HD6473847RHV Datasheet, PDF (342/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 11 10-Bit PWM
11.3.2 PWM Data Registers U and L (PWDRU, PWDRL)
PWDRU and PWDRL indicate high level width in one PWM waveform cycle. PWDRU and
PWDRL are 10-bit write-only registers, with the upper 2 bits assigned to PWDRU and the lower 8
bits to PWDRL. When read, all bits are always read as 1.
Both PWDRU and PWDRL are accessible only in bytes. Note that the operation is not guaranteed
if word access is performed. When 10-bit data is written in PWDRU and PWDRL, the contents
are latched in the PWM waveform generator and the PWM waveform generation data is updated.
When writing the 10-bit data, the order is as follows: PWDRL to PWDRU.
PWDRU and PWDRL are initialized to H'FC00.
Rev. 7.00 Mar. 08, 2010 Page 310 of 510
REJ09B0024-0700