FreeCalypso > hg > freecalypso-reveng
annotate pirelli/vctcxo @ 212:422d45f48fe6
leo-obj/l1_dyn_dwl: created hints file for async module to get ASCII strings
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
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date | Mon, 28 Mar 2016 07:04:20 +0000 |
parents | ed7318a03e0c |
children | cbd944ebeff0 |
rev | line source |
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195
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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1 Let's trace the TCXOEN signal from the Calypso. Calypso ball A12, no trace |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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2 visible, guessing a micro-via right under the ball. L1 coord (3739,1053). |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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3 Guess appears right: on L2 there is a connection from a micro-via to an inner |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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4 via, the latter is at (3712,1055). Found it on L4: the via is in the middle of |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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5 a trace going both ways! Right branch goes to (4548,1028); left branch goes to |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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6 (1699,1349). |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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7 |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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8 Following the branch at (4548,1028): found it on L2, microvia back to L1 at |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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9 (4518,1048). Found it on L1, goes to some 2-pad footprint, can't tell if it's |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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10 unpopulated or a faint black resistor. The other end goes to a via at |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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11 (4676,919). Found it on L2, goes to inner via at (5135,684). Found it on L7, |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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12 goes to surface via at (5132,716). Found it on L8 - goes to flash RY/BY# ball |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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13 - WTF? |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
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14 |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
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15 Following the branch at (1699,1349): found it on L2, immediately goes back to |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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16 L1 at (1673,1353). Found it on L1, go to UL pad of the VCTCXO, passing by a |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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17 cap to GND. The cap is populated. |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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18 |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
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19 Let's trace the signal from the VCTCXO to the Rita. VCTCXO pin is unknown, but |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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20 the input to Rita corresponds to a surface via at (2161,488) - at this point on |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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21 L1 there is an unpopulated cap(?) to GND and a series component (cap?) to the |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
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22 actual Rita input. Found it on L2, goes back to L1 at (2123,1284). On L1 it |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
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23 falls right into the UR pad of the VCTCXO! Conclusion: the signal from VCTCXO |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
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24 to Rita passes through a single series component, just like in Rita datasheet. |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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changeset
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25 |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
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26 The LR pad of the VCTCXO is GND. Thus the control input must be the LL pad. |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
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27 The input signal to here passes first through a series component, then passes |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
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28 by a comp to ground, and then goes into the VCTCXO input. The entry point to |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
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29 the whole arrangement is a surface via at (1669,1488). Found it on L2, inner |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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30 via at (1655,1467). Found it on L4, goes to (2932,855). Found it on L2, |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
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31 surface via to L1 at (2950,837). That's Iota ball J4 (AFC), and there is also |
ed7318a03e0c
pirelli/vctcxo: VCTCXO connections traced out
Michael Spacefalcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
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32 a branch from there that goes to an unpopulated cap(?) footprint to GND. |