Sharp CD-MP700 Service Manual page 45

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IC3 VHiLC78683E-1: MP3 Decoder (LC78683E) (2/2)
Pin No.
Terminal Name
51
DVDD4
52
VSS
53
ADRS7
54
ADRS6
55
ADRS5
56
ADRS4
57
ADRS3
58
ADRS2
59
ADRS1
60
ADRS0
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
MP3 CL
76
MP3 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.
All manuals and user guides at all-guides.com
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.
– 45 –
CD-MP700/CD-MP77
Function

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