Figure 8.2 Example Of Additional Pulse Timing (When Upper 4 Bits In Pwdr = 1000); Table 8.5 Position Of Pulses Added To Basic Pulses - Renesas H8S/2437 Hardware Manual

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
Lower 4 Bits 0 1
0000
0001
0010
0011
0100
0101
0110
0111
1000 Yes
1001 Yes
1010 Yes
1011 Yes
1100 Yes Yes Yes
1101 Yes Yes Yes
1110 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

Figure 8.2 Example of Additional Pulse Timing (When Upper 4 Bits in PWDR = 1000)

Rev. 1.00, 09/03, page 224 of 704
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
Additional pulse
Basic Pulse No.
6 7 8 9
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
10 11 12 13
Yes
Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
14 15
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes