'0110
Yes
Yes Yes Yes Yes
Yes
B'0111
Yes
Yes Yes Yes Yes Yes
Yes
B'1000
Yes
Yes
Yes Yes Yes Yes Yes
Yes
B'1001
Yes
Yes
Yes Yes Yes Yes Yes
Yes
Yes
B'1010
Yes
Yes
Yes Yes Yes Yes Yes Yes
Yes
Yes
B'1011
Yes
Yes
Yes Yes Yes Yes Yes Yes Yes
Yes
Yes
B'1100
Yes
Yes
Yes
Yes Yes Yes Yes Yes Yes Yes
Yes
Yes
B'1101
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes Yes Yes Yes Yes
B'1110
Yes Yes Yes Yes Yes Yes Yes
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
Resolution width
Additioal pulse
Figure 8.2 Example of Additional Pulse Timing (When Upper 4 Bits of PWDR = B'1000)