Rev. 1.0, 02/00, page 1012 of 1141
H'D07A: Drum 12-Bit PWM Control Registor DPWCR: Drum 12-Bit PWM
0
0
1
1
W
2
0
W
3
0
4
0
W
0
W
5
6
1
7
DH/L
DSF/DF
DCK2
DCK1
DCK0
0
W
DPOL
W
W
W
DDC
DHiZ
Positive polarity output
(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)
DHiZ
DH/L
DDC
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 DRMPWM pin.
However, it is possible to output only capstan phase filter result from DRMPWM 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
DCK1
DCK0
DCK2
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
:
:
: