Nuvoton NuMicro NuMaker-IoT-MA35D1-A1 User manual

NuMaker-IoT-MA35D1-A1
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NUMAKER-IOT-MA35D1-A1 USER MANUAL
Maker Nu-mbed NUC472 User Manual
NuMicro®Family
Arm®Cortex®-A35-based Microprocessor
NuMaker-IoT-MA35D1-A1
User Manual
Evaluation Board for NuMicro®MA35D1 Series
The information described in this document is the exclusive intellectual property of
Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton.
Nuvoton is providing this document only for reference purposes of NuMicro microcontroller and
microprocessor based system design. Nuvoton assumes no responsibility for errors or omissions.
All data and specifications are subject to change without notice.
For additional information or questions, please contact: Nuvoton Technology Corporation.
www.nuvoton.com

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Table of Contents
1OVERVIEW......................................................................................................6
2FEATURES......................................................................................................7
3HARDWARE CONFIGURATION.....................................................................8
3.1 Front View....................................................................................................................... 8
3.2 Rear View ....................................................................................................................... 8
3.3 DDR PHY and MCP DRAM Power Voltage .............................................................. 9
3.4 Audio Codec................................................................................................................... 9
3.5 RGMII Gigabit Ethernet ................................................................................................ 9
3.6 RMII Megabit Ethernet.................................................................................................. 9
3.7 QSPI Flash ..................................................................................................................... 9
3.8 NAND Flash ................................................................................................................. 10
3.9 USB Virtual COM (VCOM) Port................................................................................. 10
3.10 Power Jack ............................................................................................................. 11
3.11 Power-on Setting ................................................................................................... 11
3.12 Reset and RTC Wake-up Control ....................................................................... 14
3.13 SWJ ......................................................................................................................... 14
3.14 HS USB2.0 Connectors........................................................................................ 15
3.15 RS232 or UART ..................................................................................................... 15
3.16 RS485...................................................................................................................... 16
3.17 CAN FD................................................................................................................... 16
3.18 Raspberry Pi 40-pin Connector........................................................................... 16
3.19 Key Buttons and LEDs.......................................................................................... 18
3.20 CMOS Sensor Capture Connector ..................................................................... 19
3.21 MicroSD Card Slot................................................................................................. 20
3.22 Arduino UNO Compatible Extension Connectors............................................. 21
4QUICK START...............................................................................................24
4.1 Configure Power-on Setting....................................................................................... 24
4.2 Power On the System................................................................................................. 25
4.3 VCOM Port (Optional)................................................................................................. 25
4.4 Press the RTC Wakeup Key Button ......................................................................... 25
5SUPPORTING RESOURCES........................................................................27
5.1 Documents ................................................................................................................... 27

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5.2 Software........................................................................................................................ 27
6NUMAKER-IOT-MA35D1-A1 SCHEMATICS ................................................29
6.1 Power Input Schematic............................................................................................... 29
6.2 Key Buttons and LEDs Schematic............................................................................ 30
6.3 Power-on Setting and SWJ Schematic .................................................................... 31
6.4 CCAP0 Schematic....................................................................................................... 32
6.5 CAN FD, UART and RS485 Schematic ................................................................... 33
6.6 QSPI0 and NAND Flash Schematic ......................................................................... 34
6.7 SD1 Schematic ............................................................................................................ 35
6.8 RGMII0_PE Schematic............................................................................................... 36
6.9 RMII1_PF Schematic.................................................................................................. 37
6.10 NAU88C22 Audio Codec Schematic .................................................................. 38
6.11 NUC123 VCOM Schematic.................................................................................. 39
6.12 HSUSB 0/1 Schematic.......................................................................................... 40
6.13 PCB Placement...................................................................................................... 41
7REVISION HISTORY .....................................................................................42

