Sample External Circuits - Renesas Hitachi H8S/2194 Series Hardware Manual

E.3

Sample External Circuits

Examples of external circuits for the servo section, and sync signal detection circuit are shown in
figures E.3, E.4.
(1) Servo Section
An example of the external circuit for the DRMPWM output and CAPPWM output pins is
shown in figure E.3.
Figure E.3 Sample External Circuit for Servo Section
(2) Sync Signal Detection Circuit Section
Figure E.4 shows an example of the external circuit for the sync signal detection circuit section.
Note: The figures shown are reference values.
Figure E.4 Example of External Circuit for Sync Signal Detection Circuit Section
DRMPWM
CAPPWN
Csync
Careful consideration should be given to board floating capacitance
and wiring characteristics when deciding on the constants.
R
1
C
1
33 k
10 pF
Rev. 2.0, 11/00, page 1035 of 1037