Rev. 2.0, 11/00, page 613 of 1037
4-head
special
playback
controller
- +
SV1(P82)
EXCAP(P81)
( )
SV2(P83)
( )
EXCTL(PS4)
)
+
+
+
+
+
- +
+ -
-
CTL
Head
CTL Amp
CTL
Head
CFG
CA P
PWM
DRM
PWM
DFG
DPG(PS3)
VIDEOFF
AUDIOFF
Vpulse
H.Amp SW(PS1)
C.ROTARY(PS0)
COMP(PS2)
Csync
EXTTRG/(P80)
OSCH
REC:ON
ADTRIG
(HSW)
Ep
PWM
Es
Es
Ep
REC
REC
PB.ASM
CTLFB
PB.CTL
PB.
ASM
(NTSC)
DVCTL
Gain control
by register
setting
REF30,REF30X,CREF,
CTLMONI,DVCFG,
DFG,DPG,DFG,etc
Internal signal
monitor
controller
(PAL)
REF30X
REC-CTL
DutyI/O
(Duty deter-
minator)
(Assemble
recording)
DVCFG
DVCFG2
Gain up.
XE:ON
VD
PR0 to 7/
(P60 to 67)
Sync
detector
REC-CTL
generator
VISS
circuit
Noise
Det.
A/D
converter
Timer X1
Timer L
Timer R
AN pins
PWM
X-value
adjustment
Gain up.
PR0 to 7/
(P60 to 67)
PPG0 to 7/
(P70 to 77)
PPG0 to 7/
(P70 to 77)
REF30P(PB:30Hz,REC:1/2VD)
CREF
Res
System
clock
Additional
V pulse
generator
Head-switch
timing
generator
Drum system
reference
signal
Capstan
system
reference
signal
Phase
error
detector
Phase
error
detector
Digital
filter
Digital
filter
Digital
filter
Digital
filter
Frequency
divider
Frequency
divider
Speed
error
detector
Speed
error
detector
Figure 28.1 Block Diagram of Servo Circuits
Summary of Contents for Hitachi H8S/2191
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