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20.2
Register Descriptions
20.2.1
12-Bit PWM Control Registers (CPWCR, DPWCR)
(1) CPWCR
Bit :
7
CPOL
Initial value :
0
R/W :
W
(2) DPWCR
Bit :
7
DPOL
Initial value :
0
W
R/W :
CPWCR is the PWM output control register for the capstan motor. DPWCR is the PWM output
control register for the drum motor. Both are 8-bit writable registers.
CPWCR and DPWCR are initialized to H'42 by a reset, or in sleep mode, standby mode, watch
mode, subactive mode, subsleep mode, or module stop mode of the servo circuit.
Bit 7: Polarity Invert (POL)
This bit can invert the polarity of the modulated PWM signal for noise suppression and other
purposes. This bit is invalid when fixed output is selected (when bit DC is set to 1).
Bit 7
POL
Description
0
Output with positive polarity
1
Output with inverted polarity
Bit 6: Output Select (DC)
Selects either PWM modulated output, or fixed output controlled by the pin output bits (Bits 5
and 4).
Rev. 2.0, 11/00, page 416 of 1037
6
5
CDC
CHiZ
CH/L
1
0
W
W
6
5
DDC
DHiZ
DH/L
1
0
W
W
4
3
2
CSF/DF
CCK2
0
0
0
W
W
W
4
3
2
DSF/DF
DCK2
0
0
0
W
W
W
1
0
CCK1
CCK0
1
0
W
W
1
0
DCK1
DCK0
1
0
W
W
(Initial value)
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