Sharp Illustration XL-HP535E, Service Manual

Page: 63 / 88

XL-HP535H/HP535E
8 – 7
IC3 VHiLC78683E-1: MP3 Decoder (LC78683E) (2/2)
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
NOTE: 1) Notes on unused pins
Unused input pins must be connected to the ground level (0V).
Unused output pins must be left open. Do not connect anything to these pins.
Unused I/O pins may either be connected to the ground level (0V) or set to output mode and left open.
2) The corresponding power supply levels must be provided to all of the DVDD1, DVDD3, DVDD4, DVDD6, and AVDD pins. The correspond-
ing power supply level must also be provided to DVDD2 and DVDD5. (See the Allowable Operating Ranges specifications for the supply
levels.)
3) The TEST1 and TEST2 input pins must be connected to ground (0V).
4) The I/O pins (MDA0:15, STREQ, STCK, and STDAT) go to input mode after a reset.
5) After fist applying the power supply levels, the RESB pin must be held low for at least 1
µ
s.
6) A 16.9344 MHz clock signal must be supplied to the CKIN pin by the CD DSP.
The LC786484E does not support the implementation of an oscillator circuit using an oscillator element.
Pin No. Terminal Name Input/Output Block Function
51 DVDD4 — Power supply Digital I/O system power supply.
52 VSS — GND
53 MADRS7 Output Memory interface DRAM address output 7.
54 MADRS6 Output DRAM address output 6.
55 MADRS5 Output DRAM address output 5.
56 MADRS4 Output DRAM address output 4.
57 MADRS3 Output DRAM address output 3.
58 MADRS2 Output DRAM address output 2.
59 MADRS1 Output DRAM address output 1.
60 MADRS0 Output DRAM address output 0.
61 DVDD5 — Power supply Internal logic system power supply.
62 VSS — GND
63* STREQ Input/Output MP3 stream I/O MP3 data request flag output.(active high)/DRAM data request flag input.
(CD-ROM mode, active high)
64* STCK Input/Output MP3 data transfer clock input/DRAM data transfer clock output.
65* STDAT Input/Output MP3 serial data input/DRAM serial data output.
66 FSYNC Output MP3-dec MP3 data frame sync signal (active high)/Data continuity point detection
complete flag.(CD-DA mode, active high)
67* CRCF Output CD monitor CRC check result output (CD-ROM data/CD-DA subcode data)/DRAM data
output enable signal output.(active high)
68 DVDD6 — Power supply Digital I/O system power supply.
69 VSS — GND
70* WOK Input CD-DA shock-
proof and MP3 I/O DRAM write enable input (CD-DA mode, active high)/DRAM data request
flag input.
71* CNTOK Output Data continuity point detection complete flag (CD-DA mode, active high)/
SYNC error monitor flag (MP3 mode, active high)/DRAM serial data output.
72* OVF Output DRAM write interrupt flag (CD-DA mode, active high)/Emphasis output flag
(CD-DA and MP3 modes, active high)/DRAM data transfer clock output.
73 CMDOUT Output Microcontroller
interface Serial command data output.(n-channel open-drain output)
74 CMDIN Input Serial command data input.
75 CL Input Serial command clock input.
76 CE Input Command enable input (active high)
77 INTB Output Interrupt signal output (active low)/DRAM write interrupt flag. (CD-DA mode,
active high)
78 RESB Input System reset. (active low)
79 DATAIN Input CD IF Serial CD data input.
80 DATACK Input CD bit clock input.