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List of Figures
Figure 1-1 NuMaker-IoT-MA35D1-A1 Board ................................................................................... 6
Figure 3-1 Front View of NuMaker-IoT-MA35D1-A1........................................................................ 8
Figure 3-2 Rear View of NuMaker-IoT-MA35D1-A1........................................................................ 8
Figure 3-3 UART, RS485, CAN Headers and Raspberry Pi Connector........................................ 18
Figure 3-4 Arduino UNO Compatible Extension Connectors......................................................... 21
Figure 4-1 Power-on Setting DIP Switch (SW7)............................................................................ 24
Figure 4-2 USB VCOM Port (CON9).............................................................................................. 25
Figure 4-3 RTC Wakeup Key Button (SW1).................................................................................. 26
Figure 5-1 Nuvoton Website .......................................................................................................... 27
Figure 5-2 MA35D1 GitHub Resources ......................................................................................... 28
Figure 6-1 Power Input Schematic................................................................................................. 29
Figure 6-2 Key Buttons and LEDs Schematic................................................................................ 30
Figure 6-3 Power-on Setting and SWJ Schematic......................................................................... 31
Figure 6-4 CCAP0 Schematic........................................................................................................ 32
Figure 6-5 CAN FD, UART and RS485 Schematic........................................................................ 33
Figure 6-6 QSPI0 and NAND Flash Schematic............................................................................. 34
Figure 6-7 SD1 Schematic............................................................................................................. 35
Figure 6-8 RGMII0_PE Schematic................................................................................................. 36
Figure 6-9 RMII1_PF Schematic.................................................................................................... 37
Figure 6-10 NAU88C22 Audio Codec Schematic.......................................................................... 38
Figure 6-11 NUC123 VCOM Schematic ........................................................................................ 39
Figure 6-12 HSUSB 0/1 Schematic ............................................................................................... 40
Figure 6-13 Front PCB Placement of NuMaker-IoT-MA35D1-A1 Board....................................... 41
Figure 6-14 Rear PCB Placement of NuMaker-IoT-MA35D1-A1 Board........................................ 41

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List of Tables
Table 3-1 DDR PHY and MCP DRAM Power Voltage Selection..................................................... 9
Table 3-2 QSPI0 Flash (U11) Pin Function ................................................................................... 10
Table 3-3 NAND Flash (U12) Pin Function.................................................................................... 10
Table 3-4 NUC123 ICE Interface (J9) Pin Funciton....................................................................... 11
Table 3-5 Secure Boot Options...................................................................................................... 11
Table 3-6 Booting Source QSPI0 and SD/eMMC IO Voltage Options .......................................... 11
Table 3-7 Booting Source Options................................................................................................. 12
Table 3-8 Page Size Options for NAND Flash Booting Source..................................................... 12
Table 3-9 ECC Options for NAND Flash Booting Source.............................................................. 12
Table 3-10 Options for SD Card 0/1 or eMMC 0/1 NAND Flash Device Booting Source.............. 12
Table 3-11 4/8-bit Options for eMMC NAND Flash Device Booting Source.................................. 13
Table 3-12 1-bit Options for QSPI0 NAND/NOR Flash Booting Source........................................ 13
Table 3-13 Options for USBD or USBH Booting Source ............................................................... 13
Table 3-14 USBH Port 0/1 Options for USBH Booting Source...................................................... 13
Table 3-15 Over-current High/Low-active Detect Options for USBH Booting Source................... 14
Table 3-16 RTC Power Control Pins of MA35D1........................................................................... 14
Table 3-17 SWJ Interface (CON12) Pin Funciton.......................................................................... 15
Table 3-18 RS232_10 Header (J5) Pin Funciton (V2.3)................................................................ 16
Table 3-19 UART_10 Header (J5) Pin Funciton (V2.4)................................................................. 16
Table 3-20 RS485_12 Header (J6) Pin Funciton........................................................................... 16
Table 3-21 CAN_1 Header (J2) Pin Funciton................................................................................ 16
Table 3-22 Raspberry Pi 40-pin Connector (CON4) Pin Funciton................................................. 18
Table 3-23 Key Buttons (KEY_0, KEY_1, KEY_2, KEY_3) Pin Function...................................... 19
Table 3-24 LEDs (LED_0 , LED_1, LED_2) Pin Function ............................................................. 19
Table 3-25 CCAP0 Connector (CON3) Pin Funciton..................................................................... 20
Table 3-26 SD1 MicroSD Card Slot (CON5) Pin Function ............................................................ 20
Table 3-27 PN11 Pin State Control for SD1 VDD_SDIO 3.3V or 1.8V Power Voltage................. 21
Table 3-28 PN14 or nRESET Pin State Control for SD1 MicroSD Card Power ON or OFF ......... 21
Table 3-29 Arduino UNO Interface Connector 1 (NU1) Pin Funciton............................................ 22
Table 3-30 Arduino UNO Interface Connector 2 (NU2) Pin Funciton............................................ 22
Table 3-31 Arduino UNO Interface Connector 3 (NU3) Pin Funciton............................................ 22
Table 3-32 Arduino UNO Interface Connector 4 (NU4) Pin Funciton............................................ 23
Table 4-1 Secure Boot Disable Configuration................................................................................ 24
Table 4-2 QSPI0 Boot Source IO Voltage Configuration............................................................... 24
Table 4-3 QSPI0 Boot Source Configuration................................................................................. 25
Table 4-4 QSPI0 Boot Source SPI NAND 1-bit Configuration....................................................... 25

