Sharp MD-MT877S Service Manual page 43

IC201 VHiLR378161-1 :Endec/Servo/Atrac (LR378161)
System LSI expansion output port
Port Name Terminal Name Input/Output
Pin No.
56* EXPORT4 Undecided justice
57 EXPORT5 LDCNT1
58 EXPORT6 LDCNT2
59 EXPORT7 EMPH1
78 EXPORT3 HDON
79 EXPORT2 OPTCNT
80 EXPORT0 DAPON
81 EXPORT1 ADPON
In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.
*1: List of TEST port settings
TEST1 TEST0
H H Normal mode
H L No adjustment mode
L H Test mode
L L (Settings prohibited)
Output
Output
Output
Output
Output
Output
Output
Output
*2: List of EMPH port settings
EMPH1
Details
H
H
L
L
Function
Not used
Recording head raising-lowering control output 0.
Recording head raising-lowering control output 1.
Audio emphasis control output 1.
Recording head.
Optical digital input circuit ON/OFF control.
D/A converter operation control output.
A/D converter operation control output.
EMPH0
Details
H fs=32K: 'ON'
L fs=48K: 'ON'
H OFF
L fs=44.1K: 'ON'
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MD-MT877/MD-MT877C
Remarks
Not used
See the separate table *3.
See the separate table *3.
See the separate table *2.
'H': Record electric current
'H': Circuit operation ON
'H': Operation ON
'H': Operation ON
*3: List of LDCNT port settings
LDCNT1
LDCNT2
H H Brake
H L Drive UP
L H Drive DOWN
L L Output OFF
Details