FreeCalypso > hg > freecalypso-reveng
comparison pirelli/lcd @ 62:c20dedad87a0
Pirelli PCB RE: got some success with the LCD connector pinout
| author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
|---|---|
| date | Mon, 02 Dec 2013 07:44:41 +0000 |
| parents | |
| children |
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| 61:2bc45eb8818d | 62:c20dedad87a0 |
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| 1 Attempting to learn some of the LCD connector pinout by tracing some signals | |
| 2 from the SPCA552E - those signals which are suggested by the Nokia schematic | |
| 3 showing the same chip. | |
| 4 | |
| 5 LCD_D0, coming from SPCA ball D1: L8 trace goes to (3779,1826). L7 trace to | |
| 6 (2404,1833). Appears to connect to display pin 9 by way of a via in the pad. | |
| 7 | |
| 8 LCD_D1, SPCA ball E1: (3802,1816). L7 trace to (2320,1817). | |
| 9 Connects to display pin 10. | |
| 10 | |
| 11 LCD_D2, SPCA ball E2: (3808,1841). L7 trace to (2325,1760). | |
| 12 Connects to display pin 11. | |
| 13 | |
| 14 LCD_D3, SPCA ball E3: (3906,1855). L7 trace passes through (3695,1701), then | |
| 15 goes to (2325,1703). The middle tap seems to go to a resistor whose other end | |
| 16 is a copper fill (GND). Nokia's schematic has a pull-down resistor on this | |
| 17 LCD_D3 net as a mode-select for the SPCA552E. The display end connects to | |
| 18 pin 12. | |
| 19 | |
| 20 LCD_D4, SPCA ball F1: (3791,1774). L7 trace to (2387,1707). | |
| 21 Appears to connect to display pin 13 by way of a via in the pad. | |
| 22 | |
| 23 LCD_D5, SPCA ball F2: (3759,1687). L7 trace to (2483,1551). | |
| 24 Connects to display pin 14. | |
| 25 | |
| 26 LCD_D6, SPCA ball F3: (3744,1664). L7 trace to (2329,1636). | |
| 27 Connects to display pin 15. | |
| 28 | |
| 29 LCD_D7, SPCA ball G1: (3798,1695). L7 trace to (2302,1540). | |
| 30 Connects to display pin 16. | |
| 31 | |
| 32 LCD_D8, SPCA ball G2: (3806,1669). | |
| 33 LCD_D9, SPCA ball H1: ball at (3839,1680), no visible connection. | |
| 34 LCD_D10, SPCA ball J1: ball at (3840,1631), no visible connection. | |
| 35 LCD_D11, SPCA ball H2: ball at (3889,1682), no visible connection. | |
| 36 LCD_D12, SPCA ball J2: ball at (3888,1631), no visible connection. | |
| 37 | |
| 38 The 4 "unconnected" balls above indeed have invisible microvias in the pads, | |
| 39 visible on L7. On L7 there is a bundle of 5 traces with LCD_D8 at the bottom | |
| 40 and LCD_D12 at the top. Vias back to L8: | |
| 41 | |
| 42 LCD_D8: (2571,1409), pin 18 | |
| 43 LCD_D9: (2544,1408), pin 19 | |
| 44 LCD_D10: (2516,1409), pin 20 | |
| 45 LCD_D11: (2515,1380), pin 21 | |
| 46 LCD_D12: (2569,1298), pin 22 | |
| 47 | |
| 48 LCD_D13, SPCA ball G3: (3790,1506). L7 trace to (2561,1209), pin 23. | |
| 49 LCD_D14, SPCA ball H3: (3827,1507). L7 trace to (2541,1189), pin 24. | |
| 50 LCD_D15, SPCA ball J3: (3935,1597). L7 trace to (2522,1165), pin 25. | |
| 51 | |
| 52 Display connector pinout: | |
| 53 | |
| 54 Pin 1: | |
| 55 Pin 2: | |
| 56 Pin 3: | |
| 57 Pin 4: | |
| 58 Pin 5: | |
| 59 Pin 6: | |
| 60 Pin 7: | |
| 61 Pin 8: | |
| 62 Pin 9: D0 | |
| 63 Pin 10: D1 | |
| 64 Pin 11: D2 | |
| 65 Pin 12: D3 | |
| 66 Pin 13: D4 | |
| 67 Pin 14: D5 | |
| 68 Pin 15: D6 | |
| 69 Pin 16: D7 | |
| 70 Pin 17: connects to copper flood, must be GND | |
| 71 Pin 18: D8 | |
| 72 Pin 19: D9 | |
| 73 Pin 20: D10 | |
| 74 Pin 21: D11 | |
| 75 Pin 22: D12 | |
| 76 Pin 23: D13 | |
| 77 Pin 24: D14 | |
| 78 Pin 25: D15 | |
| 79 Pin 26: fat trace to (2427,1123) | |
| 80 Pin 27: looks like a possible via-in-pad | |
| 81 Pin 28: fat trace goes through an exposed test point at (3068,1042), then to | |
| 82 via at (3161,1001) | |
| 83 Pin 29: looks like a possible via-in-pad | |
| 84 Pin 30: connects to copper flood, must be GND |