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1 OVERVIEW
The NuMaker-IoT-MA35D1-A1 evaluation board provides the Ethernet and connectivity features of
Nuvoton NuMicro MA35D1 series microprocessors (MPUs), based on MA35D16F987C (LQFP216
package, and stacking a 512 MB DDR). The NuMaker-IoT-MA35D1-A1 includes rich peripherals such
as one set of Gigabit Ethernet, one set of Megabit Ethernet, high-speed USB2.0 Host and device, one
set of SD2.0 in Micro SD slot, one set of CAN FD, and RS-485 and RS232 serial communication ports.
Furthermore, the NuMaker-IoT-MA35D1-A1 provides discrete power supply to be the reference design.
It also provides compatible headers with Raspberry Pi and Arduino UNO for minimizing effort in
connecting popular sensors and modules to the system. Based on these features, it helps user to
facilitate the evaluation in IIoT Edge Gateway, Smart Building, Smart Agriculture, T-Box, 4G/5G Base
Station, or your creative applications.
There are two evaluation boards for the MA35D1 series, NuMaker-HMI-MA35D1-S1 and NuMaker-IoT-
MA35D1-A1, which are ideal for HMI and edge gateway applications, respectively. For more details on
HMI applications, please refer to NuMaker-HMI-MA35D1-S1 User Manual. For more details on edge
gateway applications, please refer to NuMaker-IoT-MA35D1-A1 User Manual.
The NuMicro MA35D1 series is a heterogeneous multi-core microprocessor targeted to high-end edge
IIoT gateway. It is based on dual 64-bit Arm Cortex-A35 cores with speed up to 800 MHz, and one 180
MHz Arm Cortex-M4 core. Based on the high-performance cores, the MA35D1 series facilities the tiny
AI/ML for edge computing.
The MA35D1 series supports 16-bit DDR2 and DDR3/DDR3L SDRAM. For an easy system design and
manufacture, the MA35D1 series also offers LQFP and BGA packages stacked with the DDR2/DDR3L
SDRAM and density up to 512 MB, which significantly reduces PCB layer, size and electromagnetic
interference (EMI).
The MA35D1 series is a trusted system for IoT products' security requirements. It includes several
advanced security mechanisms such as Nuvoton Trusted Secure Island (TSI) an isolated secure
hardware unit, TrustZone, secure boot, tamper-detection, built-in cryptographic accelerators, and a
TRNG, as well as Key Store and OTP memory. All the security operations are performed in the TSI to
protect sensitive and high-value data. The features also satisfy customers in IEC 62443 certification
requirements.
For high-end edge IIoT gateway requirements, the MA35D1 series provides multiple advanced and high-
speed connection interfaces, such as Gigabit Ethernet, SDIO3.0, USB 2.0 HS, and CAN FD, for edge
gateway and new energy applications.
For HMI applications, the MA35D1 series provides a LCD display controller with the resolution up to
1920x1080 at 60 FPS, a 2D graphic engine, a JPEG and a H.264 decoder integrated for better graphical
HMI effects and video playback.
Figure 1-1 NuMaker-IoT-MA35D1-A1 Board

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2 FEATURES
Target Chip: MA35D16F987C (LQFP216) MCP package with DDR3L (512 MB), which can
run up to 800 MHz
Power:
–5V/2A Power Jack, USB VCOM Port or HSUSB0 Device
–Battery header for RTC power
Debug:
–UART0 debug port: USB Virtual COM (VCOM) port
–Debug port: SWJ (JTAG + SWD) connector
Memory Devices
–An on-board Quad SPI NAND Flash device (512 MB)
–An on-board NAND Flash device (1 GB)
–MicroSD memory card (SD1, supports SD3.0)
One power-on setting DIP-Switch for evaluation booting source selection
One set of Gigabit Ethernet port: One Gigabit Ethernet (RGMII) PHY device, transformer
and RJ45 port connector
One set of Megabit Ethernet port: One Megabit Ethernet (RMII) PHY device, transformer
and RJ45 port connector
Two sets of high speed USB ports: One Host/Device port and one Host port
One Raspberry Pi 40-pin header connector
Arduino UNO compatible extension connectors
One camera capture (CMOS sensor) header connector
One audio codec with microphone input and speaker output
One UART header
One set of RS485 transceiver and header connector
One set of CAN FD transceiver and header connector
Four user key buttons
Three user LEDs

