Sharp XL-DK257N - Page 79

XL-DK257N
8 – 6
IC1 VHITC94A70FG2: CD MP3 DECODER (4/4)
Pin Description
* 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.
Pin
No.
Symbol Input / Output Description Default Remarks
88 AGCi Input 3AI/F RF signal AGC amplifier input pin. Input
89 Rfo Output 3AI/F RF signal generation amplifier output pin. Output
90 RVDD3 - Power supply for 3.3V RF amplifier core circuit.
91 LDo Output 3AI/F Laser diode amplifier output pin.
92 MDi Input 3AI/F Monitor photodiode amplifier input pin. Input Reference Voltage=178mVtyp.
93 RVSS3 - Grounding pin for RF amplifier core circuit.
94 FNi2 Input 3AI/F
Main beam signal input pin. To be connected to PIN
diode C.
Input
95 FNi1 Input 3AI/F
Main beam signal input pin. To be connected to PIN
diode A.
Input
96 FPi2 Input 3AI/F
Main beam signal input pin. To be connected to PIN
diode D.
Input
97 FPi1 Input 3AI/F
Main beam signal input pin. To be connected to PIN
diode B.
Input
98 TPi Input 3AI/F
Sub beam signal input pin. To be connected to PIN
diode F.
Input
99 TNPC Output 3AI/F TNI/TPI input common capacitor connection pin. Output Connect to VRO by capacitor.
100 TNi Input 3AI/F
Sub beam signal input pin. To be connected to PIN
diode E.
Input