Sharp MD-SR50HBL Service Manual page 37

IC401 RH-iX0341AWZZ: System Microcomputer (IX0341AW) (3/3)
System LSI expansion output port (6th generation: LR37811)
Terminal Name Input/Output
Pin No. Port Name
52 EXPORT0 LDCNT1
53 EXPORT1 LDCNT2
54 EXPORT2 —
55 EXPORT3 EMPH1
56 EXPORT4 —
57 EXPORT5 OPTCNT
58 EXPORT6 DAPON
59 EXPORT7 ADPON
*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
Recording head raising-lowering control output 1
Recording head raising-lowering control output 2
Not used.
Audio emphasis control output 1
Not used.
Optical digital input circuit 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-SR50H/50W/60E/60W
Remarks
See the separate table *3.
See the separate table *3.
(Open)
See the separate table *2.
(Open)
'H': Circuit operation ON
'H': Operation ON
'H': Operation ON
*3: List of LDCNT port settings
LDCNT1 LDCNT0
H H Brake
H L Drive UP
L H Drive DOWN
L L Output OFF
Details