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3 HARDWARE CONFIGURATION
3.1 Front View
Figure 3-1 shows the main components and connectors from the front side of NuMaker-IoT-MA35D1-
A1 board.
Target Chip (U1): MA35D16F987C (LQFP216) MCP package with DDR3L (512MB).
Speaker
Header
(J7)
Target Chip
(U1, MA35D16F787C)
QSPI0 SPI-NAND Flash
(U11, W25N04KVZEIR)
NAND Flash
(U12, W29N08GVSIAA)
CCAP0
Connector
(CON3)
HSUSB1
Host
(CON11)
USB VCOM Port
(CON9)
RGMII0 Gigabit PHY
& Transformer
(U14, RTL8211FDI)
(U15, GST5009BM)
SWJ
Connector
(CON12)
Power-on Setting
DIP Switch
(SW7)
Key Buttons
(SW3/SW4/SW5/SW6)
Raspberry Pi
Connector
(CON4)
RTC Battery
Header
(J1)
Reset Key
(SW2)
Microphone
(M1)
Headset Jak
(CON8)
Audio codec
(U18, NAU88C22)
USB0_ID
Header
(J10)
LEDs
RMII1 10/100 PHY
& Transformer
(U16, RTL8201FI)
(U17, TS8121C) RTC Wakeup Key
(SW1)
UART_10
Header
(J5)
CAN_1
Transceiver &
Header
(U7, J2)
SWJ_nRESET
Header
(J3)
HSUSB0
Host/Device
(CON10)
VCOM Controller
(U19, NUC123ZD4AN0)
NUC123 ICE
Interface
(J9)
5V/2A
Power Jack
(CON2)
+-
RS485_12
Transceiver &
Header
(U9, J6)
Figure 3-1 Front View of NuMaker-IoT-MA35D1-A1
3.2 Rear View
Figure 3-2 shows the main components and connectors from the rear side of NuMaker-IoT-MA35D1-A1
board.
RMII1 RJ45
Connector
(CON7)
RGMII0 RJ45
Connector
(CON6)
SD1
Micro-SD
(CON5)
Arduino UNO Compatible Extension Connectors
(NU1/NU2/NU3/NU4)
Figure 3-2 Rear View of NuMaker-IoT-MA35D1-A1

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3.3 DDR PHY and MCP DRAM Power Voltage
DDR PHY and MCP DRAM Power Selection Resistors (R252 and R253): These two resistors
R252 and R253 can decide the power voltage (1.35V or 1.8V) of DRAM_VDD that feeds to the
internal DDR PHY and MCP DARM of MA35D1 target chip.
Mounted on PCB
DRAM_VDD Voltage
MA35D1 PN / MCP DRAM Type
R252*1*2
1.35V
MA35D16F987C/MA35D16F887C
/ DDR3L*2
R253*1
1.8V
MA35D16F787C / DDR2
Note *1: Only one resistor R252 or R253 can be mounted on the PCB and user should make sure
which part number chip of MA35D1 series that be mounted on the this NuMaker-IoT-MA35D1-A1
board.
Note *2: By default, only R252 resistor and MA35D16F987C target chip are mounted on the NuMaker-
IoT-MA35D1-A1 board.
Table 3-1 DDR PHY and MCP DRAM Power Voltage Selection
3.4 Audio Codec
Audio Codec Device (U18): Nuvoton NAU88C22 is audio codec device that integrates microphone
input, speaker output and headphone output for audio application on this board.
Headset Jack (CON8): A headset input jack that follows CTIA definition.
Speaker Connector (J7): To connect a speaker to output audio sound.
Microphone (M1): An on-board microphone for audio sound input.
3.5 RGMII Gigabit Ethernet
RGMII0 Gigabit PHY (U14) and Transformer (U15): The RGMII0 MAC of MA35D1 series needs
an external Gigabit PHY (RTL8211FDI) and a transformer (GST5009BM) to connect with the
Ethernet network.
RGMII0 RJ45 Connector (CON6): The Ethernet RGMII0 RJ45 connector.
3.6 RMII Megabit Ethernet
RMII1 Megabit PHY (U16) and Transformer (U17): The RMII1 MAC of MA35D1 series needs an
external Megabit PHY (RTL8201FI) and a transformer (TS8121C) to connect with the Ethernet
network.
RMII1 RJ45 Connector (CON7): The Ethernet RMII1 RJ45 connector.
3.7 QSPI Flash
QSPI0 Flash (U11): Winbond SPI NAND Flash (W25N04KWZEIR, 512MB) for optional booting
source, supporting dual / quad mode.
Pin No.
Pin Name
GPIO pin of MA35D1
1
QSPI0_SS0
PD0
2
QSPI0_MISO0
PD3
3
QSPI0_MOSI1
PD4

