Sharp IM-DR580H(S) Service Manual page 56

IM-DR580H
IC201 VHiLR37820+-1 : Endec/Servo/Atrac (LR37820) (3/3)
Terminal Name
Pin No.
104 DGND
105* SBCK
106* SBO
107* SBSY
108* SFSY
109 VDD5
110 FOK
111 SENSE
112 COUT
113 MCCK
114 DINTX
115 VDD1
116 DGND
117 RSTX
118 SYD0
119-124 SYD1-SYD6
125 SYD7
126 SYWRX
127 SYRDX
128 SYRS
In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.
List of TEST port settings
TEST1 TEST0
H H
H L
L H
L L
Input/Output
—
Schmidt Input/
Three-state Output
Output
Output
Output
Input
Output
Output
Output
Output
Output
Input
—
Schmidt Input
Schmidt Input/
Three-state Output
Schmidt Input/
Three-state Output
Schmidt Input/
Three-state Output
Schmidt Input
Schmidt Input
Schmidt Input
Details
Normal mode
No adjustment mode
Test mode
(Settings prohibited)
Digital GND.
DIN subcode read clock. Expansion port 3.
DIN subcode serial data. Expansion port 2.
DIN subcode block sync signal. Expansion port 0.
DIN subcode frame sync signal. Expansion port 1.
Power supply for interface.
Focus OK detection signal.
Servo status detection signal.
Track cross signal output.
Clock output for microcomputer.
Terminal of interrupt request output to system control interface.
Power supply for interface.
Digital GND.
Chip reset input. L: reset. (Note)
Data bus terminal of system control interface. (LSB)
Data bus terminal of system control interface.
Data bus terminal of system control interface. (MSB)
Register write pulse input of system control interface.
Register read pulse input of system control interface.
Register selection input of system control interface.
List of LDCNT port settings
LDCNT1
H
H
L
L
– 56 –
Function
LDCNT0 Details
H Brake
L Drive UP
H Drive DOWN
L Output OFF