Display
=======

.. _qs-lcdcontrol:

Backlight and Display Control
-----------------------------

+---------+------------+----------+---------+---------------------------------+
| **Pin** | **Signal** | **type** | **I/O** | **Description**                 |
+---------+------------+----------+---------+---------------------------------+
| 77      | DISPEN     | 3V3      | O       | Display Enable                  |
+---------+------------+----------+---------+---------------------------------+
| 78      | DISPBL     | 3V3      | O       | Display Backlight Control (PWM) |
+---------+------------+----------+---------+---------------------------------+

.. _qs-lcdrgb:
   
18-bit RGB Display Interface
----------------------------

.. note:: Only available on QSMP
   
.. figure:: ../images/qs-pinout-lcd.png
   :width: 50%
   :figwidth: 50%
   :align: right
   :alt:

+---------+------------+----------+---------+---------------------------------+
| **Pin** | **Signal** | **type** | **I/O** | **Remarks**                     |
+---------+------------+----------+---------+---------------------------------+
| 53      | LCD_DE     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 54      | LCD_VSYNC  | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 55      | LCD_HSYNC  | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 56      | LCD_PCLK   | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 57      | LCD_R1     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 58      | LCD_R2     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 59      | LCD_R3     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 60      | LCD_R4     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 61      | LCD_R5     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 62      | LCD_R6     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 63      | LCD_R7     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 64      | LCD_G2     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 65      | LCD_G3     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 66      | LCD_G4     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 67      | LCD_G5     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 68      | LCD_G6     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 69      | LCD_G7     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 70      | LCD_B1     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 71      | LCD_B2     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 72      | LCD_B3     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 73      | LCD_B4     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 74      | LCD_B5     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 75      | LCD_B6     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+
| 76      | LCD_B7     | 3V3      | O       |                                 |
+---------+------------+----------+---------+---------------------------------+

.. _qs-dsi:

MIPI DSI Display
----------------

+---------+------------+---------------------------------+
| **Pin** | **Signal** | **Remarks**                     |
+---------+------------+---------------------------------+
| 79      | DSI_D3P    | Not available on QSMP,          |
+---------+------------+ which only supports 2 lanes     +
| 80      | DSI_D3N    |                                 |
+---------+------------+ Only 2 lanes available on QSRZ  +
| 81      | DSI_D2P    |                                 |
+---------+------------+                                 +
| 82      | DSI_D2N    |                                 |
+---------+------------+---------------------------------+
| 83      | DSI_D1P    |                                 |
+---------+------------+---------------------------------+
| 84      | DSI_D1N    |                                 |
+---------+------------+---------------------------------+
| 85      | DSI_D0P    |                                 |
+---------+------------+---------------------------------+
| 86      | DSI_D0N    |                                 |
+---------+------------+---------------------------------+
| 87      | DSI_CKP    |                                 |
+---------+------------+---------------------------------+
| 88      | DSI_CKN    |                                 |
+---------+------------+---------------------------------+

.. rubric:: MIPI-DSI Design Recommendations

+-------------------------------------------------------+---------+---------+---------+
| **Parameter**                                         | **MIN** | **TYP** | **MAX** |
+-------------------------------------------------------+---------+---------+---------+
| Operating Speed                                       |         |         |  1.5 GHz|
+-------------------------------------------------------+---------+---------+---------+
| Signal Trace Length                                   |         |         |  250 mm |      
+-------------------------------------------------------+---------+---------+---------+
| Differential Pair Skew                                |         |         |  1 ps   |
+-------------------------------------------------------+---------+---------+---------+
| Lane Skew                                             |         |         |  10 ps  |     
+-------------------------------------------------------+---------+---------+---------+
| Differential Trace Impedance                          |  85 Ω   |   100 Ω |  115 Ω  |
+-------------------------------------------------------+---------+---------+---------+
| Single-ended Trace Impedance                          |         |   50 Ω  |         |
+-------------------------------------------------------+---------+---------+---------+

.. _qs-lvds:

LVDS Display
-------------

+---------+------------+
| **Pin** | **Signal** |
+---------+------------+
| 79      | LVDS_D3P   |
+---------+------------+
| 80      | LVDS_D3N   |
+---------+------------+
| 81      | LVDS_D2P   |
+---------+------------+
| 82      | LVDS_D2N   |
+---------+------------+
| 83      | LVDS_D1P   |
+---------+------------+
| 84      | LVDS_D1N   |
+---------+------------+
| 85      | LVDS_D0P   |
+---------+------------+
| 86      | LVDS_D0N   |
+---------+------------+
| 87      | LVDS_CKP   |
+---------+------------+
| 88      | LVDS_CKN   |
+---------+------------+

.. rubric:: LVDS Design Recommendations

+-------------------------------------------------------+---------+---------+---------+
| **Parameter**                                         | **MIN** | **TYP** | **MAX** |
+-------------------------------------------------------+---------+---------+---------+
| Operating Speed                                       |         |         | 800 MHz |
+-------------------------------------------------------+---------+---------+---------+
| Signal Trace Length                                   |         |         |  250 mm |      
+-------------------------------------------------------+---------+---------+---------+
| Differential Pair Skew                                |         |         |  1 ps   |
+-------------------------------------------------------+---------+---------+---------+
| Lane Skew                                             |         |         |  10 ps  |     
+-------------------------------------------------------+---------+---------+---------+
| Differential Trace Impedance                          |  85 Ω   |   100 Ω |  115 Ω  |
+-------------------------------------------------------+---------+---------+---------+
| Single-ended Trace Impedance                          |         |   50 Ω  |         |
+-------------------------------------------------------+---------+---------+---------+

.. include:: index.rst