Rev. 1.0, 02/00, page 382 of 1141
20.2
Register Descriptions
20.2.1
PWM Control Register (PWCR)
0
0
1
1
2
1
3
1
4
1
5
1
6
1
7
—
—
—
—
—
—
—
—
—
—
—
—
—
—
R/W
PWCR0
1
Bit :
Initial value :
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: 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.
Bit 0
PWCR0
Description
0
The input clock is
φ
/2 (t
φ
= 2/
φ
)
(Initial value)
The conversion period is 16384/
φ
, with a minimum modulation width of 1/
φ
1
The input clock is
φ
/4 (t
φ
= 4/
φ
)
The conversion period is 32768/
φ
, with a minimum modulation width of 2/
φ
Note:
t/
φ
: Period of PWM clock input