Yamaha MDX-E100 Service Manual page 29

IC1401 : iX0290AW
MD System Microprocessor
No. Pin Name
1* NX
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 VARI-PSW
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
52 SYS D2
53 SYS D1
54 SYS D0
The * marked terminal is a terminal which is not connected externally (open terminal).
I/O
Input/output port P96
O
O Input/output port P95
LDVAR (Laser power adjustment output)
O
ADJS (for automatic adjustment step check)
O
O Input/output port P92
LD SW CK input (interrupt input only when used individually)
I
I ERR input (UNLOCK of monitor PLL)
GND
I
GND
I
O ST-ID output
MD search output
O
I RESET input
Clock output
GND
I EXTAL (8.4672MHz)
+3.15V
I Input/output port P85
DINT (interrupt input from MD•LSI)
I
DSENSE (servo sense input from MD•LSI)
I
I ST-ID input (MD-ON)
CD search input (Synchro REC interrupt input)
I
O MD RSW output
FSW1 (SW for power frequency switching)
I
Corresponding measure to variable pitch, provided (H)/ not provided (L)
O
I P-DOWN (power failure detect)
HDON (Magnetic head current ON/OFF output)
O
O LD+ (Loading motor + control output)
LD- (Loading motor - control output)
O
I CIN (Track count signal input)
I INN SW (Inner SW detect input)
R-DATA
O
O R-LATCH
R-CLK
O
DSTB (System control communication possible and communication being executed)
O
O MD DATA (MD data output)
K DATA (System control data input)
I
I DSCK (System control communication clock input)
4M/16M DRAM select input
I
O R/P output (REC/PLAY switching)
I FOK (Focus servo state monitor input)
Input/output port P55
O
O S2 output
S1 output
O
O SYRS (MD-LSI register select signal output)
SYRD (MD-LSI read signal output)
O
SYWR (MD-LSI write signal output)
O
I/O SYS D7 (Data bus 7)
SYS D6 (Data bus 6)
I/O
SYS D5 (Data bus 5)
I/O
I/O SYS D4 (Data bus 4)
SYS D3 (Data bus 3)
I/O
I/O SYS D2 (Data bus 2)
SYS D1 (Data bus 1)
I/O
I/O SYS D0 (Data bus 0)
Function
MDX-E100
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