FreeCalypso > hg > freecalypso-reveng
comparison pirelli/serial @ 56:fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
| author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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| date | Sun, 20 Oct 2013 04:49:28 +0000 |
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| children |
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| 55:037c9bea954c | 56:fdfb57a1c5fe |
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| 1 Tracing the apparently-unused MODEM UART signals | |
| 2 | |
| 3 TxD from Calypso: ball B9, L1 trace goes to (3905,1100). Found it on L2, goes | |
| 4 to an inner via at (3914,1070). Found the inner via on L7, goes to (3182,1071). | |
| 5 On L8 the signal goes directly to the debug connector identified by steve-m. | |
| 6 | |
| 7 RxD to Calypso: ball A9, seems to have a micro-via under the ball, pad coords | |
| 8 (3888,1054). Found it on L2, goes to an inner via at (3911,1030) and also to | |
| 9 what looks like a via back to L1 at (3858,1228). The stub back to L1 appears | |
| 10 to be a pull-up resistor. Found the inner via on L7, goes to (3154,928). | |
| 11 On L8 the signal goes directly to the debug connector identified by steve-m. |