Rev. 1.0, 02/00, page 670 of 1141
Capstan System Digital Filter Control Register (CFIC)
0
0
1
0
R/W
2
0
R/W
3
0
4
0
R/W
5
0
6
0
7
—
—
R/W
R/W
R/(W)
CPHA
R/(W)*
CROV
CZPON
CZSON
CSG2
CSG1
CSG0
1
Note: * Only 0 can be written
Bit :
Initial value :
R/W :
CFIC is an 8-bit read/write register that controls the status of the capstan digital filter and
operating mode. Only a byte access is valid. If a word access is attempted, correct operation is not
guaranteed. CFIC is initialized to H'80 by a reset, and in standby mode and module stop mode.
Bit 7
Reserved: Cannot be modified and is always read as 1.
Bit 6
Capstan System Range Over Flag (CROV): This flag is set to 1 when the result of a
filter computation exceeds 12 bits in width. To clear this flag, write 0 after reading 1.
Bit 6
DROV
Description
0
Indicates that the filter computation result did not exceed 12 bits.
(Initial value)
1
Indicates that the filter computation result exceeded 12 bits.
Bit 5
Capstan Phase System Filter Start (CPHA): Starts or stops filter processing for capstan
phase system.
Bit 5
CPHA
Description
0
Phase filter computations are disabled.
Phase computation result (Y) is not added to Es (see figure 26.39).
(Initial value)
1
Phase filter computations are enabled.