FreeCalypso > hg > freecalypso-reveng
comparison pirelli/mcsi @ 56:fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
| author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
|---|---|
| date | Sun, 20 Oct 2013 04:49:28 +0000 |
| parents | |
| children |
comparison
equal
deleted
inserted
replaced
| 55:037c9bea954c | 56:fdfb57a1c5fe |
|---|---|
| 1 Tracing all 4 MCSI signals starting from the Calypso | |
| 2 | |
| 3 MCSI_TxD: Calypso ball L10, L1 trace goes to (3829,474). The trace on L2 gets | |
| 4 lost in the edge grind-down damage. | |
| 5 | |
| 6 MCSI_RxD: Calypso ball M10, no visible trace on L1 - perhaps there is a | |
| 7 micro-via under the ball? The ball pad coords are (3841,499). Looking at L2, | |
| 8 the micro-via hypothesis seems to be correct: a trace from those coords goes in | |
| 9 the same bunch as the MCSI_TxD. But then it gets lost in the damage too. | |
| 10 | |
| 11 MCSI_CLK: Calypso ball N10, L1 trace goes to (3898,369). L2: joins the same | |
| 12 bunch with MCSI_TxD and MCSI_RxD, then gets lost in the damage. | |
| 13 | |
| 14 MCSI_FSYNCH: Calypso ball K9, L1 trace goes to (3865,524). L2: same story as | |
| 15 the others. |