DUO/SCDR2 tech data

[thesteve]

i have been pin mapping D91317GD (IC501 in the duo)

heres what i have so far updated 4/16/2014

its the signals between the huc6280 and the expansion mapper(DMA chip)

added ADPCM, SYS card and BUS control logic

Code Select Expand

----------------------------------SYSTEM BUS--------------------------
1 +5
2 IRQ2
3 A20/XCE (NO BUFFER)
4 A19 (NO BUFFER)
5 A18
6 A17
7 A16
8 A15
9 A14
10 A13
11 A12
12 A11
13 A10
14 +5
15 GND
16 A9
17 A8
18 A7
19 A6
20 A5
21 A4
22 A3
23 A2
24 A1
25 A0
26 +5
27 D0
28 D1
29 D2
30 +5
31 GND
32 D3
33 D4
34 D5
35 D6
36 D7
37 /OE SYS CARD RAM &BRAM IC519(6) INPUT FROM HUC6280(62) XRD /OE WORK RAM
38 /WE SYS RAM IC519(3) INPUT XWR HUC6280(63) /WE WORK RAM
39 GND
40 HU CARD CHECK
41 NC
42 NC
43 NC
44 MAIN BUS DATA ENABLE
45 MAIN BUS DATA R/W
------------------------------SYS CARD----------------------
46 SYS CARD ROM /CE
47 SYS CARD RAM0 /CE
48 GND
49 Q501 E
50 SYS CARD RAM1 /CE
51 NC
52 NC
53 NC
54 NC
55 NC
-------------------------------ADPCM------------------------
56 IC509, IC510 PIN17
57 IC509, IC510 PIN15
58 IC509, IC510 PIN3
59 IC509, IC510 PIN2
60 GND
61 +5
62 IC510 PIN1
63 IC510 PIN4
64 IC509 PIN1
65 IC509 PIN4
66 IC509, IC510 PIN10
67 IC509, IC510 PIN6
68 IC509, IC510 PIN7
69 IC509, IC510 PIN8
70 IC509, IC510 PIN11
71 IC509, IC510 PIN12
72 IC509, IC510 PIN13
73 IC509, IC510 PIN14
74 47K PULLUP
75 GND
76 IC509, IC510 PIN16
77 IC509, IC510 PIN5
78 Q307 B (RESET)
79 Q606 B (FADER)
80 Q607 B (FADER)
81 AUDIO MUX CONTROL
82 IC502 PIN14 (CLOCK?)
83 X1
84 X1
85 GND
86 IC502 PIN7
87 IC502 PIN6
88 IC502 PIN5
89 IC502 PIN4
90 +5
91 GND
92 IC502 PIN15
93 IC502 PIN16
-----------------------------CD ROM--------------------------
94 RST
95 GND
96 IC105 PIN46 [SCSI DATA
97 IC105 PIN45 [SCSI DATA
98 IC105 PIN44 [SCSI DATA
99 IC105 PIN43 [SCSI DATA
100 IC105 PIN42 [SCSI DATA
101 IC105 PIN41 [SCSI DATA
102 IC105 PIN39 [SCSI DATA
103 IC105 PIN38 [SCSI DATA
104 NC
105 -> IC103 PIN21
106 <- IC103 RESISTOR PIN22
107 IC105 PIN86 CD DATA (SERIAL)
108 IC105 PIN88
109 IC103 RESISTOR PIN69
110 IC103 PIN24 + IC104 PIN20
111 IC103 RESISTOR PIN77
112 GND
113 IC104 PIN19
114 IC105 RESISTOR PIN57
115 IC105 RESISTOR PIN33
116 IC105 RESISTOR PIN55
117 IC105 RESISTOR PIN35+54
118 IC105 RESISTOR PIN32
119 IC105 RESISTOR PIN56
120 GND


[turbokon]

Good stuff, there is still lot I can learn from you:)

[thesteve]

updated

[thesteve]

COMPLETE

[thesteve]

wayback.datasheetcatalog.com/Samsung/mXtzvxq.pdf

http://www.datasheetcatalog.com/datasheets_pdf/K/S/9/2/KS9210.shtml

the samsung KS910 is a comparable chip to the sony CXD1167Q

[NightWolve]

To help translate from steve to the layman on the usefulness of this work/thread:

If all i do with it is map the pins its helpful for IFU and duo repairs. The pins i mapped may make cdrom attachment possible from the HU card slot, as all pins were present.

Could be useful for mods and custom hardware later as well. I'm simply shedding some light on the black box of undocumented custom chips in the system.

If we understand the hardware, we can duplicate it using newer parts making exact replacements less important. Note that almost every pin was buffered making tracing them out not possible with a meter.

[Keith Courage]

Absolute wizardry

[esteban]

To help translate from steve to the layman on the usefulness of this work/thread:

If all i do with it is map the pins its helpful for IFU and duo repairs. The pins i mapped may make cdrom attachment possible from the HU card slot, as all pins were present.

Could be useful for mods and custom hardware later as well. I'm simply shedding some light on the black box of undocumented custom chips in the system.

If we understand the hardware, we can duplicate it using newer parts making exact replacements less important. Note that almost every pin was buffered making tracing them out not possible with a meter.

Thank you,this is the context I needed.

I know thesteve, and others, have been demystifying the hardware, but I'm too ignorant to to say "Thanks!" In a meaningful way. 

Thanks

[NightWolve]

Thank you, this is the context I needed.

Yeah, it's the result of my many interactions with him. ;) I have tried to serve as a context-provider on his behalf many times. Heh.

He sent me a PM to check out this thread after posting it, so I look at it, see a few technical sentences and immediately wonder, "Um, what's the usefulness here ?? ... You didn't explain it for the average Joe, and even I don't know..." So I replied with, "So, what are the potential possibilities with this info ? What's the usefulness factor ?" and that's what got the response I finally pasted in here.

I wanted to paste it here that day, a month ago, but didn't get around to it. Figured he'd eventually, on his own, expand on the significance of these findings, but nope, he didn't. ;) That's alright, that's our steve, the PCEFX MacGyver (think I found a title for 'im, too).

[esteban]

Oops!

[thesteve]

bump
can we get this stickied in the repair info section
it applies to DUO and SCDR2

[NecroPhile]

Done, but ya might want to change the thread title (original post title) to something more specific.

[Xenogears]

@thesteve - incredible job, assuming you measured Pin by Pin... I already claimed you Jedi-Knight and patience to the light side, it leads. I know, NEC would make you Master of the Council. 

[thesteve]

i measured pin for pin
note the main bus is all buffered
some of the pins were identified partly by how the signal worked