h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 316
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h8s-2158
Manufacturer Part Number
h8s-2158
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2158.pdf
(927 pages)
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Section 10 8-Bit PWM Timer (PWM)
10.3.1
PWSL is used to select the input clock and the PWM data register.
Rev. 3.00 Jan 25, 2006 page 264 of 872
REJ09B0286-0300
Bit
7
6
5
4
Bit Name
PWCKE
PWCKS
—
—
PWM Register Select (PWSL)
Initial Value
0
0
1
0
R/W
R/W
R/W
R
R
Description
PWM Clock Enable
PWM Clock Select
These bits, together with bits PWCKB and PWCKA in
PCSR, select the internal clock input to TCNT in the
PWM. For details, see table 10.2.
The resolution, PWM conversion period, and carrier
frequency depend on the selected internal clock, and
can be obtained from the following equations.
Resolution (minimum pulse width) = 1/internal clock
frequency
PWM conversion period = resolution
Carrier frequency = 16/PWM conversion period
With a 20-MHz system clock ( ), the resolution, PWM
conversion period, and carrier frequency are as shown
in table 10.3.
Reserved
This bit is always read as 1 and cannot be modified.
Reserved
This bit is always read as 0 and cannot be modified.
256
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