FreeCalypso > hg > freecalypso-reveng

annotate pirelli/undersim @ 72:2bec477178fc

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Pirelli PCB re: Winbond chip connections
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Tue, 25 Mar 2014 08:51:32 +0000
parents 7a84f9e42a84
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
9
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1 There are 4 test points accessible from the battery compartment under the
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
2 SIM card slot. I shall number them as follows:
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
3
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
4 B
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
5 A (battery connector)
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
6 T
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
7
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
8 +-----+
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
9 | |
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
10 | SIM |
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
11 | |
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
12 +-----+
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
13 1 2 3 4
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
14
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
15 i.e., the test point closest to the headset jack shall be numbered 4.
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
16
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
17 TP 1 and TP 2 have tiny vias inside the TP pads themselves; these vias
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
18 appear to go no deeper than L2.
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
19
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
20 TP 1: on L2 it crosses over the tiny via coming from L1 to a larger via
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
21 that penetrates almost the entire layer stack. On L7 the latter via
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
22 connects to a trace. The latter trace runs at normal signal thickness
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
23 until it hits yet another via. On the other side of that via, still on
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
24 the same L7, there is a dead-end arm of what appears to be the same net,
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
25 and the latter arm is thick - almost as if it acts as an antenna of
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
26 some kind. From there the connections are unclear, but it appears to
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
27 connect a bunch of fat traces and possibly even copper fill on other
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
28 layers, so it's unlikely to be an interesting signal.
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
29
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
30 TP 2: on L2 it goes to a trace, that trace goes to another via at image
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
31 coords (4378,1746).
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
32
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
33 TP 3 connects to a via; that via appears to make a solid connection to
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
34 the copper flood-fill on L6.
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
35
7a84f9e42a84 Pirelli PCB: failed attempt at tracing out the 4 under-SIM test points
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
36 TP 4 is connected to the L1 GND copper fill with thermals.