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3.Pin function
Pin No.
Symbol
1
VCC
2
FNI
3
FPI
4
TPI
5
TNI
6
MDI
7
LDO
8
SEL
9
TEB
10
TEN
11
TEO
12
RFDC
13
GVSW
14
VRO
15
FEO
16
FEN
17
RFRP
18
REIIS
19
RFGO
20
RFGC
21
AGCI
22
RFO
23
RFN
24
GND
I/O
-
3.3V power supply pin
I
Main-beam amp input pin
I
Main-beam amp input pin
I
Sub-beam amp input pin
I
Sub-beam amp input pin
I
Monitor photo diode amp input pin
O
Laser diode amp output pin
I
APC circuit ON/OFF control signal, laser diode (LDO) control signal input
or bottom/peak detection frequency change pin.
APC
SEL
circuit
GND
OFF
Hiz
ON
VCC
ON
I
Tracking error balance adjustment signal input pin
Adjusts TE signal balance by ellminating carrier component from PWM
signal (3-state output,PWM carrier = 88.2kHz) output from TC94A14F/FA
TEBC pin using RC-LPF and inputting DC.
TEBC input voltage:GND~VCC
I
Tracking error signal genaration amp negative-phase input pin
O
Tracking error signal generation amp output pin.
Combining TEO signal RFRP signal with TC94A14F/FA configures tracking
search system.
O
RF signal peak detection output pin
I
AGC/FE/TE amp gain change pin
GVSW
Mode
GND
CD-RW
Hiz
Normal
VCC
O
Reference voltage (VRO) output pin
VRO=1/2VCC When VCC=3.3V
O
Focus error signal generation amp output pin
I
Focus error signal generation amp negative-phase input pin
O
Signal amp output pin for track count
Combining RFRP signal and TEO signal with TC94A14F/FA configures
tracking search system.
I
Signal generation amp input pin for track count
O
RF signal amplitude adjustment amp output pin
I
RF amplitude adjustment control signal input pin
Adjusts RF signal amplitude by eliminating carrier component from PWM
signal (3-state output,PWM carrier=88.2kHz)output fromTC94A14F/14FA
RFGC pin using RC-LPF and inputting DC.
RFGC input voltage:GND~VCC
I
RF signal amplitude adjustment amp input pin
O
RF signal generation amp output pin
I
RF signal generation amp input pin
-
GND pin
Function
LCD
Connected VCC through 1k resistor
Control signal output
Control signal output
KW-XC828
TA2175FN-X
1-49
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