View source for SOM-4418/zh

[[SOM-4418|English]]

==介绍==
[[File:SOM-4418-1B.jpg|thumb|Overview]]
[[File:SOM-4418-A1.jpg|thumb|Front]]
[[File:SOM-4418-B1.jpg|thumb|Back]]
* SOM-4418是基于三星四核Cortex-A9 S5P4418 SoC设计的核心板， 主频高达1.4GHz，具有8G eMMC, 1GB 32bit-DDR3内存, 集成千兆以太网和音频IC。 
* SOM-4418具有LVDS和RGB-LCD显示接口, 支持电阻触摸和电容触摸。
* SOM-4418也具有其它常用接口，如USB HOST, UART, I2C, SPI, PWM, GPIO等。

==硬件特性==
* 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， RTC
* 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℃

==Software Features==

==硬件描述==
===Layout===
[[File:SOM-4418-IF.jpg |thumb|600px|SOM-4418 Layout]]
* '''204 Pin Spec'''
**Socket Type：0.6mm Pitch 204-Pin '''Standard Type''' DDR3 SODIMM Socket
::{| class="wikitable" 
|- style="font-weight:bold;"
! style="color:#000000;" | Pin#
! Name
! Description
! Pin#
! Name
! Description
|-
| 1
| style="color:#fe0000;" | VDD_5V
| rowspan="3" | 4.7~5.5V Power Suply input
| 2
| style="color:#fe0000;" | VDD_5V
| rowspan="3" | 4.7~5.5V Power Suply input
|-
| 3
| style="color:#fe0000;" | VDD_5V
| 4
| style="color:#fe0000;" | VDD_5V
|-
| 5
| style="color:#fe0000;" | VDD_5V
| 6
| style="color:#fe0000;" | VDD_5V
|-
| 7
| style="color:#00009b;" | GND
| 
| 8
| style="color:#00009b;" | GND
| 
|-
| 9
| style="color:#00009b;" | GND
| 
| 10
| style="color:#fe0000;" | VRTC_IN
| RTC backup battery（3V）input，backup current is 3.5uA
|-
| 11
| style="color:#fe0000;" | VCC_WIFI_IO(3.3V)
| MMC1 IO reference power，connect to wifi module IO power input
| 12
| style="color:#fe0000;" | VCC_IO(3.3V)
| 3.3V out for IO reference
|-
| 13
| MMC1_D0
| rowspan="5" | 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
| style="color:#00009b;" | GND
| 
| 24
| MMC0_D0
| rowspan="7" | 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
| rowspan="4" | UART1, connect to bluetooth module
| 32
| MMC0_CMD
|-
| 33
| UART1_RX
| 34
| MMC0_CD
|-
| 35
| UART1_nCTS
| 36
| MMC0_CLK
|-
| 37
| UART1_nRTS
| 38
| style="color:#00009B;" | GND
| 
|-
| 39
| BT_RST_N(GPIOB8)
| GPIOB8, Used as bluetooth reset
| 40
| MIPI_CSI0_CLKN
| rowspan="2" | 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
| style="color:#00009B;" | GND
| 
|-
| 45
| LPO_32Khz
| 32.768kHz output for wifi/bt module
| 46
| MIPI_CSI0_D0N
| rowspan="2" | MIPI CSI data0
|-
| 47
| style="color:#00009b;" | GND
| 
| 48
| MIPI_CSI0_D0P
|-
| 49
| MDI0_P
| rowspan="4" | GbE MDI signals
| 50
| style="color:#00009B;" | GND
| 
|-
| 51
| MDI0_N
| 52
| MIPI_CSI0_D1N
| rowspan="2" | MIPI CSI data1
|-
| 53
| MDI1_P
| 54
| MIPI_CSI0_D1P
|-
| 55
| MDI1_N
| 56
| style="color:#00009B;" | GND
| 
|-
| 57
| style="color:#00009B;" | GND
| 
| 58
| /NC
| 
|-
| 59
| MDI2_P
| rowspan="4" | GbE MDI signals
| 60
| /NC
| 
|-
| 61
| MDI2_N
| 62
| style="color:#00009B;" | GND
| 
|-
| 63
| MDI3_P
| 64
| /NC
| 
|-
| 65
| MDI3_N
| 66
| /NC
| 
|-
| 67
| style="color:#00009B;" | GND
| 
| 68
| style="color:#00009B;" | GND
