Sharp MD-C2 Service Manual page 92

MD-C2
IC1401 RX-iX0276AWZZ:MD System Microcomputer (iX0276AW) (1/2)
Terminal Name Input/Output
Pin No.
1* NC
2 SBCK
3 LDVAR
4* ADIS
5 SFSY
6 LOADIN
7 ERROR
8 BYTE
9 CNVss
10 STID OUT
11 SEACH OUT
12 RESET
13* NC
14 Vss
15 MCCK
16 Vcc
17 P85
18 DINT
19 DSENSE
20 ST-ID
21 SERCH
22 MDRSW
23* FSW
24 CRTRG SW
25 P-DOWN
26 HD ON
27 LD+
28 LD-
29 CIN
30 INNER
31 DATA
32 LATCH
33 CLOCK
34 DSTB
35 MD DATA
36 K DATA
37 DSCK
38 4M/16M
39 R/P
40 FOK
41 PLL SEL
42 S2
43 S1
44 SYRS
45 SYRD
46 SYWR
47 SYS D7
48 SYS D6
49 SYS D5
50 SYS D4
51 SYS D3
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Output Input/output port P96
Output Input/output port P95
Output LDVAR (Laser power output adjustment)
Output ADIS (For automatic adjustment step check)
Output Input/output port P92
Input LD SW CK input (Only for a single unit: Interrupt input)
Input ERR input (The monitor PLL won't lock.)
Input GND
Input GND
Output ST-ID output
Output MD search output
Input RESET input
– Clock output
– GND
Input EXTAL (8.4672MHz)
– +3.15V
Input Input/output port P85
Input DINT (Interrupt input from the MD-LSI)
Input DSENSE (Servo sense input from the MD-LSI)
Input ST-ID input (MD-ON)
Input CD search input (Synchronized REC interrupt input)
Output MD RSW output
Input FSW1 (SW power frequency switch)
Output Cartridge SW. NOD
Input P-DOWN (power failure detection)
Output HDON (Magnetic head current ON/OFF output)
Output LD+ (Loading motor + (positive) control output)
Output LD- (Loading motor - (negative) control output)
Input CIN (Track count signal input)
Input INN SW (Inner SW detection input)
Output R-DATA
Output R-LATCH
Output R-CLK
Output DSTB (System computer communication enable and during communication)
Output MD DATA (MD data output)
Input K DATA (System computer data input)
Input DSCK (System computer communication clock input)
Input 4M/16M DRAM select input
Output R/P output (REC/PLAY switching) PLAY: H
Input FOK (Focus servo state monitor input)
Output Input/output port P55
Output S2 output
Output S1 output
Output SYRS (MD-LSI register select signal output)
Output SYRD (MD-LSI read signal output)
Output SYWR (MD-LSI write signal output)
In/Output SYS D7 (Data bus 7)
In/Output SYS D6 (Data bus 6)
In/Output SYS D5 (Data bus 5)
In/Output SYS D4 (Data bus 4)
In/Output SYS D3 (Data bus 3)
Function
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