HD6433802H Datasheet, PDF (293/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

Section 11 10-Bit PWM
11.1 Overview
The H8/3802 Series is provided with two on-chip 10-bit PWMs (pulse width modulators),
designated PWM1 and PWM2, with identical functions. The PWMs can be used as D/A
converters by connecting a low-pass filter. In this section the suffix m (m = 1 or 2) is used with
register names, etc., as in PWDRLm, which denotes the PWDRL registers for each PWM.
11.1.1 Features
Features of the 10-bit PWMs are as follows.
• Choice of four conversion periods
Any of the following conversion periods can be chosen:
4,096/ø, with a minimum modulation width of 4/ø
2,048/ø, with a minimum modulation width of 2/ø
1,024/ø, with a minimum modulation width of 1/ø
512/ø, with a minimum modulation width of 1/2 ø
• Pulse division method for less ripple
• Use of module standby mode enables this module to be placed in standby mode independently
when not used.
275