Rev. 1.0, 02/00, page 639 of 1141
26.8.2
Block Diagram
Figure 26.32 shows a block diagram of the capstan speed error detector.
W
W
R
UDF
OVF
Lock 2 up
Clear
Latch
Preset
CFVCR
CFRLDR
CFVCR
CFPR
CFVCR
CFVCR
CFVCR
CFUCR
CFER
CFRVCR
Error data
(16 bits)
To DFU
DVCFG
CFRUDR
Internal bus
R/W
Internal bus
R/W
W
R/W
R/W
R/W
R/W
(R)/W
Lock 1 up
S
R
F/F
Q
S
R
F/F
CFRCS1,0
CF-R/UNR
Lock counter
(2 bits)
Q
S
R
F/F
Q
Lock range
detector
Lock range data (16 bits)
Lock range data (16 bits)
CPCNT
Error data
limiter
control
circuit
CFRFON
CFESS
Error data (16 bits)
Counter (16 bits)
CFOVF
IRRCAP2
IRRCAP1
CROCKON
To DFU
Preset data (16 bits)
CFCS1,0
φ
s
φ
s/2
φ
s/4
φ
s/8
Figure 26.32 Block Diagram of Capstan Speed Error Detector