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4
VSS
-
5
QSPI0_MOSI0
PD2
6
QSPI0_CLK
PD1
7
QSPI0_MISO1
PD5
8
QSPI0_VDD*
Note *: The power group of these GPIO PD0~PD5 belongs to the VDDIO5 power domain of MA35D1
series, the default voltage of VDDIO5 (power input VDD_QSPI0) is VDD1V8 (DC 1.8V) on this
NuMaker-IoT-MA35D1-A1 board.
Table 3-2 QSPI0 Flash (U11) Pin Function
3.8 NAND Flash
NAND Flash (U12): Winbond NAND Flash (W29N08GVSIAA, 1GB) for optional booting source.
Function Name
GPIO pin of MA35D1
NAND_DATA0
PA0
NAND_DATA1
PA1
NAND_DATA2
PA2
NAND_DATA3
PA3
NAND_DATA4
PA4
NAND_DATA5
PA5
NAND_DATA6
PA6
NAND_DATA7
PA7
NAND_RDY
PA8
NAND_nRE
PA9
NAND_nWE
PA10
NAND_CLE
PA11
NAND_ALE
PA12
NAND_nCS
PA13
NAND_nWP
PA14
Table 3-3 NAND Flash (U12) Pin Function
3.9 USB Virtual COM (VCOM) Port
USB VCOM Port (CON9, USB Micro-AB Receptacle): The NUC123ZD4AN0 microcontroller
(MCU) (U19) acts as an USB VCOM device to communicate data between the UART0 port of
MA35D1 series and USB host of PC. An USB cable should be connected with this micro-AB
connector (CON9) and should be plugged-in the PC host to display the debug messages on PC

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(Optional).
VCOM Controller (U19): The NUC123ZD4AN0 microcontroller (U19) acts as an USB VCOM
device to communicate data between the UART0 port of MA35D1 series and USB host of PC.
NUC123 ICE Interface (J9): The ICE interface of NUC123ZD4AN0 microcontroller (U19) for
programming the internal Flash of NUC123 series MCU. The internal Flash of NUC123 series
MCU had been programmed and acts as an USB VCOM device before the NuMaker-IoT-MA35D1-
A1 board is delivered by Nuvoton.
Pin No.
Pin Name
Function
1
VCOM_3.3V
DC 3.3V
2
N123_ICE_DAT
SWD data pin of NUC123
3
N123_ICE_CLK
SWD clock pin of NUC123
4
N123_nRST
Reset pin of NUC123
5
VSS
Ground
Table 3-4 NUC123 ICE Interface (J9) Pin Funciton
3.10 Power Jack
5V Power Jack (CON2): This power jack needs to connect an extra adapter to supply DC 5V/2A
power input for this board.
3.11 Power-on Setting
Power-on Setting DIP Switch (SW7): The GPIO PG0, PG1, PG2, PG3, PG4, PG5, PG6 and PG7
determine how to boot the evaluation environment on the NuMaker-IoT-MA35D1-A1 board. These
GPIO pins are internal weakly pull-down.
Options for secure boot enable or disable:
SW7.1 / PG0*
Secure Booting
Low
Enable
High
Disable
Note *: The GPIO PG0 is internal weakly pull-down.
Table 3-5 Secure Boot Options
Options for booting source QSPI0 and SD/eMMC IO voltage selection:
SW7.1 / PG1*
Boot Source QSPI0 and SD/eMMC I/O Voltage
Low
3.3V
High
1.8V
Note *: The GPIO PG1 is internal weakly pull-down.
Table 3-6 Booting Source QSPI0 and SD/eMMC IO Voltage Options
Options for booting source selection:

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SW7.4 / PG3*1
SW7.3 / PG2*1
Booting Source
Low
Low
QSPI0 Flash
Low
High
SD/eMMC*2
High
Low
NAND Flash
High
High
USB
Note *1: These GPIO PG2 and PG3 are internal weakly pull-down.
Note *2: There’s only SD1 micro card slot on this NuMaker-IoT-MA35D1-A1 board.
Table 3-7 Booting Source Options
Options for booting from NAND Flash device:
SW7.6 / PG5*
SW7.5 / PG4*
Boot from NAND Flash
Low
Low
Ignore
Low
High
NAND Page = 2KB
High
Low
NAND Page = 4KB
High
High
NAND Page = 8KB
Note *: These GPIO PG4 and PG5 are internal weakly pull-down.
Table 3-8 Page Size Options for NAND Flash Booting Source
SW7.8 / PG7*
SW7.7 / PG6*
Boot from NAND Flash
Low
Low
Ignore
Low
High
BCH T12
High
Low
BCH T24
High
High
NO ECC
Note *: These GPIO PG6 and PG7 are internal weakly pull-down.
Table 3-9 ECC Options for NAND Flash Booting Source
Options for booting from SD0/1 card or eMMC0/1 NAND Flash memory device:
SW7.7 / PG6*1
Boot from SD/eMMC
Low
SD0/eMMC0 Boot
High
SD1/eMMC1 Boot*2
Note *1: The GPIO PG6 is internal weakly pull-down.
Note *2: There’s only SD1 micro card slot on this NuMaker-IoT-MA35D1-A1 board.
Table 3-10 Options for SD Card 0/1 or eMMC 0/1 NAND Flash Device Booting Source

