FreeCalypso > hg > freecalypso-reveng
annotate pirelli/serial @ 408:14302e075f37 default tip
hr-bits: further conditionalize SID-1-diff
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Mon, 22 Jul 2024 10:06:38 +0000 |
parents | fdfb57a1c5fe |
children |
rev | line source |
---|---|
56
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1 Tracing the apparently-unused MODEM UART signals |
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 TxD from Calypso: ball B9, L1 trace goes to (3905,1100). Found it on L2, goes |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
4 to an inner via at (3914,1070). Found the inner via on L7, goes to (3182,1071). |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
5 On L8 the signal goes directly to the debug connector identified by steve-m. |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
6 |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
7 RxD to Calypso: ball A9, seems to have a micro-via under the ball, pad coords |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
8 (3888,1054). Found it on L2, goes to an inner via at (3911,1030) and also to |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
9 what looks like a via back to L1 at (3858,1228). The stub back to L1 appears |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
10 to be a pull-up resistor. Found the inner via on L7, goes to (3154,928). |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
11 On L8 the signal goes directly to the debug connector identified by steve-m. |