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Section 11 14-Bit PWM
Rev. 6.00 Sep 12, 2006 page 341 of 526
REJ09B0326-0600
Section 11 14-Bit PWM
11.1 Overview
The H8/3644 Group is provided with a 14-bit PWM (pulse width modulator) on-chip, which can
be used as a D/A converter by connecting a low-pass filter.
11.1.1 Features
Features of the 14-bit PWM are as follows.
•
Choice of two conversion periods
A conversion period of 32,768/
φ
, with a minimum modulation width of 2/
φ
or a conversion
period of 16,384/
φ
, with a minimum modulation width of 1/
φ
can be chosen.
•
Pulse division method for less ripple
11.1.2 Block
Diagram
Figure 11.1 shows a block diagram of the 14-bit PWM.
Internal data bus
PWDRL
PWDRU
PWCR
PWM
waveform
generator
φ
/2
φ
/4
Legend:
PWDRL:
PWDRU:
PWCR:
PWM data register L
PWM data register U
PWM control register
PWM
Figure 11.1 Block Diagram of the 14-Bit PWM
Содержание F-ZTAT H8/3642A Series
Страница 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Страница 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Страница 21: ...Rev 6 00 Sep 12 2006 page xix of xx Appendix E Product Code Lineup 522 Appendix F Package Dimensions 524 ...
Страница 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Страница 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Страница 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Страница 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Страница 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Страница 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Страница 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...