FreeCalypso > hg > freecalypso-reveng
annotate pirelli/audio @ 167:c25367bb7656
objgrep: written, compiles
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Fri, 04 Jul 2014 00:54:33 +0000 |
parents | 2bec477178fc |
children |
rev | line source |
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55
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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1 Tracing EARN & EARP outputs from Iota. On L1 they go to vias at (2422,518) and |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
2 (2449,518). On L2 they go to vias at (2455,322) and (2492,323). Tracing made |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
3 difficult by flaws in steve-m's grind-down process, but they appear to go to L4, |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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4 where they then seem to go to other vias at (491,1254) and (490,1292). Found |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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5 them on L7: going to immediately adjacent micro-vias at (514,1255) and |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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6 (514,1295). On L8 they go to the earpiece speaker. |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
7 |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
8 Tracing the loudspeaker signal path starting with the physical speaker connector |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
9 on L1. The connector part center is about (1930,212). The connector footprint |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
10 on L1 is damaged by steve-m's grind-down process (almost gone), but there seem |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
11 to be micro-vias at (1756,251) and (2005,237). On L2 they go to (1788,231) and |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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12 (2021,264). On L7 they go to micro-vias at (1784,262) and (1992,252). On L8 |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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13 they go by some caps and then back to new micro-vias! The latter are at |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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14 (1902,220) and (1903,259). On L7 the grind-down damage gets in the way again, |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
15 but they appear to go to vias at (1935,218) and (1934,260). Found them on L3: |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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16 going to new vias at (3703,311) and (3739,313). (It might actually be L4.) |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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17 Found them on L7: fat traces to micro-vias at (3870,934) and (3898,869). |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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18 Finally on L8 they go to the Winbond chip! The speaker connection pins appear |
037c9bea954c
Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
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19 to be the two leftmost ones in the top row of 9 pins. |
56
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
20 |
72
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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21 Winbond chip connections |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
|
22 |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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23 Chip orientation: as viewed in steve-m's depopulated L8 picture, the pinout |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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24 is a L/R flip of the diagram in the datasheet (top and bottom match up, left |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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25 and right flipped). |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
|
26 |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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27 VREF appears to go to a cap to GND like in the reference schem. |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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28 VDD has a fat trace going to a cap; there must be some via(s) to L7 for the |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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29 actual power source, but nothing is visible. Coord range to search: |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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30 x between 3786 and 3975, y between 1205 and 1387. Might be a bump at |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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31 (3880,1380). Probably connects to the "fat finger" trace on L7. |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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32 |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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33 LED output goes to exposed TP, no visible signs of going anywhere else. |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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34 IRQ output goes to exposed TP at (4174,1316), look for it on L7. Couldn't |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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35 find it - maybe it isn't connected after all? Will try programming the |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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36 chip w/o interrupts. |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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37 |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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38 RST input: visible microvia at (4078,1357), found it on L7, goes to (4232,1515), |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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39 looks like a microvia back to L8. Found it on L8: it's an exposed test point |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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40 with the microvia in its centre, and the trace from it goes to SPCA552E ball |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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41 J7! From the Nokia schem, it looks like this SPCA pin is an LCM output that |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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42 can also be repurposed as a GPIO. |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
|
43 |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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44 CS input: visible microvia at (4325,1105) inside an exposed TP. On L7 the long |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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45 trace ends at (1760,1385), looks like a possible microvia back to L8. |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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46 Found it on L8: it connects to a pin on one of the little ICs under the LCD, |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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47 suspected chip select decoder. |
2bec477178fc
Pirelli PCB re: Winbond chip connections
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
56
diff
changeset
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48 |
56
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
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49 Calypso-Iota Voice Band interface |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
50 |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
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51 Tracing the Calypso voice output signal, starting from Calypso ball P14 (VDX). |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
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52 On L1 it goes to a via at (3401,429). On L2 it branches: one end goes to |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
53 (3366,304) - suspected via back to L1 for a test point, and the other end goes |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
54 to (2885,917) - also a suspected via back to L1. Found the 1st branch on L1: |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
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55 it's a short trace to another via at (3291,304). Found the 2nd branch on L1 |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
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56 too: it goes to Iota ball F5 (VDR), matching the Leonardo schematics. |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
57 |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
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58 Now let's trace the branch that went to (3291,304) on L1. On L2 it goes to a |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
59 short trace that goes to (3349,197) - suspected micro-via back to L1. Looking |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
60 on L1: yes, indeed the trace seems to lead back here, but then the edge |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
61 grind-down damage gets in the way. Looking at the L1 populated photo, the |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
62 trace definitely seems to go to an exposed test point. |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
63 |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
64 The apparent lack of a switch or MUX on the Iota digital voice input strongly |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
65 suggests that in Wi-Fi VoIP operation the Calypso DSP acts as a forwarder for |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
66 the digital voice samples, which are being fed to it from the VoIP chip via |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
|
67 another interface: MCSI, or perhaps the otherwise unused MODEM UART switched |
fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
55
diff
changeset
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68 over to DSP ownership. |