– 51 –
2
1
RLO1
TLO1
TLI1
RLI1
CPR
GND
RXO
RXI
RLI2
RLO2
TLO2
TLI2
CPT
VB
FI
4
VCC
3
CD
FO
+
–
+
–
5
9
8
7
6
HTI
TXO
TXI
HTO+
HTO–
10
12
11
14
13
27
28
25
26
24
20
21
22
23
19
17
18
15
16
MUT
MCO
MCI
CT
VLC
VR
VCC
HYBRID
AMP 2
HYBRID
AMP 1
MIC
AMP
VREF
+
–
VR
FILTER
AMP
COMPARATOR
AGC
BACKGROUND
NOISE
DETECTOR
VR
LEVEL
DETECTOR
LEVEL
DETECTOR
COMPARATOR
ATTENUATOR
CONTROL BLOCK
BACKGROUND
NOISE
DETECTOR
DIAL
TONE
DETECTOR
LEVEL
DETECTOR
LEVEL
DETECTOR
RX
ATTEN-
UATOR
TX
ATTENUATOR
1
2
3
4
5
6
7
8
9
10
16
15
14
13
12
11
SHIFT REGISTER
LATCH
PARALLEL DATA
OUTPUT
GND
VCC
LATCH
CLOCK
PARALLEL DATA
OUTPUT
SERIAL DATA
INPUT
OUTPUT
ENABLE
SHIFT
CLOCK
SERIAL DATA
OUTPUT
RESET
QB
QC
QD
QE
QF
QG
QH
SQH
A
QA
U1019
U4082B
– BASE KEY Board –
U1
MC74HC595AF
– HAND MAIN Board –
U1007
LP29811M5-3.0
OVER CURRENT/
OVER TEMP
PROTECTION
3
2
5
4
REGULATOR
REFERENCE
VOLTAGE
1
ON/OFF
GND
VIN
VOUT
N/C