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UPD17708 Datasheet(PDF) 206 Page - Renesas Technology Corp

Part # UPD17708
Description  MOS INTEGRATED CIRCUIT
PDF  358 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

UPD17708 Datasheet(HTML) 206 Page - Renesas Technology Corp

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µPD17704, 17705, 17707, 17708, 17709
15.3 PWM Output Selection Block
The output selection block specifies whether each output pin of the D/A converter is used for the D/A converter
or as a general-purpose output port, by using the PWM2SEL through PWM0SEL flags of the PWM/general-purpose
port pin function selection register.
Figure 15-3 shows the configuration of the output selection block, and Figure 15-4 shows the configuration of the
PWM/general-purpose port pin function selection register.
Each pin can be changed between the D/A converter mode and general-purpose output port mode independently
of the others.
Because each output pin is an N-ch open-drain output pin, an external pull-up resistor is necessary.
When the D/A converter is used as timer 3, the P1B2/PWM2 through P1B0/PWM0 pins are automatically set in
the general-purpose output port mode, regardless of the values set to the PWM2SEL through PWM0SEL flags.
Figure 15-3. Configuration of Output Selection Block
PWM2SEL through PWM0SEL flags
TM3SEL
Comparator output
Output latch
1
0
Each output pin



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