Usb Virtual Com (Vcom) Port; Power Jack; Power-On Setting; Table 3-3 Nand Flash (U12) Pin Function - Nuvoton NuMicro NuMaker-IoT-MA35D1-A1 User Manual

NAND_nRE
NAND_nWE
NAND_CLE
NAND_ALE
NAND_nCS
NAND_nWP
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
(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.
1
2
3
4
5

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*
Low
Oct. 31, 2022

Table 3-3 NAND Flash (U12) Pin Function

Pin Name
VCOM_3.3V
N123_ICE_DAT
N123_ICE_CLK
N123_nRST
VSS
Page 12 of 43
NuMaker-IoT-MA35D1-A1
PA9
PA10
PA11
PA12
PA13
PA14
Function
DC 3.3V
SWD data pin of NUC123
SWD clock pin of NUC123
Reset pin of NUC123
Ground
Secure Booting
Enable
Rev 1.01