# HG changeset patch
# User Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
# Date 1385970281 0
# Node ID c20dedad87a01dd34c24b7aaf733e98592be3894
# Parent  2bc45eb8818deb13ceec060cc35749578fcbd5f7
Pirelli PCB RE: got some success with the LCD connector pinout

diff -r 2bc45eb8818d -r c20dedad87a0 pirelli/lcd
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pirelli/lcd	Mon Dec 02 07:44:41 2013 +0000
@@ -0,0 +1,84 @@
+Attempting to learn some of the LCD connector pinout by tracing some signals
+from the SPCA552E - those signals which are suggested by the Nokia schematic
+showing the same chip.
+
+LCD_D0, coming from SPCA ball D1: L8 trace goes to (3779,1826). L7 trace to
+(2404,1833).  Appears to connect to display pin 9 by way of a via in the pad.
+
+LCD_D1, SPCA ball E1: (3802,1816). L7 trace to (2320,1817).
+Connects to display pin 10.
+
+LCD_D2, SPCA ball E2: (3808,1841). L7 trace to (2325,1760).
+Connects to display pin 11.
+
+LCD_D3, SPCA ball E3: (3906,1855). L7 trace passes through (3695,1701), then
+goes to (2325,1703).  The middle tap seems to go to a resistor whose other end
+is a copper fill (GND).  Nokia's schematic has a pull-down resistor on this
+LCD_D3 net as a mode-select for the SPCA552E.  The display end connects to
+pin 12.
+
+LCD_D4, SPCA ball F1: (3791,1774). L7 trace to (2387,1707).
+Appears to connect to display pin 13 by way of a via in the pad.
+
+LCD_D5, SPCA ball F2: (3759,1687). L7 trace to (2483,1551).
+Connects to display pin 14.
+
+LCD_D6, SPCA ball F3: (3744,1664). L7 trace to (2329,1636).
+Connects to display pin 15.
+
+LCD_D7, SPCA ball G1: (3798,1695). L7 trace to (2302,1540).
+Connects to display pin 16.
+
+LCD_D8, SPCA ball G2: (3806,1669).
+LCD_D9, SPCA ball H1: ball at (3839,1680), no visible connection.
+LCD_D10, SPCA ball J1: ball at (3840,1631), no visible connection.
+LCD_D11, SPCA ball H2: ball at (3889,1682), no visible connection.
+LCD_D12, SPCA ball J2: ball at (3888,1631), no visible connection.
+
+The 4 "unconnected" balls above indeed have invisible microvias in the pads,
+visible on L7.  On L7 there is a bundle of 5 traces with LCD_D8 at the bottom
+and LCD_D12 at the top.  Vias back to L8:
+
+LCD_D8: (2571,1409), pin 18
+LCD_D9: (2544,1408), pin 19
+LCD_D10: (2516,1409), pin 20
+LCD_D11: (2515,1380), pin 21
+LCD_D12: (2569,1298), pin 22
+
+LCD_D13, SPCA ball G3: (3790,1506). L7 trace to (2561,1209), pin 23.
+LCD_D14, SPCA ball H3: (3827,1507). L7 trace to (2541,1189), pin 24.
+LCD_D15, SPCA ball J3: (3935,1597). L7 trace to (2522,1165), pin 25.
+
+Display connector pinout:
+
+Pin  1:
+Pin  2:
+Pin  3:
+Pin  4:
+Pin  5:
+Pin  6:
+Pin  7:
+Pin  8:
+Pin  9: D0
+Pin 10: D1
+Pin 11: D2
+Pin 12: D3
+Pin 13: D4
+Pin 14: D5
+Pin 15: D6
+Pin 16: D7
+Pin 17: connects to copper flood, must be GND
+Pin 18: D8
+Pin 19: D9
+Pin 20: D10
+Pin 21: D11
+Pin 22: D12
+Pin 23: D13
+Pin 24: D14
+Pin 25: D15
+Pin 26: fat trace to (2427,1123)
+Pin 27: looks like a possible via-in-pad
+Pin 28: fat trace goes through an exposed test point at (3068,1042), then to
+	via at (3161,1001)
+Pin 29: looks like a possible via-in-pad
+Pin 30: connects to copper flood, must be GND