Rev. 2.0, 11/00, page 925 of 1037
H'D038: Drum Speed Error Detection Control Register DFVCR: Drum 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
1
φ
s/2
1 0
φ
s/4
1
φ
s/8
Counter overflow flag
0 Normal status
1 Counter overflows.
Error data limit function select bit
0 Limit function OFF
1 Limit function ON
Drum lock flag
0 Drum speed system is not locked.
1 Drum speed system is locked.
Drum phase system filter computation auto start bit
0 Filter computation by drum lock detection is not excuted.
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
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.
Содержание Hitachi H8S/2191
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