FreeCalypso > hg > freecalypso-reveng
annotate pirelli/spca @ 349:f2eaa4238bef
fluid-mnf/target-bin: target-side code pieces from original FLUID
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 13 Mar 2020 06:51:38 +0000 |
parents | 8e4dac492552 |
children |
rev | line source |
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54
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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1 Tracing signal from Calypso A1 (address line 1, ball F2); expecting to see it go |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
2 to ball H8 on SPCA552E. On L1 the trace goes to (4326,756). On L2 I see it |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
3 branching - d'oh, it's address line A1, of course it will go to a ton of things! |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
4 Looking for another signal to trace that would be point-to-point from Calypso |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
5 to SPCA552E. |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
6 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
7 Let's try tracing the bypass GPIO signal, presumably originating from GPIO 7 on |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
8 the Calypso. That's Calypso ball N2. L1 goes to (4259,467). L2 takes it to an |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
9 inner via at (4290,471). Found it on L5: goes to another inner via at |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
10 (4370,1835). Found it on L7: goes to (4270,2026). On L8 it arrives at an SPCA |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
11 ball which we are going to assume is A8 (bypass input according to the Nokia |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
12 schematic). |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
13 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
14 Deduced SPCA552E BGA orientation in steve-m's L8 picture: A1 in the LL corner, |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
15 row A along the bottom. |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
16 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
17 Accessible surface test points around the SPCA: |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
18 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
19 * Along the bottom (the side toward the red and # keys) we have TPs for A8 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
20 (bypass input) and C7 (Rxd1). The TP in between these two seems to be connected |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
21 through some inner layer, haven't traced yet. The L8 coordinates of this TP are |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
22 (4221,2119). The hole seems to be slanted to (4228,2112) though. |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
23 On L7 it goes to a large-looking via at (4196,1966). |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
24 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
25 * On the side toward the antenna we have TPs for C2 (LcmCs) and D3 (LcmWr). |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
26 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
27 * On the side toward the USB port we have TPs for J8 (Txd1) and H9 (HstRd_n). |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
28 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
29 * On the side toward the green and * keys we have TPs for G4 (Suspend), |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
30 H5 (Trap), and J7 (LcmVs). |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
31 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
32 The L8 trace from ball H6 (LcmMck) goes in two directions, terminating at via |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
33 points (4066,1704) and (4270,1251). On L7 the leg from (4066,1704) goes to |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
34 (3722,1700), looks like a micro-via back to L8. |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
35 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
36 Tracing Calypso PWL signal, starting with Calypso ball L7. On L1 the trace from |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
37 ball L7 appears to go to (3988,528); the trace from ball K7 (PWT/BU, no other |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
38 functions listed in CAL000) goes to (4041,813). |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
39 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
40 Tracing the mysterious PWT/BU first. On L2 the trace from (4041,813) goes to |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
41 (4211,1018), seems to be a micro-via back to L1. On L1 it goes to some strange |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
42 component pad at (4300,1186). The component seems to be a resistor; the other |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
43 side connection is unclear. |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
44 |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
45 Back to PWL. On L2 the trace from (3988,528) goes to a larger via at |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
46 (4010,554). Found in on L7: goes to a micro-via to L8 at (3975,478). On L8 it |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
47 goes to another via back to L7 at (3784,664). On L7 it goes to a larger via at |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
48 (3635,839). Found it on L5: goes to another via at (3512,1808). Found it on |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
49 L7: goes to a micro-via to L8 at (3459,1756). There it appears to connect to |
8e4dac492552
another Pirelli PCB tracing session, focusing on the display subsystem
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
50 the mysterious A3-90E component through some resistors. |