8. HPM6800EVK

8.1. 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.

8.2. 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

8.3. DIP Switch SW2

• Bit 1 and 2 controls boot mode

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

8.4. Button

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

8.5. Plug-in

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

Connection	Description
J18	Reference voltage

• The eMMC voltage is selected as follows:

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

Note

User should short VCCQ and 1.8V pin for eMMC testing

8.6. Pin Description

• UART0 Pin:

  The UART0 use for debugger console:

  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.

  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.

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

• SPI Pin:

  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:

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

• ADC16 Pin

  Function	Pin	Position
  ADC0.INA8	PE16	J19[15]

• GPTMR Pin

  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

  Function	Position	Standard
  3.5mm headphone	J4	OMTP

• Audio input interface

  Function	Position
  microphone	P1

• DAO interface

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

• Ethernet PPS Pin

  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

  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

  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

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

• CLOCK REF Pin

  Function	Position
  PD31	J20[7]

• ESP-HOSTED Pin

Function	Position	Note
PE11	P2[13]	RESET Pin
PE12	P2[3]	HANDSHAKE Pin
PE13	P2[5]	DATA_READY Pin

• BROWNOUT Interrupt Indicator Pin

Function	Position
PE27	J19[5]

8.7. 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.

    

  • 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.

    

  • Revised Status

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