Rev. 1.0, 02/00, page 994 of 1141
H'D038: Drum Speed Error Detection Control Register
DFVCR: Drum Speed Error Detector
0
0
1
0
(R)/W
*2
2
0
R/W
3
0
4
0
R/W
0
R/(W)
*1
5
6
0
7
DFRFON DF-R/UNR
DPCNT
DFRCS1
DFRCS0
0
R/W
DFCS1
(R)/W
*2
R
R/W
DFCS0
DFOVF
Notes:
Clock source select bit
DFCS1 DFCS0
0 0
φ
s (Initial value)
1
φ
s/2
1 0
φ
s/4
1
φ
s/8
Counter overflow flag
0 Normal status (Initial value)
1 Counter overflows.
Error data limit function select bit
0 Limit function OFF (Initial value)
1 Limit function ON
Drum lock flag
0 Drum speed system is not locked. (Initial value)
1 Drum speed system is locked.
Drum phase system filter computation auto start bit
0 Filter computation by drum lock detection is not excuted. (Initial value)
1 Filter computation of phase system is executed at the time of
drum lock detection.
Drum lock counter setting bit
DFRCS1 DFRCS0 Description
0 0 Underflow by 1 lock detection (Initial value)
1 Underflow by 2 lock detections
1 0 Underflow by 3 lock detections
1 Underflow by 4 lock detections
Description
Bit :
Initial value :
R/W :
1. Only 0 can be written.
2. When read, counter value is read.