1. HPM6750EVK

1.1. Overview

The HPM6750 is a dual-core flashless MCU running 816Mhz. It has a 2MB 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.

hpm6750evk

1.2. Hardware

  • HPM6750IVM MCU (816Mhz, 2MB OCRAM)

  • Onboard Memory

    • 256Mb SDRAM

    • 128Mb Quad SPI NOR Flash

  • Display & Camera

    • LCD connector

    • Camera (DVP)

  • Ethernet

    • 1000 Mbits PHY

    • 100 Mbits PHY

  • USB

    • USB type C (USB 2.0 OTG) connector x3

  • Audio

    • Line in

    • Mic

    • Speaker

    • DAO

  • Others

    • TF Slot

    • FT2232

    • Beeper

    • RGB LED

    • CAN

  • Expansion port

    • Motor control

1.3. DIP Switch S1

  • Bit 2 and 3 controls boot mode

bit[2:3]

Description

OFF, OFF

Boot from Quad SPI NOR flash

OFF, ON

Serial boot

ON, OFF

ISP

  • Change the position of bit 1 to select between PWM and Gigabit Ethernet

Bit1

Description

OFF

Gigabit Ethernet

ON

PWM

1.4. Button

Name

FUNCTIONS

PBUTN (S2)

Power Button, TinyUF2 Boot Button, GPIO Button

WBUTN (S3)

WAKE UP Button

RESETN (S4)

Reset Button

1.5. Pin Description

  • PWM Pin:

Function

Position

PWM2.P0

J12[14]

PWM2.P1

J12[13]

image-1

  • SPI Pin：

Function

Position

SPI2.CSN

J20[7]

SPI2.SCLK

J20[8]

SPI2.MISO

J20[9]

SPI2.MOSI

J20[10]

  • I2C Pin：

Function

Position

I2C0.SCL

J20[3]

I2C0.SDA

J20[4]

  • UART for core1 debug console

Function

Position

UART13.TXD

J20[5]

UART13.RXD

J20[6]

  • ACMP Pin

Function

Position

CMP.INN6

J12[8]

CMP.COMP_1

J12[6]

  • GPTMR Pin

Function

Position

Remark

GPTMR4.CAPT_1

J12[6]

GPTMR3.COMP_1

J12[8]

MCLK of i2s emulation

GPTMR5.COMP_2

J12[18]

LRCK of i2s emulation

GPTMR5.COMP_3

J12[16]

BLCK of i2s emulation

  • ADC12 Pin

Function

Position

ADC12 Reference Voltage Setting

N/A

ADC0.VINP11

J12[6]

  • ADC16 Pin

Function

Position

ADC16 Reference Voltage Setting

N/A

ADC3.INA2

J12[5]

  • headphone interface

Function

Position

Standard

3.5mm headphone

J14

CTIA

  • audio input interface

Function

Position

3.5mm LIN_IN

J17

  • DAO interface

Function

Position

Speaker

J18

  • Ethernet PPS Pin

Function

Position

ENET0.EVTO0

U29[2]

  • UART13 pin The UART13 is used for core1 debug console or some functional testing using UART, such as uart_software_rx_idle, uart_rx_timeout, uart_software_lin, MICROROS_UART, USB_CDC_ACM_UART, MODBUS_RTU etc.

Function

Position

Remark

UART13.TXD

J20[5]

UART13.RXD

J20[6]

UART13.break

J20[7]

generate uart break signal

  • TRGMUX pin for uart_software_rx_idle sample

Function

Position

TRGM2_P9(PD19)

J12[20]

Function

Pin

Position

Mode

TAMP.08

PZ08

J20[6]

Active Mode

TAMP.09

PZ09

J20[5]

Active Mode

TAMP.10

PZ10

J20[4]

Passive Mode

  • CS Pin of i2s emulation

Function

Position

Remark

PD25

J12[16]

the pin that controls the SPI slave CS