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Section 14 14-Bit PWM D/A
14.1
Overview
The H8S/2633 Series has an on-chip 14-bit pulse-width modulator (PWM) with four output
channels.
Each channel can be connected to an external low-pass filter to operate as a 14-bit D/A converter.
Both channels share the same counter (DACNT) and control register (DACR).
14.1.1
Features
The features of the 14-bit PWM D/A are listed below.
•
The pulse is subdivided into multiple base cycles to reduce ripple.
•
Two resolution settings and two base cycle settings are available
The resolution can be set equal to one or two system clock cycles. The base cycle can be set
equal to T
×
64 or T
×
256, where T is the resolution.
•
Four operating rates
The two resolution settings and two base cycle settings combine to give a selection of four
operating rates.
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...