– 37 –• IC Block Diagrams
IC1 BU2624F-E2
1
2
3
4
5
6
7
8
9
10
20
19
18
15
14
13
12
11
16
20BIT COUNT
IF COUNT
CONTROL
SHIFT
REGISTER
LATCH
MAIN
COUNT
PRESCALLER
I/O
CONTROL
REFERENCE
DIVIDER PHASE
DETECT
17
XOUT
XIN
CE
CK
DA
CD
P0
P1
P3
P4
PD2
SD
IF2
IF1
P2
FMIN
AMIN
VSS
PD1
VDD
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
DECODER LATCH SHIFT
REGISTER CONTROL
–
+
+
–
12 3 45 6 7 8 9 10
20
19
18
17
16
15
14
13
12
11
21
22
2324
25
2627282930313233
34
35
36
37
38
39
40
41
42
43
44
LSELO
L4
L3
L2
L1
VDD
R1
R2
R3
R4
RSELO
RVRIN
RCOM
RT1
RT2
RT3
RTOUT
RSIN
RS1
RS2
RS3
RSOUT
RFIN
RFOUT
RROUT
VSS
CL
DI
CE
VREF
LROUT
LFOUT
LFIN
LSOUT
LS3
LS2
LS1
LSIN
LTOUT
LT3
LT2
LT1
LCOM
LVRIN
IC361 MM1322XFBE
1
2
3
4
5
6
7
8OUT2
VS
OUT1
GND
IN1
VCC
IN2
GND
CONTROL CIRCUIT
IC651 RN5VD23AA-TL
12 3
4
5
+
–
VREF