Register Descriptions; Pwm Control Register (Pwcr) - Hitachi H8S/2199 Hardware Manual

Single-chip microcomputer

Table of Contents

Register Descriptions

Initial value :

The PWM control register (PWCR) is an 8-bit read/write register that controls the 14-bit PWM

functions. PWCR is initialized to H'FE by a reset.

Bits 7 to 1    Reserved: These bits cannot be modified and are always read as 1.

Bit 0    Clock Select (PWCR0): Selects the clock supplied to the 14-bit PWM.

The input clock is φ/2 (tφ = 2/φ)

The conversion period is 16384/φ, with a minimum modulation width of 1/φ

The input clock is φ/4 (tφ = 4/φ)

The conversion period is 32768/φ, with a minimum modulation width of 2/φ

Note: t/φ: Period of PWM clock input

Rev. 1.0, 02/00, page 382 of 1141

(Initial value)