AcSiP EK-AI7931LD Manual de usuario

Version E

Doc No 912-13802

Date 2022/11/14

AcSiP Technology Corp

www.acsip.com.tw

EK-AI7931LD

User Guide

Provided by AcSip

Product Name

EK-AI7931LD

Version

Doc No

912-13802

Date

2022/11/14

Page

1 / 26

PRODUCT USER GUIDE

www.acsip.com.tw

Document History

Date Revised Contents Revised By Version

2022/04/29

2022/08/25

2022/09/26

2022/10/20

2022/11/14

Initial Version

Add FCC Statement

Modify Hardware Features

Add EVK Schematic

Modify Hardware Features

Ivan

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Date

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INDEX

1. Introduction ......................................................................................4

1.1. General Description.........................................................................................................4

2. Get started with the HDK...................................................................5

2.1. Configuring the EK-AI7931LD...........................................................................................5

2.2. Installing the FTDI drivers on Microsoft Windows .........................................................6

3. Hardware Features ............................................................................8

3.1. Features Description.......................................................................................................8

4. Hardware Feature Configuration......................................................10

4.1. Microcontroller..............................................................................................................10

4.2. Power Supply ................................................................................................................10

4.3. Audio .............................................................................................................................13

4.4. Buttons ..........................................................................................................................14

4.5. RGB LED .........................................................................................................................14

4.6. SD Card ..........................................................................................................................15

4.7. Extension connectors.....................................................................................................16

5. Federal Communication Commission Interference Statement ..........24

6. EVK Schematic .................................................................................26

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Lists of Tables and Figures

Table 1 Jumper settings for system power input through USB connection.............................11

Table 2 Audio related function .................................................................................................13

Table 3 Buttons .........................................................................................................................14

Table 4 GPIO pin-out extension connector...............................................................................17

Table 5 GPIO pin multi-function definition ..............................................................................18

Figure 1. Front view of EK-AI7931LD ..........................................................................................4

Figure 2. Jumpers and connectors on the EK-AI7931LD ............................................................5

Figure 3. COM port associated with the EK-AI7931LD...............................................................7

Figure 4. Default power jumper plot ........................................................................................10

Figure 5. Power up the HDK using an AA or AAA Battery (J25) ..............................................12

Figure 6. Audio related function...............................................................................................13

Figure 7. RGB LED......................................................................................................................14

Figure 8. SD card slot rework....................................................................................................15

Figure 9. GPIO pin-out extension connectors...........................................................................16

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1. Introduction

1.1.

General Description

AI7931LD is a highly integrated IoT module that features an ARM® Cortex-M33 application processor, a

low power 1x1 802.11a/b/g/n/ac/ax dual-band Wi-Fi subsystem, a Bluetooth v5.0 subsystem and a

Power Management Unit (PMU).

The Wi-Fi subsystem and a Bluetooth v5.0 subsystem offer

feature-rich wireless connectivity at high standards, and deliver reliable, cost-effective throughput

from an extended distance. The AI7931LD is designed to support standard based features in the

areas of security, quality of service and international regulations, giving end users the greatest

performance any time and in any circumstance.

The AI7931LD is based on ARM® Cortex-M33 with floating point microcontroller (MCU) including

SRAM/ROM memory. The module also supports rich peripheral interfaces, including SDIO, SPI master, I2C,

I2S_IN, IR input, UART, AUXADC, PWM, and GPIOs.

These features are used to download and debug a project on EK-AI7931LD.

The front view of the EK-AI7931LD including AI7931LD module is shown in Figure 1.

Figure 1. Front view of EK-AI7931LD

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2. Get started with the HDK

Before commencing the application development, you need to configure the development platform.

2.1.

Configuring the EK-AI7931LD

The top view of the EK-AI7931LD is shown in Figure 2

Figure 2. Jumpers and connectors on the EK-AI7931LD

The description of pins (Figure 2) and their functionality is provided below:

CON8 transfer USB interface to UART interface, can debug through UART, transmit, and receive a

signal form PC.

