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annotate pirelli/mcsi @ 58:d05b2e790e6b

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Pirelli PCB: some measurements of the debug connector footprint
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Wed, 13 Nov 2013 21:00:30 +0000
parents fdfb57a1c5fe
children
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56
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1 Tracing all 4 MCSI signals starting from the Calypso
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
2
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
3 MCSI_TxD: Calypso ball L10, L1 trace goes to (3829,474). The trace on L2 gets
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
4 lost in the edge grind-down damage.
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
5
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
6 MCSI_RxD: Calypso ball M10, no visible trace on L1 - perhaps there is a
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
7 micro-via under the ball? The ball pad coords are (3841,499). Looking at L2,
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
8 the micro-via hypothesis seems to be correct: a trace from those coords goes in
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
9 the same bunch as the MCSI_TxD. But then it gets lost in the damage too.
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
10
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
11 MCSI_CLK: Calypso ball N10, L1 trace goes to (3898,369). L2: joins the same
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
12 bunch with MCSI_TxD and MCSI_RxD, then gets lost in the damage.
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
13
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
14 MCSI_FSYNCH: Calypso ball K9, L1 trace goes to (3865,524). L2: same story as
fdfb57a1c5fe Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
15 the others.