TC94A14F Datasheet, PDF (4/17 Pages) Toshiba Semiconductor – Digital Servo Single-Chip Processor for Use in CD Player

Pin No. Symbol
26
RFCT
27
RFZI
28
RFRP
29
FEI
30
SBAD
31
TEI
32
TEZI
33
FOO
34
TRO
35
V_REF
36
RFGC
37
TEBC
38
SEL
39
AV_DD3
40
FMO
41
DMO
42
V_SS3
43
V_DD3
44
TESIN
45
XV_SS3
46
XI
47
XO
48
XV_DD3
49
DV_SS3
50
RO
51
DV_DD3
52
DVR
53
LO
54
DV_SS3
I/O
Function Description
I
AI/F
RFRP signal center level input pin.
I
AI/F
RFRP signal zero-cross input pin.
I
AI/F
RF ripple signal input pin.
I
AI/F
Focus error signal input pin.
I
AI/F
Sub-beam adder signal input pin.
I
AI/F
Tracking error input pin. Inputs when tracking servo is on.
I
AI/F
Tracking error signal zero-cross input pin.
O
AI/F
Focus equalizer output pin.
O
AI/F
Tracking equalizer output pin.
¾ Analog reference power supply voltage pin.
O
AI/F
RF amplitude adjustment control signal output pin.
O
AI/F
Tracking balance control signal output pin.
O APC circuit ON/OFF signal output pin. At laser on, high
AI/F impedance with UHS = “L”, H output with UHS = “H”.
¾ Analog 3.3 V power supply voltage pin.
O
AI/F
Feed equalizer output pin.
O
AI/F
Disc equalizer output pin.
¾ Digital GND pin.
¾ Digital 3.3 V power supply voltage pin.
I
3I/F
Test input pin. Normally, fixed to “L”.
¾ System clock oscillator GND pin.
I
AI/F
System clock oscillator input pin.
O
AI/F
System clock oscillator output pin.
¾ System clock oscillator 3.3 V power supply voltage pin.
¾ DA converter GND pin.
O
AI/F
R-channel data forward output pin.
¾ DA converter 3.3 V power supply pin.
¾ Reference voltage pin.
O
AI/F
L-channel data forward output pin.
¾ DA converter GND pin.
4
TC94A14F/FA/FB
Remarks
Analog input: Zin = 33 kW
Analog input
Analog input
Analog input
Analog input
Analog input
Analog input: Zin = 10 kW
Analog output
(AV_SS3~AV_DD3)
¾
3-state output
(PWM carrier = 88.2 kHz)
(AV_DD3, V_REF, AV_SS3)
3-state output
¾
3-state output
(PWM carrier = 88.2 kHz)
(AV_DD3, V_REF, AV_SS3)
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
2002-11-18