tc94a23f TOSHIBA Semiconductor CORPORATION, tc94a23f Datasheet - Page 11

• Manufacturer Part Number: tc94a23f
• Description: Single-chip Cd Processor With Built-in Controller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Number
Pin
69
70
71
72
73
74
77
80
78
79
Symbol
2V
RFGC
TEBC
XV
XV
DMO
FMO
SEL
XO
XI
REF
DD
SS
CD processor control
CD processor crystal
oscillator pins
input/output
Pin Name
Control signal output pin for adjusting RF
amplitude.
Outputs three-level PWM signal
(PWM carrier = 88.2 kHz).
Tracking balance control signal output pin.
Outputs three-level PWM signal
(PWM carrier = 88.2 kHz).
Focus equalizer output pin.
Outputs three-level PWM signal
(PWM carrier = 88.2 kHz).
Disc equalizer output pin.
Outputs three-level PWM signal
(PWM carrier = 88.2 kHz for DSP block).
Analog reference voltage power supply pin
(2 ´ V
APC circuit on/off signal output pin.
At laser on, high impedance at UHS = High; H
level output at UHS = High.
Power supply pins for CD crystal oscillator.
To control the CD processor power supply
and the controller power supply individually,
connect the MV
power supply lines used by the V
pins.
CD crystal oscillator input/output pins.
After system reset, this clock is supplied as
the controller system clock and starts the
CPU.
The crystal oscillator can be halted by
program. If the 4.5 MHz or 75 kHz oscillator is
selected as the controller system clock, the
oscillator is halted by program when the CD
processor is off.
(Note)
Connect a 16.9344 MHz crystal oscillator. The
During execution of the CKSTP instruction,
clock is used as the CD system clock and
REF
When switching the controller
system clock from the controller
oscillator to the CD crystal oscillator,
make sure that the CD crystal
oscillator is in stable state.
)
Function and Operation
controller system clock.
11
oscillation halts.
DD
and MV
SS
pins to the
DD
and V
SS
XO
XI
Remarks
R
out3
V
P2V
¾
¾
REF
TC94A23F
R
R
XV
2002-02-06
fXT1
out1
REF
DD
XV
V
DD
SS