SOM-4418

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1 Introduction

Overview

Front

Back

• The SOM-4418 quad core Cortex A9 core board is designed and developed by FriendlyELEC for professional and enterprise users. It uses the Samsung Quad Core Cortex-A9 S5P4418 SoC with dynamic frequency scaling up to 1.4GHz. SOM-4418 has 8G eMMC, 1GB 32bit-DDR3, GigE, and audio codec. To avoid overheat issues the SOM-4418 has a heat sink with mounting posts.
• The SOM-4418 has LVDS and RGB-LCD interface, support resistive touch and capacitive touch.
• The SOM-4418 also has USB HOST, UARTs, I2Cs, SPI, PWM, GPIOs etc.

2 Hardware Spec

• SoC：Samsung S5P4418 Quad Core Cortex-A9 with dynamic frequency scaling up to 1.4G Hz
• PMU Power Management: Implemented by an MCU, support solftware power-off, and RTC alarm power-on functions
• System Memory：1GB 32bit DDR3 RAM
• eMMC：8GB
• Ethernet：Gbps Ethernet Port (RTL8211E) with unique MAC, support WOL(Wake On Lan)
• Video Input: MIPI-CSI
• Video Output: HDMI / LVDS / LCD
• Audio: Build in Codec, 2-Chanel headphone output, one Microphone input
• USB: 4 x USB 2.0 Host(Via USB Hub), 1 x USB 2.0 OTG
• GPIO: 13 x GPIOs, 3 x I2Cs, 1 x SPI, 5 x UARTs, 3 x PWMs, 2 x SDIOs
• LED: 1 x power LED , 1 x SYS LED
• Other Resource: 1 x onboard thermistor
• Power: DC 5V/1A
• Heat Sink: Aluminum heat sink
• PCB: Six Layer, ENIG
• PCB Dimension: 67.7 mm x 40 mm
• Working Temperature: -40℃ to 70℃

4 Diagram, Layout and Dimension

4.1 Layout

SOM-4418 Layout

• 204 Pin Spec
  • Socket Type：0.6mm Pitch 204-Pin Standard Type DDR3 SODIMM Socket

