Rev. 1.0, 02/00, page 649 of 1141
R/W
R/W
R/W
R/W
R/W
R/W
CREF
REF30P
CAPREF30
RECREF
DVCFG2
DVCTL
CPGCR
R/W
CR/RF
CPGCR
DFUCR
CPGCR
CPPR1
CPPR2
R/(W)
S
R
F/F
Q
W
W
Internal bus
Internal bus
OVF
LSB
MSB
CPER1
CPER2
LSB
MSB
CPOVF
CFEPS
SELCFG2
R/W
CTLM
R/P
ASM
Latch
Preset
Error data (20 bits)
To DFU
Sequence
controller
Error data
(16 bits)
Error data
(4 bits)
Preset data
(16 bits)
Preset
PB: X value + TRK value = CAPREF30
REC: REF30P or CREF
Latch
PB : DVCTL
REC : DVCFG2Ê
Preset data
(4 bits)
Counter (20 bits)
IRRCAP3
CPCS1,0
φ
s
φ
s/2
φ
s/4
φ
s/8
φ
s = fosc/2
Figure 26.34 Block Diagram of Capstan Phase Error Detector