Rev. 1.00, 09/03, page 224 of 704
The lower four bits in 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 in PWDR are 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
0000
0001
Yes
0010
Yes
Yes
0011
Yes
Yes
Yes
0100
Yes
Yes
Yes
Yes
0101
Yes
Yes
Yes
Yes
Yes
0110
Yes
Yes
Yes
Yes
Yes
Yes
0111
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1000
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1001
Yes
Yes
Yes
Yes
Yes
Yes
Yes Yes Yes
1010
Yes
Yes
Yes Yes Yes
Yes
Yes
Yes Yes Yes
1011
Yes
Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
1100
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
1101
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes Yes Yes Yes Yes
1110
Yes Yes Yes Yes Yes Yes Yes
Yes Yes Yes Yes Yes Yes Yes
1111
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
No additional pulse
With additional pulse
Resolution width
Additional pulse
Figure 8.2 Example of Additional Pulse Timing (When Upper 4 Bits in PWDR = 1000)
Summary of Contents for H8S/2437
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