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Product Name 

EK-AI7931HD

 

Version 

Doc No 

912-13302 

Date 

2021/12/07 

Page 

16 / 20 

PRODUCT USER GUIDE 

www.acsip.com.tw

 

Table 5 GPIO pin multi-function definition 

IO Name 

CR 

Value Default* 

Name 

Dir 

Default 

Description 

Dir 

PU/PD 

PAD_SYSRST_B 

NA 

PAD_SYSRST_B 

 

 

PU 

Chip hardware fundamental  reset pin 

SDIO_CLK 

0000 

GPIO[6] 

I/O 

PD 

GPIO 6 

0001 * 

SDIO_CLK 

SDIO Clock 

0010 

MSDC0_CLK 

MSDC Clock 

0011 

SPIM0_SCK 

SPI0 (Master) Clock 

0100 

CM33_GPIO_EINT0 

CA33 EINT0 

0101 

DEBUG_0 

Debug signal 

0110 

ANT_SEL0 

Antenna Select 0 

0111 

BGF_EINT_10_B 

 

SDIO_CMD 

0000 

GPIO[7] 

I/O 

PU 

GPIO 7 

0001 * 

SDIO_CMD 

I/O 

SDIO Command 

0010 

MSDC0_CMD 

I/O 

 

0011 

SPIM0_CS_N 

SPI0 (Master) Chip Select 

0100 

CM33_GPIO_EINT1 

CA33 EINT1 

0101 

DEBUG_1 

Debug signal 

0110 

ANT_SEL1 

Antenna Select 1 

0111 

PINMUX_EXT_INT_N

IN 

 

SDIO_DAT0 

0000 

GPIO[8] 

I/O 

PU 

GPIO 8 

0001 * 

SDIO_DAT0 

SDIO Data[0] 

0010 

MSDC0_DAT0 

I/O 

MSDC0 data0 

0011 

SPIM0_MISO 

SPI0 (Master) Input 

0100 

UART0_RTS 

 

0101 

DEBUG_2 

Debug signal 

0110 

ANT_SEL2 

Antenna Select 2 

0111 

CM33_GPIO_EINT0 

CA33 EINT0 

SDIO_DAT1 

0000 

GPIO[9] 

I/O 

PU 

GPIO 9 

0001 * 

SDIO_DAT1 

I/O 

SDIO Data[1] 

0010 

MSDC0_DAT1 

I/O 

MSDC0 data1 

0011 

SPIM0_MOSI 

SPI0 (Master) Output 

0100 

UART0_CTS 

UART0 Control 

0101 

DEBUG_3 

Debug signal 

0110 

ANT_SEL3 

Antenna Select 3 

0111 

CM33_GPIO_EINT1 

CA33 EINT1 

 
 

 

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Summary of Contents for AI7931HD

Page 1: ...sion A Doc No 912 13302 Date 2021 12 07 EK AI7931HD User Guide AcSiP Technology Corp www acsip com tw A c S i p C o n f i d e n t i a l A c S i p C o n f i d e n t i a l A c S i p C o n f i d e n t i...

Page 2: ...te 2021 12 07 Page 1 20 PRODUCT USER GUIDE www acsip com tw Document History Date Revised Contents Revised By Version 2021 12 07 Initial Version Ivan A A c S i p C o n f i d e n t i a l A c S i p C o...

Page 3: ...I7931HD 5 2 2 Installing the FTDI debug board 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 suppl...

Page 4: ...ble 5 GPIO pin multi function definition 16 Figure 1 Front view of EK AI7931HD and FTDI debug board 4 Figure 2 Jumpers and connectors on the EK AI7931HD 5 Figure 3 COM port associated with the EK AI79...

Page 5: ...provide superb performance and low power consumption AI7931HD is designed to support standard based features in the areas of security quality of service and international regulations giving end users...

Page 6: ...igure2 Figure 2 Jumpers and connectors on the EK AI7931HD The description of pins Figure 2 and their functionality is provided below 1 CON6 is a USB 5V power for AI7931HD stamp module or you can use e...