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SW7.8 / PG7*1
Boot from SD/eMMC
Low
eMMC 4-bit Booting*2
High
eMMC 8-bit Booting*2
Note *1: The GPIO PG7 is internal weakly pull-down.
Note *2: There’s no eMMC1 NAND Flash memory device on this NuMaker-IoT-MA35D1-A1 board.
Table 3-11 4/8-bit Options for eMMC NAND Flash Device Booting Source
Options for booting from QSPI0 Flash device:
SW7.8 / PG7*
SW7.7 / PG6*
Boot from QSPI0 Flash
Low
Low
SPI NAND 1-bit
High
Low
SPI NOR 1-bit
Note *: These GPIO PG6 and PG7 are internal weakly pull-down.
Table 3-12 1-bit Options for QSPI0 NAND/NOR Flash Booting Source
Options for booting from USBD or USBH:
SW7.5 / PG4*1
Boot from USB
Low
USB Device Booting
High
USB Host Booting*2
Note *1: The GPIO PG4 is internal weakly pull-down.
Note *2: It does not support USB Host booting on V2.3 board but supports on V2.4 board.
Table 3-13 Options for USBD or USBH Booting Source
SW7.6 / PG5*1
Boot from USBH*2
Low
USBH Port 0 Booting*3
High
USBH Port 1 Booting*3
Note *1: The GPIO PG5 is internal weakly pull-down.
Note *2: It does not support USB Host booting on V2.3 board but supports on V2.4 board.
Note *3: It only supports USB Host Port 1 booting on V2.4 board.
Table 3-14 USBH Port 0/1 Options for USBH Booting Source
SW7.7 / PG6*1
Boot from USBH*2
Low
Over-current Low-active Detect
High
Over-current High-active Detect
Note *1: The GPIO PG6 is internal weakly pull-down.

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Note *2: It does not support USB Host booting on V2.3 board but supports on V2.4 board.
Table 3-15 Over-current High/Low-active Detect Options for USBH Booting Source
3.12 Reset and RTC Wake-up Control
Reset Button (SW2): Press this key to reset the MA35D1 target chip on this NuMaker-IoT-
MA35D1-A1 board.
RTC Battery Connector (J1): Optional to supply the RTC power from battery. (DC 3.3V from
VDD3V3 on this board by default).
RTC Wake-up Key Button (SW1): Press this key to wake up the MA35D1 target chip on this
NuMaker-IoT-MA35D1-A1 board from standby state.
RTC Wake-up Control Pins: The RTC_RPWR and RTC_nRWAKE pins of MA35D1 are the RTC
wake-up control pins to control the related DC/DC power whether output voltages or not.
Pin No.
Pin Name of MA35D1
Function Description
Pin 9 of U1
RTC_RPWR*1
RTC wake-up output pin for external DC/DC (for
example, the discrete power IC devices on this
NuMaker-IoT-MA35D1-A1 board) enable pin control.
Pin 11 of U1
RTC_nRWAKE*2*3
RTC wake-up interrupt input with internal pull-high
Note *1: This RTC_RPWRoutput pin of MA35D1 is wired directly to these EN input pins of the discrete
power IC devices (U2~U6) on this NuMaker-IoT-MA35D1-A1 board by default. (Only the R250
resistor is mounted on board, but both R189 and R210 are unmounted)
Note *2: This RTC_nRWAKE input pin is wired directly to the RTC Wakeup key button (SW1) on
NuMaker-IoT-MA35D1-A1 board by default.
Note *3: This RTC_nRWAKE pin is internal pull-high. If user does not use the RTC wake-up interrupt
function, please pull this pin to low. In this condition, user also needs to disable the PWRST bit
(RTC_PWRCTL[6]) of the RTC Power Control Register by clearing it for saving the RTC power
consumption.
Table 3-16 RTC Power Control Pins of MA35D1
3.13 SWJ
SWJ_nRESET Header (J3): A jumper is needed if SWJ_nRESET should be connected with
nRESET signal.
SWJ Interface (CON12): Arm JTAG and SWD interface for tracing or debugging code.
Pin No.
Pin Name
GPIO pin of
MA35D1
Default
Connected R#
Conflict Function
/ R#
1
VDD3V3
-
-
-
2
VDD3V3
-
-
-
3
JTAG_nTRST
PG15
R151
I2S0_DO / R45*
4
VSS
-
-
-
5
JTAG_TDI
PG14
R149
I2S0_DI / R44*
6
VSS
-
-
-

