Sharp XL-DK257N Service Manual page 79

IC1 VHITC94A70FG2: CD MP3 DECODER (4/4)
Pin Description
Pin
Symbol Input / Output
No.
88 AGCi Input 3AI/F
89 Rfo Output 3AI/F
90 RVDD3
91 LDo Output 3AI/F
92 MDi Input 3AI/F
93 RVSS3
94 FNi2 Input 3AI/F
95 FNi1 Input 3AI/F
96 FPi2 Input 3AI/F
97 FPi1 Input 3AI/F
98 TPi Input 3AI/F
99 TNPC Output 3AI/F
100 TNi Input 3AI/F
* 3A I/F : 3 V analog circuit input/output pin.
1.5 I/F : 1.5 V digital input/output pin.
3 I/F : 3 V digital input/output pin.
Note: The servo output pins (FOO, TRO, FMO, and DMO) become undefined or GND level under the following conditions:
• /RST pin = Low
• Crystal oscillation stopped according to the instructions by the Stop crystal oscillation command.
• Power supply for CD is OFF.
• SRAMSTB pin = High
To prevent the undefined pin states from affecting the servo circuitry or any other mechanical blocks in the system,
appropriate measures should be taken, such as using a driver IC supporting a standby feature to place the system in
standby mode while either of the above conditions is satisfied.
RF signal AGC amplifier input pin.
RF signal generation amplifier output pin.
- Power supply for 3.3V RF amplifier core circuit.
Laser diode amplifier output pin.
Monitor photodiode amplifier input pin.
- Grounding pin for RF amplifier core circuit.
Main beam signal input pin. To be connected to PIN
diode C.
Main beam signal input pin. To be connected to PIN
diode A.
Main beam signal input pin. To be connected to PIN
diode D.
Main beam signal input pin. To be connected to PIN
diode B.
Sub beam signal input pin. To be connected to PIN
diode F.
TNI/TPI input common capacitor connection pin.
Sub beam signal input pin. To be connected to PIN
diode E.
Description
8 – 6
XL-DK257N
Default Remarks
Input
Output
Input Reference Voltage=178mVtyp.
Input
Input
Input
Input
Input
Output Connect to VRO by capacitor.
Input