Sharp CD-MPX870W, Service Manual

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CD-MPX870W
8 – 2
IC1 VHiLC78690E-1: CD Servo (LC78690E) (2/2)
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Pin No. Terminal Name Input/Output Setting in Reset Function
51 CONT1 Input/Output INPUT General Purpose I/O pin 1 Controlled by command from the microproces-
sor. Any of these that are unused must be
either set up as input pin ports and connected
to 0V, or set up as output pin ports and left
open.
52 CONT0 Input/Output INPUT General Purpose I/O pin 0
53 TEST0 Input L Test input pin 1. This pin must always be connected to 0V.
54 STREQ Input/Output INPUT Stream data request output pin.
55 STCK Input/Output INPUT Stream data bit clock usage input pin.
56 STDATA Input/Output INPUT Stream data input pin.
57 TEST1 Input L Test input pin 0. This pin must always be connected to 0V.
58* DATA Output L Left/Right clock output pin.
59* DATACK Output L Bit clock output pin.
60* LRSY Output L Left/Right channel data output pin.
61 VVDD2 — — For use by
the EFM
PLL Circuit Built-in VCO power supply pin 2.
62 VPREF2 Input INPUT Built-in VCO control oscillator range setting input pin.
63 VCOC2 Input INPUT Built-in VCO control voltage setting input pin.
64 VPDOUT2 Output UNSTABLE Built-in VCO control output pin 2.
65 VVSS2 — — Built-in VCO GND pin. This pin must always be connected to
0V.
66 DVDD1.8 Output H Supply voltage connect to condenser for digital circuit.
67 DVSS — — Digital GND pin. This pin must always be connected to 0V.
68 DVDD — — Digital power supply pin.
69* DOUT Output Input Digital output pin. EIAJ format.
70* AMUTEB Output L GAMUTEB output pin.
71 XVSS — — Digital GND pin. This pin must always be connected to 0V.
72 XOUT Output OSCILLATING Crystal
oscillator Connections for a 16.9344 MHZ oscillator element.
73 XIN Input OSCILLATING
74 XVDD — — Digital power supply pin.
75 LCHO Output LRVDD/2 D/A con-
verter Left channel output supply pin.
76 LRVDD — — LR channel power supply pin.
77 LRVSS — — LR channel GND pin. This pin must always be connected to
0V.
78 RCHO Output LRVDD/2 Right channel input supply pin.
79 AVDD — — Analog power supply pin.
80 SLCO — — Slice level control output pin.