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JTAG_TMS /
SW_DIO
PG13
R147
I2S0_BCLK / R43*
8
VSS
-
-
-
9
JTAG_TCK /
SW_CLK
PG12
R146
I2S0_LRCK / R42*
10
VSS
-
-
-
11
VSS
-
-
-
12
VSS
-
-
-
13
JTAG_TDO
PG11
R145
I2S0_MCLK / R41*
14
VSS
-
-
-
15
SWJ_nRESET
nRESET
J3
-
16
VSS
-
-
-
17
-
-
-
-
18
VSS
-
-
-
19
-
-
-
-
20
VSS
-
-
-
Note *: No connection (NC) by default.
Table 3-17 SWJ Interface (CON12) Pin Funciton
3.14 HS USB2.0 Connectors
USB0_ID Header (J10): Optional to pull-down the ID pin of HSUSB0 by a jumper to force HSUSB0
to always act as an USB Host.
HSUSB0 Host/Device (CON10, USB Micro-AB Receptacle): HSUSB0 can act as an USB Host or
Device that depends on the ID pin state of plugged-in USB cable or always acts as Host by
connecting a jumper on the J10 connector to force the ID pin of HSUSB0 at low state.
HSUSB1 Host (CON11, USB Type-A Receptacle): HSUSB1 for USB Host with type-A connector.
Note: USB power switch device (U22) had removed on NuMaker-IoT-MA35D1-A1 board in V2.4.
3.15 RS232 or UART
RS232_10 Transceiver (U8, only supported in V2.3) and Header (J5, old funtion definitions in
V2.3): The UART10 transceiver (SN75C3232EDR) and header (J5).
Pin No.
Function Name
1
UR10_TX
2
UR10_RX
3
UR10_CT
4
UR10_RT

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VSS
Table 3-18 RS232_10 Header (J5) Pin Funciton (V2.3)
UART_10 Header (J5, new funtion definitions in V2.4): The UART10 header (J5).
Note: RS232 transceiver (U8) had removed on NuMaker-IoT-MA35D1-A1 board in V2.4.
Pin No.
Function Name
1
UART10_TXD
2
UART10_RXD
3
UART10_nCTS
4
UART10_nRTS
5
VSS
Table 3-19 UART_10 Header (J5) Pin Funciton (V2.4)
3.16 RS485
RS485_12 Transceiver (U9) and Header (J6): The UART12 transceiver (SN65HVD11DR) and header
(J6).
Pin No.
Function Name
1
RS485_A3_1
2
RS485_B3_1
Table 3-20 RS485_12 Header (J6) Pin Funciton
3.17 CAN FD
CAN_1 Transceiver (U7) and Header (J2): The CAN_1 transceiver (TCAN332GD in V2.2,
TLE9351VSJ in V2.3/V2.4) and header (J2).
Note: For more accurate DC 5V power input to the CAN_1 Transceiver (TLE9351VSJ) and let it
works normally under V2.3/V2.4, please make sure the 5V/2A adapter is plugged-in the Power
Jack (CON2) to supply the power to this NuMaker-IoT-MA35D1-A1 board.
Pin No.
Function Name
1
CAN1_H
2
CAN1_L
Table 3-21 CAN_1 Header (J2) Pin Funciton
3.18 Raspberry Pi 40-pin Connector
Raspberry Pi 40-pin Connector (CON4):
Pin No.
GPIO pin of MA35D1
Function
1
-
VDD3V3
2
-
VDD5V*

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PC4
I2C5_SDA
4
-
VDD5V*
5
PC5
I2C5_SCL
6
-
VSS
7
PN15
-
8
PH15
UART14_TXD
9
-
VSS
10
PH14
UART14_RXD
11
PI13
-
12
PG6
-
13
PH3
-
14
-
VSS
15
PI14
-
16
PI15
-
17
-
VDD3V3
18
PH0
-
19
PL14
SPI0_MOSI
20
-
VSS
21
PL15
SPI0_MISO
22
PH1
-
23
PB9
SPI0_CLK
24
PG0
SPI0_SS0
25
-
VSS
26
PB8
SPI0_SS1
27
PC0
I2C4_SDA
28
PC1
I2C4_SCL
29
PI8
-
30
-
VSS
31
PI9
-
32
PI10
-
33
PI11
-

