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Yamaha MDX-E300 Service Manual page 51

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IC1401 : iX0410AW
MD System Microprocessor
No.
Pin Name
1
4M/16M
2
64M
3
LDVAR
4*
ADJS
5
CIN
6*
NC
7
UNLOCK
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
SFSY
20
ST-ID
21
SERCH
22
MDRSW
23*
CDB SEL
24
DSENSE
25
P-DOWN
26
HD ON
27
EEPRO
28
HFON
29
EEPK
30
EEPD
31
MD DATA
32
K DATA
33
DSCK
34
DSTB
35*
NC
36
SBO
37
SBCK
38
DISC
39
R/P
40
FOK
41
FLASH L
42
SGAIN
43
SYRS
44
SYRD
45
SYWR
46
FLASH H
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
O
4M/16M DRAM select input
O
64M DRAM select input
O
LDVAR (Laser power adjustment output)
O
ADJS (for automatic adjustment step check)
I
CIN (Track count signal input)
Unused
I
ERR input (to unlock monitor PLL)
I
GND
I
GND
O
ST-ID output
O
MD search output
I
RESET input
Clock output
GND
I
EXTAL (8.4672MHz)
+3.15V
I
Input/output port P85
I
DINT (interrupt input from MD•LSI)
I
Interrupt input
I
ST-ID input (MD-ON)
I
CD search input (Synchro REC interrupt input)
O
MD RSW output
O
CD BLK SEL output
I
DSENSE (Servo sense input from MD-LSI)
I
P-DOWN (power failure detect)
O
HDON (Magnetic head current ON/OFF output)
O
EEPROM protect cancel output
O
HFON
O
EEPROM serial clock output
I/O
EEPROM data input/output
O
MD data output
I
System computer data input
I
System computer communication clock input
O
DSTB (system computer communication enabled and during communication)
O
Unused
I
Sub-code serial data input
O
Sub-code communication serial clock output
O
DISC
O
R/P output (REC/PLAY select)
I
FOK (focus servo state monitor input)
I
Flash write select
O
SGAIN
O
MD LSI register select signal output
O
SYRD (MD-LSI read signal output)
O
SYWR (MD-LSI write signal output)
I
Flash write select
I/O
SYS D7 (data bus 7)
I/O
SYS D6 (data bus 6)
I/O
SYS D5 (data bus 5)
I/O
SYS D4 (data bus 4)
I/O
SYS D3 (data bus 3)
I/O
SYS D2 (data bus 2)
I/O
SYS D1 (data bus 1)
I/O
SYS D0 (Data bus 0)
Function
MDX-E300
51

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