Yamaha MDX-596 Service Manual page 31

IC1401 : iX0324AW
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-596
30