Ddr Phy And Mcp Dram Power Voltage; Audio Codec; Rgmii Gigabit Ethernet; Figure 3-2 Rear View Of Numaker-Iot-Ma35D1-A1 - Nuvoton NuMicro NuMaker-IoT-MA35D1-A1 User Manual

SD1
Micro-SD
(CON5)

Figure 3-2 Rear View of NuMaker-IoT-MA35D1-A1

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
1*2
R252*
R253* 1
1
Note * : 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.
2
Note * : 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.
Oct. 31, 2022
Arduino UNO Compatible Extension Connectors
DRAM_VDD Voltage
1.35V
1.8V
Page 10 of 43
NuMaker-IoT-MA35D1-A1
MA35D1 PN / MCP DRAM Type
MA35D16F987C / DDR3L*
MA35D16F787C / DDR2
RGMII0 RJ45
Connector
(CON6)
RMII1 RJ45
Connector
(CON7)
2
Rev 1.01