Rev. 1.0, 02/00, page 1013 of 1141
H'D07B: Capstan 12-Bit PWM Control Registor CPWCR: Capstan 12-Bit PWM
0
0
1
1
W
2
0
W
3
0
4
0
W
0
W
5
6
1
7
CH/L
CSF/DF
CCK2
CCK1
CCK0
0
W
CPOL
W
W
W
CDC
CHiZ
Positive polarity
(Initial value)
Negative polarity output
0
1
Polarity switchover bit
Fixed output bit, PWM pin output bit
0
1
0
Low level output from PWM pin
(Initial value)
CHiZ
CH/L
CDC
Description
1
High level output form PWM pin
1
0
*
High impedance from PWM pin
*
*
PWM modulated signal output
Note: * Don't care.
Modulate error data from digital filter circuit
(Initial value)
Modulate data written in data register
0
1
Output data select bit
Note: When PWMs output data from the digital filter circuit, the data consisting of the speed and phase
filtering results are modulated by PWMs and output from the CAPPWM pin.
However, it is possible to output only drum phase filter results from CAPPWM pin,
by DFUCR settings of the digital filter circuit.
See the section explaining the digital filter computation circuit.
Carrier frequency select bits
Description
0
0
0
Carrier frequency is
φ
/2
CCK1
CCK0
CCK2
1
Carrier frequency is
φ
/4
1
0
Carrier frequency is
φ
/8
(Initial value)
1
Carrier frequency is
φ
/16
0
1
0
Carrier frequency is
φ
/32
1
Carrier frequency is
φ
/64
1
0
Carrier frequency is
φ
/128
1
(Do not set)
Bit
Initial value
R/W
:
:
: