7-1
BLOCK DIAGRAMS
System Control Block Diagram
L3821BLS
77
12
63
2
62
79
SCL
AFT
-IN
AFT
-IN
INPUT0
INPUT1
PR
O
TECT
-2
PR
O
TECT
-1
PR
O
TECT
-3
P-ON-H
SD
A
REMO
TE
SENSOR
KEY
SWITCH
75
32
36
28
DG-ON-H
+5V
-CTRL
+1.8V
-CTRL
RESET
DTV
-H
+8V
-CTRL
DG-ON-H
+5V
-CTRL
+1.8V
-CTRL
+8V
-CTRL
TO
PO
WER SUPPL
Y
BLOCK
TO
CR
T/H.V
. BLOCK
PR
O
TECT
-2
PR
O
TECT
-1
PR
O
TECT
-3
P-ON-H
KEY
-IN2
KEY
-IN1
RCV
-IN
RCV401
IC421
(MEMOR
Y)
SCL
6
SD
A
5
V
OLUME
60
61
8
4
74
73
1
PR
O
TECT
-1
7
CS
78
I2C-OPEN
IC301
TV MICON/VIDEO
/A
UDIO/CHR
OMA
/DEFLECTION
TO
IF/VIDEO BLOCK
9
INPUT3
5
3
RESET
DTV
-H
TO
A
UDIO BLOCK
V
OLUME
A
U
DIO-MUTE
MAIN CB
A
INPUT1
INPUT0
INPUT3
SCL
SD
A
TO
A
U
DIO BLOCK
TO
DTV BLOCK
10
A
UDIO-MUTE
SCL
SD
A
DTV
-S-REQ
DTV
-S-SCLK
DTV
-S-SIN
DTV
-S-SOUT
DTV
-S-REQ
DTV
-S-SCLK
DTV
-S-SIN
DTV
-S-SOUT
67
68
70
72
DTV
-S-RESET
DTV
-S-RESET
64