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-
VSS
35
PG7
-
36
PI12
-
37
PH2
-
38
PG5
-
39
-
VSS
40
PG4
-
Note *: For more accurate DC 5V power, please make sure the 5V/2A adapter is plugged-in the
Power Jack (CON2) to supply the power to this NuMaker-IoT-MA35D1-A1 board.
Table 3-22 Raspberry Pi 40-pin Connector (CON4) Pin Funciton
Figure 3-3 shows the UART, RS485, CAN headers and Raspberry Pi connector.
CAN1_L J2.2
CAN1_H J2.1
RS485_B3_1 J6.2
RS485_A3_1 J6.1
VSS J5.5
UART10_RTS J5.4
UART10_CTS J5.3
UART10_RXD J5.2
UART10_TXD J5.1
CON4.1 VDD3V3 CON4.2 VDD5V
CON4.3 PC4 I2C5_SDA CON4.4 VDD5V
CON4.5 PC5 I2C5_SCL CON4.6 VSS
CON4.7 PN15 CON4.8 PH15 UART14_TXD
CON4.9 VSS CON4.10 PH14 UART14_RXD
CON4.11 PI13 CON4.12 PG6
CON4.13 PH3 CON4.14 VSS
CON4.15 PI14 CON4.16 PI15
CON4.17 VDD3V3 CON4.18 PH0
CON4.19 PL14 SPI0_MOSI CON4.20 VSS
CON4.21 PL15 SPI0_MISO CON4.22 PH1
CON4.23 PB9 SPI0_CLK CON4.24 PG0 SPI0_SS0
CON4.25 VSS CON4.26 PB8 SPI0_SS1
CON4.27 PC0 I2C4_SDA CON4.28 PC1 I2C4_SCL
CON4.29 PI8 CON4.30 VSS
CON4.31 PI9 CON4.32 PI10
CON4.33 PI11 CON4.34 VSS
CON4.35 PG7 CON4.36 PI12
CON4.37 PH2 CON4.38 PG5
CON4.39 VSS CON4.40 PG4
Figure 3-3 UART, RS485, CAN Headers and Raspberry Pi Connector
3.19 Key Buttons and LEDs
User-define Key Buttons (KEY_0, KEY_1, KEY_2, KEY_3):
KEY_#
SW#
GPIO pin of MA35D1
Pull-up Power
KEY_0
SW3
PN2
VDD3V3

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KEY_1
SW4
PN3
VDD3V3
KEY_2
SW5
PN12
VDD3V3
KEY_3
SW6
PN13
VDD3V3
Table 3-23 Key Buttons (KEY_0, KEY_1, KEY_2, KEY_3) Pin Function
User Indication LEDs (LED_0, LED_1, LED_2):
LED_#
Function / Color
GPIO pin of MA35D1
LED_0
LEDR1 / Red
PN6
LED_1
LEDG1 / Green
PN7
LED_2
LEDY1 / Yellow
PN10
Table 3-24 LEDs (LED_0 , LED_1, LED_2) Pin Function
3.20 CMOS Sensor Capture Connector
CCAP0 Connector (CON3): This connector is used to connect CMOS sensor for image capture
application thru the CCAP0 (Camera Capture 0) interface.
Pin No.
Pin Name
GPIO pin of MA35D1
1
VSS
-
2
VSS
-
3
CCAP0_PIXCLK
PK10
4
CCAP0_SCLK
PK9
5
CCAP0_DATA0
PM2
6
CCAP0_DATA1
PM3
7
CCAP0_DATA2
PM4
8
CCAP0_DATA3
PM5
9
CCAP0_DATA4
PM6
10
CCAP0_DATA5
PM7
11
CCAP0_DATA6
PM8
12
CCAP0_DATA7
PM9
13
CCAP0_DATA8
PM10
14
CCAP0_DATA9
PM11
15
CCAP0_VSYNC
PM0
16
CCAP0_HSYNC
PK11
17
CCAP0_PWDN
PC12

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CCAP0_nRST
PM1
19
CCAP0_I2C2_SCL
PN1
20
CCAP0_I2C2_SDA
PN0
21
VDD3V3
22
VDD3V3
23
VSS
24
VSS
Table 3-25 CCAP0 Connector (CON3) Pin Funciton
3.21 MicroSD Card Slot
SD1 MicroSD Card Slot (CON5): Supports SD1 (SD3.0) for optional system booting.
Pin No.
Pin Name
GPIO pin of MA35D1
Default Connected R#
1
SD1_DTA2*1
PJ10
R227
2
SD1_DAT3*1
PJ11
R228
3
SD1_CMD*1
PJ6
R229
4
VDD (VDD_SD*2)
-
-
5
SD1_CLK*1
PJ7
R230
6
VSS
-
-
7
SD1_DAT0*1
PJ8
R231
8
SD1_DAT1*1
PJ9
R232
9
SD1_nCD*1
PJ5
-
10
VSS
-
-
11
VSS
-
-
12
VSS
-
-
13
VSS
-
-
Note *1: The GPIO PN11 pin controls the VDD_SDIO power, the I/O and pull-up voltage of these SD1
group signals, to output 3.3V or 1.8V voltage.
Note *2: The GPIO PN14 pin or nRESET signal controls the ON/OFF of VDD_SD power that feeds
the fixed 3.3V to the MicroSD card slot or not.
Table 3-26 SD1 MicroSD Card Slot (CON5) Pin Function
SD1 VDD_SDIO Power Voltage Control: The GPIO PN11 pin controls the output voltage 3.3V or
1.8V of VDD_SDIO power.
PN11 State
SD1 VDD_SDIO Power Voltage