Table of Contents
Advertisement
19.2
Register Descriptions
19.2.1
12-Bit PWM Control Registers (CPWCR, DPWCR)
CPWCR
Bit :
CPOL
Initial value :
R/W :
DPWCR
Bit :
DPOL
Initial value :
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 when in standby or module-stop mode.
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. 1.0, 02/00, page 372 of 1141
7
6
CDC
CHiZ
0
1
W
W
7
6
DDC
DHiZ
0
1
W
5
4
CH/L
CSF/DF
0
0
W
W
5
4
DH/L
DSF/DF
0
0
W
W
3
2
CCK2
CCK1
0
0
W
W
3
2
DCK2
DCK1
0
0
W
W
1
0
CCK0
1
0
W
W
1
0
DCK0
1
0
W
W
(Initial value)
Advertisement
Table of Contents
