.. _hpm6800evk:

HPM6800EVK
==========

Overview
--------

The HPM6800 is a single-core flashless MCU running 600Mhz. It has a 1MB continuous on-chip ram. Also, it provides various memory interfaces, including SDRAM, Quad SPI NOR Flash, SD/eMMC. It integrates rich audio and video interfaces, including LCD, pixel DMA, camera, and I2S audio interfaces.

.. image:: ../../../../boards/hpm6800evk/doc/hpm6800evk.png
   :alt: hpm6800evk
   :align: center

Hardware
--------

- HPM6800 MCU (600MHz, 1MB SRAM)
- Onboard Memory

  - 512MB SDRAM (DDR3L 16bits)
  - 16MB Quad SPI NOR Flash
  - 16GB eMMC

- Display & Camera

  - LCD connector
  - MIPI-DSI
  - MIPI-CSI
  - Camera (DVP)

- Ethernet

  - 1000 Mbits PHY

- USB

  - USB type C (USB 2.0 OTG) connector x1

- Audio

  - Line in
  - Mic
  - DAO

- Others

  - TF Slot
  - RGB LED
  - CAN

DIP Switch SW2
--------------

- Bit 1 and 2 controls boot mode

.. list-table::
   :header-rows: 1

   * - bit[2:1]
     - Description
   * - OFF, OFF
     - Boot from Quad SPI NOR flash
   * - OFF, ON
     - Boot from eMMC
   * - ON, OFF
     - ISP

.. _hpm6800evk_buttons:

Button
------

.. list-table::
   :header-rows: 1

   * - Name
     - FUNCTIONS
   * - USER BUTTON(KEY1)
     - User Button
   * - WBUTN (KEY2)
     - WAKE UP Button
   * - RESETN (SW1)
     - Reset Button

Plug-in
-------

- The ADC/DAC reference voltage is selected as follows:

.. list-table::
   :header-rows: 1

   * - Connection
     - Description
   * - J18
     - Reference voltage

- The eMMC voltage is selected as follows:

.. list-table::
   :header-rows: 1

   * - Connection
     - Description
   * - J6
     - eMMC voltage selection (3.8V / 1.8V)

.. note::

  User should short VCCQ and 1.8V pin for eMMC testing

.. _hpm6800evk_pins:

Pin Description
---------------

- UART0 Pin:

  The UART0 use for debugger console:

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
     * - UART0.TX
       - PA00
       - DEBUGUART0
     * - UART0.RX
       - PA01
       - DEBUGUART0

- UART3 Pin:

  The UART3 is used for some functional testing using UART, such as MICROROS_UART, USB_CDC_ACM_UART, MODBUS_RTU etc.

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
       - Remark
     * - UART3.TX
       - PE15
       - P2[8]
       -
     * - UART3.RX
       - PE14
       - P2[10]
       -
     * - UART3.break
       - PE04
       - P2[24]
       - generate uart break signal

- PUART Pin:

  The PUART is used for low power mode testing, such as wakeup, etc.

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
     * - PUART.TX
       - PY00
       - P2[32]
     * - PUART.RX
       - PY01
       - P2[29]

- SPI Pin:

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
     * - SPI3.CSN
       - PE04
       - P2[24]
     * - SPI3.SCLK
       - PE05
       - P2[23]
     * - SPI3.MISO
       - PE06
       - P2[21]
     * - SPI3.MOSI
       - PE07
       - P2[19]

- I2C Pin:

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
     * - I2C1.SCL
       - PE13
       - P2[5]
     * - I2C1.SDA
       - PE12
       - P2[3]

- ADC16 Pin

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
     * - ADC0.INA8
       - PE16
       - J19[15]

- GPTMR Pin

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
       - Remark
     * - GPTMR2.CAPT_0
       - PE22
       - J19[9]
       -
     * - GPTMR2.COMP_0
       - PE23
       - J19[12]
       - MCLK of i2s emulation
     * - GPTMR2.COMP_1
       - PE24
       - J19[10]
       - LRCK of i2s emulation
     * - GPTMR2.COMP_2
       - PE26
       - J19[8]
       - BLCK of i2s emulation

- Headphone interface

  .. list-table::
     :header-rows: 1

     * - Function
       - Position
       - Standard
     * - 3.5mm headphone
       - J4
       - OMTP

- Audio input interface

  .. list-table::
     :header-rows: 1

     * - Function
       - Position
     * - microphone
       - P1

- DAO interface

  .. list-table::
     :header-rows: 1

     * - Function
       - Position
     * - DAO-SPK(left)
       - J9
     * - DAO-SPK(right)
       - J10

- Ethernet PPS Pin

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
     * - ENET0.EVTO0
       - PD31
       - J20[7]
     * - ENET0.EVTO1
       - PE10
       - P2[11]
     * - ENET0.EVTI0
       - PE17
       - J19[16]
     * - ENET0.EVTI1
       - PE19
       - J19[14]

- CAN Pin

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
       - Output
     * - MCAN3.TXD
       - PD15
       - U25[1]
       - CAN.H J13[3]
     * - MCAN3.RXD
       - PD14
       - U25[4]
       - CAN.L J13[2]
     * - MCAN3.STBY
       - PD13
       - U25[8]
       -

- Tamper Pin

  .. list-table::
     :header-rows: 1

     * - Function
       - Pin
       - Position
       - Mode
     * - TAMP.04
       - PZ04
       - P2[35]
       - Active Mode
     * - TAMP.05
       - PZ05
       - P2[38]
       - Active Mode
     * - TAMP.06
       - PZ06
       - P2[37]
       - Passive Mode

- CS Pin of i2s emulation

  .. list-table::
     :header-rows: 1

     * - Function
       - Position
       - Remark
     * - PE27
       - J19[5]
       - the pin that controls SPI slave CS

- CLOCK REF Pin

  .. list-table::
     :header-rows: 1

     * - Function
       - Position
     * - PD31
       - J20[7]

.. _hpm6800evk_known_issues:

Board Know Issue
----------------------

- USB VBUS pin resistance issue

  - Impact

    - This issue may affect the Host's ability to enumerate USB as a device.

  - Solution

    - Replace the 1kohm resistors R18 with 10ohm resistors.

    .. image:: ../../../../boards/hpm6800evk/doc/hpm6800evk_known_issue_1.png
       :alt: hpm6800evk_known_issue_1

  - Revised Status

    - Not yet revised, `HPM6800EVKRevD` and previous versions have this issue.

- VBAT pin diode issue

  - Impact

    - The voltage rise of the VBAT pin is very slow and can only reach around 2.6V, so the related functions of the battery management domain may not function properly.

  - Solution

    - Replace the D2 diode with a Schottky diode, such as BAT54SWF.

    .. image:: ../../../../boards/hpm6800evk/doc/hpm6800evk_known_issue_2.png
       :alt: hpm6800evk_known_issue_2

  - Revised Status

    - Not yet revised, `HPM6800EVKRevD` and previous versions have this issue.