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U4 TA31103F (BASE MAIN Board)
U7 TA31103F (HAND MAIN Board)
24
23
22
21
∆G
–
+
PRE AMP
VREF
FILTER
FILTER
AMP 1
AMP 2
+
+
–
–
2
1
3
4
U7 BR93LC46F-E2 (BASE MAIN Board)
COMMAND DECODE
CS
1
CONTROL,
CLK
2
CLOCK GENERATION
COMMAND
REGISTER
ADDRESS
BUFFER
DATA
DI
3
REGISTER
DUMMY
DO
4
BIT
20
19
EXP
SUM
MUTE
AMP
VREF
–
+
THROUGH
VREF
THROUG
COMP
MUTE
VREF
IN 2
AMP
+
–
∆G
5
6
7
POWER SUPPLY VOLTAGE
DETECTION
WRITING
HIGH VOLTAGE
INHIBIT
GENERATION
6BIT
6BIT
ADDRESS
DECODER
16BIT
R/W
AMP
16BIT
17
15 14 13
18
16
–
–
+
+
RO1
SWITCH
AMP
RO2
CONTROL
AMP
VREF
VREF
SUM
AMP
MIC AMP
+
+
–
–
8
9
10 11 12
U11 LP2953IM (HAND MAIN Board)
GND
8
VCC
NC
OUTPUT
7
NC
6
NC
VSS
5
SENSE
SHUT DOWN
1,024 BIT
EEPROM
ARRAY
ERROR
NC
GND
– 30 –
1
2
3
ERROR
AMP
+
–
4
5
+
–
SHUT DOWN
COMPARATOR
DROP OUT
DETECTION AMP
+
6
–
7
8
AUXILLARY
COMPARATOR
16 GND
INPUT
15
FEEDBACK
14
5V TAP
13
12
VREF
1.23V
11
COMP IN
10
COMP OUT
9
GND
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