(No.49858)1-25
• Pin function
Pin
No.
Symbol
I/O
Function
1
Vcc
-
3.3V Power supply pin
2
FNI
I
Main-beam amp input pin
3
FPI
I
Main-beam amp input pin
4
TPI
I
Sub-beam amp input pin
5
TNI
I
Sub-beam input pin
6
MDI
I
Monitor photo diode amp input pin
7
LDO
O
Laser diode amp output pin
8
SEL
I
"APC circuit ON/OFF control signal laser diode (LDO) control signal, input or bottom/peak detection frequency
change pin."
9
TEBC
I
"Tracking error balance adjustment signal pin Adjusts TE signal balance by eliminating carrier component from
PWM signal(3-state output, PWM carrier = 88.2kHz) output from TC9490F/FA TEBC pin using RC-LPF and
inputting DC. TEBC input voltage:GND~Vcc"
10
TEN
I
Tracking error signal generation amp negative-phase input pin
11
TEO
O
Tracking error signal generation amp output pin.Combining TEO signal and RFRP signal with TC9490F/FA
configures tracking search system.
12
RFDC
O
RF signal peak detection output pin
13
GVSW
I
AGC/FE/TE amp gain change pin
14
VRO
O
Reference voltage (VRO) output pin *VRO = 1/2 Vcc when Vcc = 3.3V
15
FEO
O
Focus error signal generation amp output pin
16
FEN
I
Focus error signal generation amp negative-phase input pin
Signal amp output pin for track count Combining RFRP signal TEO signal with TC9490F/FA configures tracking
search system.
Signal generation amp input pin for track count
RF signal amplitude adjustment amp output pin
"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 from TC9490F/FA RFGC pin using RC-LPF
and inputting DC.*RFGC input voltage : GND-Vcc"
RF signal amplitude adjustment amp input pin
RF signal generation amp output pin
RF signal generation amp input pin
24
GND
-
GND pin
LDO
SEL
GND
OFF
HIZ
Vcc
ON
ON
Connected to Vcc
through 1k resistor
Control signal output
Control signal output
APC
circuit
Mode
GVSW
GND
HIZ
Vcc
CD-RW
CD-DA
CD-DA
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8
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9
2
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4
2
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8
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5
1
5
1
3
6
7
3
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TEL 13942296513 QQ 376315150 892498299