Pin#	Name	Description	Pin#	Name	Description
1	VDD_5V	4.7~5.5V Power Suply input	2	VDD_5V	4.7~5.5V Power Suply input
3	VDD_5V		4	VDD_5V
5	VDD_5V		6	VDD_5V
7	GND		8	GND
9	GND		10	VRTC_IN	RTC backup battery（3V）input，backup current is 3.5uA
11	VCC_WIFI_IO(3.3V)	MMC1 IO reference power，connect to wifi module IO power input	12	VCC_IO(3.3V)	3.3V out for IO reference
13	MMC1_D0	SDIO1/MMC1, connect to wifi module	14	BOOT_CS	Pull low this pin to boot from SD CARD on MMC0
15	MMC1_D1		16	PWRKEY	Power key
17	MMC1_D2		18	NRESETIN	Hard reset input
19	MMC1_D3		20	AliveGPIO3	GPIO, reserved for RecoveryKey
21	MMC1_CMD		22	EXT_PWR_CTRL	Used this pin to control power on/off of the carrier
23	GND		24	MMC0_D0	SDIO0/MMC0, for SD Card
25	MMC1_CLK	SDIO1 Clock Out	26	MMC0_D1
27	WL_REG_ON(GPIOB24)	GPIOB24, Used as wifi power on control signal	28	MMC0_D2
29	WL_HOST_WAKE(GPIOC17)	GPIOC17, Used as wifi wake-up signal	30	MMC0_D3
31	UART1_TX	UART1, connect to bluetooth module	32	MMC0_CMD
33	UART1_RX		34	MMC0_CD
35	UART1_nCTS		36	MMC0_CLK
37	UART1_nRTS		38	GND
39	BT_RST_N(GPIOB8)	GPIOB8, Used as bluetooth reset	40	MIPI_CSI0_CLKN	MIPI CSI Clock
41	BT_WAKE	bluetooth wake-up signal	42	MIPI_CSI0_CLKP
43	BT_HOST_WAKE(/NC)	Reserved for BT_HOST_WAKE	44	GND
45	LPO_32Khz	32.768kHz output for wifi/bt module	46	MIPI_CSI0_D0N	MIPI CSI data0
47	GND		48	MIPI_CSI0_D0P
49	MDI0_P	GbE MDI signals	50	GND
51	MDI0_N		52	MIPI_CSI0_D1N	MIPI CSI data1
53	MDI1_P		54	MIPI_CSI0_D1P
55	MDI1_N		56	GND
57	GND		58	/NC
59	MDI2_P	GbE MDI signals	60	/NC
61	MDI2_N		62	GND
63	MDI3_P		64	/NC
65	MDI3_N		66	/NC
67	GND		68	GND
69	SPEED_LED	GbE SPEED LED signal output	70	/NC
71	LINK_LED	GbE LINK LED signal output	72	/NC
Connector Key
73	GND		74	TP_INT(GPIOC16)	I2C signal, connect to touch controller
75	USB_DM4	USB 2.0 host data signal	76	TP_SDA(I2C2_SDA)
77	USB_DP4		78	TP_SCL(I2C2_SCL)
79	GND		80	OneWire(GPIOC15)	GPIOC15, used as FriendlyElec LCD OneWire signal
81	USB_DM3	USB 2.0 host data signal	82	GND
83	USB_DP3		84	LCD_CLK	RGB LCD Clock signal
85	GND		86	GND
87	USB_DM2	USB 2.0 host data signal	88	LCD_HSYNC	RGB LCD horizontal synchronization
89	USB_DP2		90	LCD_VSYNC	RGB LCD vertical synchronization
91	GND		92	LCD_DE	signal the external LCD that data is valid on the data bus
93	/NC		94	GND
95	/NC		96	LCD_R0	RGB LCD Red data signals
97	GND		98	LCD_R1
99	USB_OTG_D-	USB 2.0 OTG data signal	100	LCD_R2
101	USB_OTG_D+		102	LCD_R3
103	USB_OTG_ID	USB 2.0 OTG ID signal	104	LCD_R4
105	VBUS	USB 2.0 OTG VBUS	106	LCD_R5
107	VBUS_DRIVE(/NC)	Reserved for USB 2.0 OTG VBUS Power Drive Signal	108	LCD_R6
109	HDMI_HPD	HDMI Hot plug detect	110	LCD_R7
111	I2C1_SDA	I2C1, used as HDMI DDC signal	112	GND
113	I2C1_SCL		114	LCD_G0	RGB LCD Green data signals
115	HDMI_CEC	HDMI CEC Signal	116	LCD_G1
117	GND		118	LCD_G2
119	HDMI_TXCN	HDMI Clock and data signals	120	LCD_G3
121	HDMI_TXCP		122	LCD_G4
123	GND		124	LCD_G5
125	HDMI_TX0N		126	LCD_G6
127	HDMI_TX0P		128	LCD_G7
129	GND		130	GND
131	HDMI_TX1N		132	LCD_B0	RGB LCD Blue data signals
133	HDMI_TX1P		134	LCD_B1
135	GND		136	LCD_B2
137	HDMI_TX2N		138	LCD_B3
139	HDMI_TX2P		140	LCD_B4
141	GND		142	LCD_B5
143	USB_DM1	USB 2.0 data signal	144	LCD_B6
145	USB_DP1		146	LCD_B7
147	GND		148	GND
149	/NC		150	LVDS_Y3M	LVDS signals
151	/NC		152	LVDS_Y3P
153	GND		154	GND
155	/NC		156	LVDS_CLKM
157	/NC		158	LVDS_CLKP
159	GND		160	GND
161	GPIOB31	GPIOs	162	LVDS_Y2M
163	GPIOB30		164	LVDS_Y2P
165	GPIOC7		166	GND
167	GPIOC8		168	LVDS_Y1M
169	GPIOB23		170	LVDS_Y1P
171	GPIOC2		172	GND
173	GPIOC13/PWM1	PWMs	174	LVDS_Y0M
175	GND		176	LVDS_Y0P
177	GPIOC14/PWM2		178	GND
179	GPIOD1/PWM0		180	SPI0_CLK/GPIOC29	SPI
181	I2C2_SDA	I2Cs	182	SPI0_MOSI/GPIOC31
183	I2C2_SCL		184	SPI0_MISO/GPIOD0
185	I2C0_SDA		186	SPI0_CS/GPIOC30
187	I2C0_SCL		188	GPIOD8/PPM
189	GPIOB27/HP_DETECT	GPIOB27, used as Headphone insert detect	190	UART4_TX/GPIOB29	UARTs
191	AUDIO_GND	Headphone output return path	192	UART4_RX/GPIOB28
193	HP_R	Headphone output R	194	UART3_RX/GPIOD17
195	HP_L	Headphone output L	196	UART3_TX/GPIOD21
197	LINEOUT_R(HP_R)	Internal connect to HP_R, reserved for line out R in the future	198	UART2_RX
199	LINEOUT_L(HP_L)	Internal connect to HP_L, reserver for line out L in the future	200	UART2_TX
201	MICIN_N	Microphone input N	202	UART0_RX	Used as Debug console
203	MICIN_P	Microphone input P	204	UART0_TX

Note:

All VDD_5V Must be connected to get the lowest connection resistance.

All GND Must be connected for good EMC performance and system stability.

A 4-layer PCB carrier board is highly recommended.

For more details refer to the document: SOM-4418-2005-Schematic.pdf

4.2 Board Dimension

SOM-4418 Dimensions

For more details refer to the document: SOM-4418_2005_dxf.zip

5 Notes in Hardware Design

5.1 EEPROM

• The board has an EEPROM(model: 24AA025E48T-I/OT) with a unique MAC. This EEPROM is connected to I2C0 and its address is 0x51 therefore some EEPROM chips cannot be connected to I2C0 which will cause conflicts of addresses.
• In our tests these EEPROM chips cannot be connected to I2C0: 24C04, 24C08 and 24C16. There chips which we tested can be connected to I2C0: 24C01, 24C02 and 24C256
• For more details about EEPROM address issues refer to http://www.onsemi.com/pub_link/Collateral/CAT24C01-D.PDF

6 Schematics & Mechanical drawing

• PCB Dimension(SOM-4418_2005_dxf.zip)
• Schematic(SOM-4418-2005-Schematic.pdf)
• S5P4418 Datasheet (S5P4418_Datasheet_0.1.pdf)