Register Descriptions; Pwm Control Register (Pwcr) - Renesas Hitachi H8S/2194 Series Hardware Manual

21.2

Register Descriptions

21.2.1

PWM Control Register (PWCR)

Bit : 7
—
Initial value : 1
—
R/W :
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
They are always read as 1. Writes are disabled.
Bit 0: Clock Select (PWCR0)
Selects the clock supplied to the 14-bit PWM.
Bit 0
PWCR0 Description
The input clock is φ/2 (tφ = 2/φ)
0
The conversion period is 16384/φ, with a minimum modulation width of 1/φ
The input clock is φ/4 (tφ = 4/φ)
1
The conversion period is 32768/φ, with a minimum modulation width of 2/φ
Note: t/φ: Period of PWM clock input
Rev. 2.0, 11/00, page 426 of 1037
6 5 4
— — —
1 1 1
— — —
3 2 1
— — —
1 1 1
— — —
0
PWCR0
0
R/W
(Initial value)