Rainbow Electronics U6820BM - Manual (Page 6)

6
U6820BM
4527A–BCD–03/02
Figure 4. Block Diagram of the Control Interface
CL
DIN
EN
Q7
H4
Q6
H3
Q5
H2
Q4
H1
Q3
L4
Q2
L3
Q1
L2
Q0
L1
Shift register SR
P-ON-Reset
Th-protection
DI
CS
CLK
R
CL NQ
D
DFF
Q CL
R NQ
D
DFF
Q
L
S
1
_
O
N
IS
C
_
L
S
1
IS
C
_
L
S
2
IS
C
_
L
S
3
IS
C
_
L
S
4
IS
C
_
H
S
1
IS
C
_
H
S
2
IS
C
_
H
S
4
L
S
2
_
O
N
L
S
3
_
O
N
L
S
4
_
O
N
H
S
1
_
O
N
H
S
2
_
O
N
H
S
3
_
O
N
H
S
4
_
O
N
IS
C
_
H
S
3
STATUS
S
T
D
_
B
Y
R
CL NQ
D Q
DFF
Serial-Parallel Interface
CLK
12
13
11
14
R
CL NQ
D
DFF
Q
norm = 0
n
o
rm
=
0
Load CR
LSB
h if 8
h if 4
h if 2
All norm = 0
CL
R
D Q
DFF
NQ
POR norm=0
8CLK
Q1
2
Q2
4
Q3
8
CL
R
EN
Q0
1
Counter
NR NQ
CL
DIN
NR NQ
DIN
NR NQ
DIN
NR NQ
DIN
NR NQ
DIN
NR NQ
DIN
NR NQ
DIN
NR NQ
DIN
Command register BR