Page 7: ...e 3 Connect a 5V power at EK AI7931HD CON6 with a micro USB cable 4 Check your PC is X86 or X64 system and download and install FTDI Windows serial port driver from Here The red block showed the downl...

Page 8: ...A Doc No 912 13302 Date 2021 12 07 Page 7 20 PRODUCT USER GUIDE www acsip com tw Figure 3 COM port associated with the EK AI7931HD A c S i p C o n f i d e n t i a l A c S i p C o n f i d e n t i a l A...

Page 9: ...e 3 1 3 Platform ARM Cortex M33 MCU with FPU with up to 300MHz clock speed Embedded 1MB SRAM Embedded 16MB serial flash with eXecute In Place XIP and on the fly AES Supports Hardware crypto engines in...

Page 10: ...PHY rate Long range and LE Advertising Extensions Integrated balun and PA Supports BT Wi Fi coexistence 3 1 6 Miscellaneous Embedded eFuse to store specific device information and RF calibration data...

Page 11: ...nstruction set for optimal performance and code size including hardware division single cycle multiplication and bit field manipulation The AI7931HD includes a Memory Protection Unit MPU in Cortex M33...

Page 12: ...ve for extra 3V3 request for other components J32 3V3 for external LDO 1 8V and 0 8V JP4 Switch VCCIO to 3V3 power domain Select pin 1 2 means VCCIO use 3V3 power domain JP7 Switch 1V8 VCCIO from inte...

Page 13: ...t to pin1 and pin2 means audio output to audio jack Select to pin2 and pin3 means audio output to J75 JP6 This jumper switches the audio output trace Select to pin1 and pin2 means audio output to J76...

Page 14: ...test the signals using a compatible cable Please refer to Figure 6 to see more detail Figure 6 On board printed antenna 4 6 RGB LED As Figure7 showed the EK AI7931HD has on board RGB LEDs U54 U55 U56...

Page 15: ...extension connectors for various sensor and device connectivity as shown in Figure 8and described in Table 4 The board has 13 GPIOs multiplexed with other interfaces Depending on the use case user ca...

Page 16: ...IO_18 Reserve for UART0 GPIO_4 Reserve for flash GPIO_19 CON4 10 GPIO_5 Reserve for flash GPIO_20 CON4 11 GPIO_6 CON4 6 GPIO_21 CON4 14 GPIO_7 CON4 3 GPIO_22 CON4 15 GPIO_8 CON4 8 GPIO_23 Reserve for...

Page 17: ...nd 0010 MSDC0_CMD I O 0011 SPIM0_CS_N O SPI0 Master Chip Select 0100 CM33_GPIO_EINT1 I CA33 EINT1 0101 DEBUG_1 O Debug signal 0110 ANT_SEL1 O Antenna Select 1 0111 PINMUX_EXT_INT_N IN I SDIO_DAT0 0000...

Page 18: ...13 I O I PU GPIO 13 0001 USB_IDDIG I USB OTG ID pin 0010 SPIM1_SCK O SPIM1 Master Clock 0011 I2SO_BCK O I2SO BCK 0100 UART1_RX I UART1 RX 0101 DEBUG_7 O 0110 ANT_SEL4 O Antenna Select 4 0111 CM33_GPI...

Page 19: ...0 GPIO 20 I O I PD GPIO 20 0001 CONN_WF_MCU_AICE_TCKC I 0010 UART0_CTS I UART0 Control 0011 I2C1_SCL I I2C1 clock 0100 I2SIN_BCK O I2SRX BCK 0101 DEBUG_12 O Debug signal 0110 PTA_EXT_IF_FACT I 0111 CM...

Page 20: ...10 ANT_SEL3 O Antenna Select 3 0111 CM33_GPIO_EINT1 I CA33 EINT1 GPIO_T_3 0000 GPIO 44 I O I PD GPIO 44 0001 CM33_RSDV3 I O 0010 DBSYS_SWDIO_TMS I CM33 JTAG CM33_SWD 0011 UART1_TX O UART1 TX 0100 UART...

Page 21: ...31HD should plug in a FTDI debug board at U69 Figure 9 Within this FTDI debug board Figure 9 to make UART signal transfer to USB signal This debug board also provide a Micro USB connector to link to w...

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