Service manual

57
DV-NC55U/C/M
11-5. IC508 IX1761GE TRACK BUFFER INTERFACE
Pin No. Terminal name I/O Operation function
1 VDD1 Supply Digital power supply +3.3V
2 HADR0 Input CPU Address bus
3 HADR1 Input CPU Address bus
4 HADR2 Input CPU Address bus
5 HADR3 Input CPU Address bus
6 HADR4 Input CPU Address bus
7 HADR5 Input CPU Address bus
8 HADR6 Input CPU Address bus
9 HADR7 Input CPU Address bus
10 VSS Supply Digital GND
11 VDD1 Supply Digital power supply +3.3V
12 HDAT0 In/Output CPU Data bus
13 HDAT1 In/Output CPU Data bus
14 HDAT2 In/Output CPU Data bus
15 HDAT3 In/Output CPU Data bus
16 HDAT4 In/Output CPU Data bus
17 HDAT5 In/Output CPU Data bus
18 HDAT6 In/Output CPU Data bus
19 HDAT7 In/Output CPU Data bus
20 HRD Input CPU Read signal
21 HWR Input CPU write signal
22 HAS Input CPU address strobe
23 HCS1 Input CPU chip select signal 1 (Track Buffer Operation)
24 HCS2 Input CPU chip select signal 2 (bus Voltage Transfer)
25 VSS Supply Digital GND
26 VDD1 Supply Digital power supply +3.3V
27 HWAIT Output CPU wait signal (Open drain)
28 HINT Output CPU interrupt signal (Open drain)
29 VSS Supply Digital GND
30 PDO[0] Output Output DVD/CDdata
31 PDO[1] Output Output DVD/CDdata
32 PDO[2] Output Output DVD/CDdata
33 PDO[3] Output Output DVD/CDdata
34 PDO[4] Output Output DVD/CDdata
35 PDO[5] Output Output DVD/CDdata
36 PDO[6] Output Output DVD/CDdata
37 PDO[7] Output Output DVD/CDdata
38 PDO[8] Output Output DVD/CDdata
39 VSS Supply Digital GND
40 VDD1 Supply Digital power supply +3.3V
41 PSYCO Output Output data selector sync signal
42 PDRQO Output Output data transfer block signal
43 PDCKO Output Output data transfer clock
44 VSS Supply Digital GND
45 VDD2 Supply Digital power supply +5V
46 DVDREQ Input Request signal input
47 PDCKI Input Input data transfer clock
48 PDRQI Input Input data transfer block signal
49 PSYCI Input Input data selector sync signal
50 VSS Supply Digital GND
51 VDD2 Supply Digital power supply +5V