Sharp CD-XP700 Service Manual page 50

CD-XP700/CD-XP7700
IC3 VHiLC78683E-1: MP3 Decoder (LC78683E) (2/2)
Pin No. Terminal Name
51 DVDD4
52 VSS
53 MADRS7
54 MADRS6
55 MADRS5
56 MADRS4
57 MADRS3
58 MADRS2
59 MADRS1
60 MADRS0
61 DVDD5
62 VSS
63* STREQ
64* STCK
65* STDAT
66 FSYNC
67* CRCF
68 DVDD6
69 VSS
70* WOK
71* CNTOK
72* OVF
73 CMDOUT
74 CMDIN
75 CL
76 CE
77 INTB
78 RESB
79 DATAIN
80 DATACK
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
*1: Unused port
Unused input pin must always be connected to GND (0 V).
Unused output pin must be left open.
Unused I/O pin must either be connected to GND (0 V) or set to the output and left open.
*2: Be sure to supply the same potential to DVDD1, DVDD3, DVDD4, DVDD6 and AVDD.
Power supply to DVDD2 and DVDD5 must always be lower than that for DVDD1.
*3: Be sure to connect input pins TEST1 and TEST2 to GND (0 V).
*4: I/O pins (MDATA0 to 15, STREQ, STCK, STDAT) are in the input mode during initialization.
*5: At power ON, be sure to set the RESB pin to "L" (1 µs or more).
*6: It is necessary to supply to the CKIN pin the 16.9344 MHz clock from LSI for CD-DSP.
The oscillator circuit cannot be made up from this LSI and oscillator only.
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Input/Output
Input I/O digital supply pin.
— GND ground pin.
Output DRAM address output 7.
Output DRAM address output 6.
Output DRAM address output 5.
Output DRAM address output 4.
Output DRAM address output 3.
Output DRAM address output 2.
Output DRAM address output 1.
Output DRAM address output 0.
Input Internal logic supply pin.
— GND ground pin.
Input/Output MP3 data demand flag output. (H-active)/DRAM data demand flag input. (H-active)
Input/Output MP3 data transfer clock input./DRAM data transfer clock output.
Input/Output MP3 data serial input./DRAM data serial output.
Output MP3 frame synchronization signal. (H-active)
Output CDROM-CRC flag output. (H-active)/DRAM data output enable signal output. (H-active)
Input I/O digital supply pin.
— GND ground pin.
Input DRAM write permit input. (CD-DA, H-active)/DRAM data demand flag input.
(CDROM, H-active)
Output Data connection point detection completion flag. (CD-DA, H-active)/DRAM data serial
output. (CDROM, H-active)
Output DRAM write interrupt flag. (CD-DA, H-active)/DRAM data transfer clock output.
(CDROM, H-active)
Output Command serial data output. (Nch open drain output pin)
Input Command serial data input.
Input Command serial clock input.
Input Command enable input. (H-active)
Output Interrupt signal output. (L-active)
Input System reset. (L-active)
Input CD serial data input.
Input CD bit clock input.
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Function