CON8 is a USB 5V power for EK-AI7931LD, or you can use external 5V power at J1.

Press SW1 to reset the system For SW2~SW5 more detail, please see “section 4.4”.

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For Wi-Fi and BT function AI7931LD module reserve a Wi-Fi + BT IPEX connector. Please connect

external antenna to transmit and receive RF signals.

U8 and U9 are on-board AMICs which can catch voice command.

U54/U56 are RGB LEDs and these RGB LED will be controlled by SPIM interface.

J28 and J87 support multifunction GPIO interface, for more detail please refer to “section 4.7”.

J10 and J11 are audio speaker pin header which can connect 8ohm/2W speaker to achieve voice

assistant function.

2.2.

Installing the FTDI drivers on Microsoft Windows

To configure the EK-AI7931LD:

Connect the EK-AI7931LD CON8 to the computer using a micro-USB cable.

Check your PC is x86 or x64 system. And download and install FTDI Windows serial port driver from

Here. (The red block showed the download file at below figure)

If your OS is Windows7 or 10, please open Windows Control Panel then click System and enter

Device Manager.

In Device Manager, navigate to Ports (COM & LPT) (see Figure 3).

A new COM device should appear under Ports (COM & LPT) in Device Manager, as shown in Figure 3.

Note the COMx port number of the serial communication port, this information is needed to send

command and receive logs from the COM port.

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Due to the com port numbers (COMx) are different at different PC. As red block in Figure 3. showed,

means “CM33 UART”.

Figure 3. COM port associated with the EK-AI7931LD

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3. Hardware Features

This section provides the main supported features of the EK-AI7931LD The detailed description of the

features is provided in the upcoming sections

3.1.

Features Description

3.1.1.

Technology and Package

•AI7931LD LGA-104 module, 32mm X 32mm X 2.7mm (Typ.)

3.1.2.

Power Management and Clock Source

•Integrates high efficiency power management unit with single 3.3V power supply input.

•Integrates 26MHz crystal clock with low power operation in idle mode.

•Integrates 32KHz crystal oscillator for low power sleep mode.

3.1.3.

Platform

•ARM® Cortex-M33 MCU with FPU with up to 300MHz clock speed

•Embedded 1MB SRAM and 4MB PSRAM

•Embedded 16MB serial flash with eXecute In Place (XIP) and on-the-fly AES

•Supports Hardware crypto engines including AES, DES/3DES, SHA, ECC, TRNG for network

security

•Supports up to 22 General Purpose IOs, which are multiplexed with SDIO, SPI Master, UART, I2C,

I2S_IN, AUXADC, PWM and GPIO interfaces

•Supports 12 DMA channels.

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3.1.4.

Wi-Fi

•IEEE 802.11 1T1R a/b/g/n/ac/ax 5GHz and 2.4GHz bands

•Supports 1x1 20MHz bandwidth, MCS0~8(256-QAM) in 2.4G/5GHz band

•Support uplink MU-OFDMA TX and downlink MU-OFDMA RX

•Support TX LDPC (Low-density parity check)

•Support RX STBC

•Wi-Fi security WFA WPA/WPA2/WPA3 personal

•QOS supports of WFA WMM

•Support CSI (Channel Signal Information)

3.1.5.

Bluetooth

•BT5.0 2M_PHY / Long Range / Advertising Extension / SAM / CS#2 / High Duty Cycle

Non-Connectable ADV

•BT4.2 Link Layer Privacy / LE Secure Connection / LE Data Packet Length Extension / Link Layer

Extended Scanner Filter Policies

•BT4.1 Link Layer Topology / Secure Connection

•BT4.0 BLE only mode

•Up to 8 BLE links

•Packet loss concealment

•Channel quality driven data rate adaptation

•Channel assessment and WB RSSI for AFH

•Supports Bluetooth/Wi-Fi coexistence

3.1.6.

Miscellaneous

•Embedded eFuse to store specific device information and RF calibration data.

•Advanced TDD mode Wi-Fi/Bluetooth coexistence scheme.

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