Sharp CD-MPS900 Service Manual download pdf (Page 79)

CD-MPS900/CD-MPS99

8 – 2

IC1 VHiLC78648E-1: CD Servo (LC78648E) (2/2)

In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.

The same potential must be supplied to all power supply pins, i, e., AVDD1, AVDD2, XVDD, DVDD, LVDD and RVDD)

Pin No. Terminal Name Input/Output Setting in Reset Function

44 RCHO Output RVDD /2

Right channel

D/A converter

R channel Power supply pin.

45 RVDD — — R channel output supply pin.

46 XVSS — — Digital GND pin. Must always be connected to 0 V

47 XOUT Output Oscillator

Crystal

oscillator

Power supply for crystal oscillator.

Connected for a 16.9344 MHz crystal oscillator pin.

48 XIN Input Oscillator

49 XVDD — — Digital power supply pin. Must always be connected to 0 V

50 IOMODE Input — CONT4 to 6. MONI3~5, DRF, WRQB pin output mode switching input pin.

”L” setting: Normal output “H” setting: Nch open drain output

51 F16MIN Input — DF. DAC external clock input pin.

52* OUT1 Output L General-purpose output pin 1.

53 16MOUT Output CLK

Output

16.9344 MHz output port.

54 ASLRCK Input —

Anti-shock

Left/Right clock input pin.

(Must be connect to 0 V when unused.)

55 ASDACK Input — Bit clock input pin.

(Must be connect to 0 V when unused.)

56 ASDFIN Input — Left/Right channel data input pin.

(Must be connect to 0 V when unused.)

57 LRSK Output L

Digital data

output

Left/Right channel data output pin.

58 DATACK Output L Bit clock output pin.

59 DATA Output L Left/Right clock output pin.

60 DVDD — — Digital power supply pin.

61 DVSS — — Digital GND pin 2. Must always be connected to 0V.

62 CE Input —

Microcom-

puter Interface

Chip enable signal input pin.

63 CL Input — Data transfer clock input pin.

64 DI Input — Data output pin.

65 DO Output (H) Data output pin. (Try state output.)

66 WRQB Output L Interruption signal output pin.

67 RESB Input — Reset input pin for LSI.

This pin must be set LOW briefly after power is first applied.

68 DRF Output L Focus ON detection pin.

69 C2F/SBCK Input/Output Input Error flag monitor pin, or sub

code read clock input pin.

Controlled by commands from the micropro-

cessor.

70 CONT6/SBCK Input/Output Input General-purpose I/O pin 6, or

sub code read clock input pin.

Controlled by commands from the micropro-

cessor.

Any of these that are unused must be either

set up as input pin ports and connected to 0

V, or set up as output pin ports and left open.

71* MONI5 Output L Internal signal monitor pin 5.

72* MONI4 Output L Internal signal monitor pin 4.

73 MONI3 Output L Internal signal monitor pin 3.

74 CONT5 Input/Output Input General pur-

pose I/O pin 5.

Controlled by command from the microprocessor. Any of

these that are unused must be either set up as input pin ports

and connected to 0 V, or set up as output pin ports and left

open when unused.

75 CONT4 Input/Output Input General pur-

pose I/O pin 4.

76 PDO1 Output —

PLL

Phase comparison output pin 1 to control built-in VCO.

77 PDO2 Output — Phase comparison output pin 2 to control built-in VCO.

78 PCKIST Input — Resistor connection pin to set current for PDO1 and 02 out-

puts.

79 VVSS — — Built-in VCO GND pin. Must always be connected to 0 V.

80 VVDD — — Built-in VCO power supply pin.

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Sharp CD-MPS900 Service Manual Page 79

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