| 
|-
| 69
| SPEED_LED
| GbE SPEED LED signal output
| 70
| /NC
| 
|-
| 71
| LINK_LED
| GbE LINK LED signal output
| 72
| /NC
| 
|-
| colspan="6" | Connector Key
|-
| 73
| style="color:#00009B;" | GND
| 
| 74
| TP_INT(GPIOC16)
| rowspan="3" | I2C signal, connect to touch controller
|-
| 75
| USB_DM4
| rowspan="2" | USB 2.0 host data signal
| 76
| TP_SDA(I2C2_SDA)
|-
| 77
| USB_DP4
| 78
| TP_SCL(I2C2_SCL)
|-
| 79
| style="color:#00009B;" | GND
| 
| 80
| OneWire(GPIOC15)
| GPIOC15, used as FriendlyElec LCD OneWire signal
|-
| 81
| USB_DM3
| rowspan="2" | USB 2.0 host data signal
| 82
| style="color:#00009B;" | GND
| 
|-
| 83
| USB_DP3
| 84
| LCD_CLK
| RGB LCD Clock signal
|-
| 85
| style="color:#00009B;" | GND
| 
| 86
| style="color:#00009B;" | GND
| 
|-
| 87
| USB_DM2
| rowspan="2" | USB 2.0 host data signal
| 88
| LCD_HSYNC
| RGB LCD horizontal synchronization
|-
| 89
| USB_DP2
| 90
| LCD_VSYNC
| RGB LCD vertical synchronization
|-
| 91
| style="color:#00009B;" | GND
| 
| 92
| LCD_DE
| signal the external LCD that data is valid on the data bus
|-
| 93
| /NC
| 
| 94
| style="color:#00009B;" | GND
| 
|-
| 95
| /NC
| 
| 96
| LCD_R0
| rowspan="8" | RGB LCD Red data signals
|-
| 97
| style="color:#00009B;" | GND
| 
| 98
| LCD_R1
|-
| 99
| USB_OTG_D-
| rowspan="2" | 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
| rowspan="2" | I2C1, used as HDMI DDC signal
| 112
| style="color:#00009B;" | GND
| 
|-
| 113
| I2C1_SCL
| 114
| LCD_G0
| rowspan="8" | RGB LCD Green data signals
|-
| 115
| HDMI_CEC
| HDMI CEC Signal
| 116
| LCD_G1
|-
| 117
| style="color:#00009B;" | GND
| 
| 118
| LCD_G2
|-
| 119
| HDMI_TXCN
| rowspan="11" | HDMI Clock and data signals
| 120
| LCD_G3
|-
| 121
| HDMI_TXCP
| 122
| LCD_G4
|-
| 123
| style="color:#00009B;" | GND
| 124
| LCD_G5
|-
| 125
| HDMI_TX0N
| 126
| LCD_G6
|-
| 127
| HDMI_TX0P
| 128
| LCD_G7
|-
| 129
| style="color:#00009B;" | GND
| 130
| style="color:#00009B;" | GND
| 
|-
| 131
| HDMI_TX1N
| 132
| LCD_B0
| rowspan="8" | RGB LCD Blue data signals
|-
| 133
| HDMI_TX1P
| 134
| LCD_B1
|-
| 135
| style="color:#00009B;" | GND
| 136
| LCD_B2
|-
| 137
| HDMI_TX2N
| 138
| LCD_B3
|-
| 139
| HDMI_TX2P
| 140
| LCD_B4
|-
| 141
| style="color:#00009B;" | GND
| 
| 142
| LCD_B5
|-
| 143
| USB_DM1
| rowspan="2" | USB 2.0 data signal
| 144
| LCD_B6
|-
| 145
| USB_DP1
| 146
| LCD_B7
|-
| 147
| style="color:#00009B;" | GND
| 
| 148
| style="color:#00009B;" | GND
| 
|-
| 149
| /NC
| 
| 150
| LVDS_Y3M
| rowspan="14" | LVDS signals
|-
| 151
| /NC
| 
| 152
| LVDS_Y3P
|-
| 153
| style="color:#00009B;" | GND
| 
| 154
| style="color:#00009B;" | GND
|-
| 155
| /NC
| 
| 156
| LVDS_CLKM
|-
| 157
| /NC
| 
| 158
| LVDS_CLKP
|-
| 159
| style="color:#00009B;" | GND
| 
| 160
| style="color:#00009B;" | GND
|-
| 161
| GPIOB31
| rowspan="6" | GPIOs
| 162
| LVDS_Y2M
|-
| 163
| GPIOB30
| 164
| LVDS_Y2P
|-
| 165
| style="color:#000000;" | GPIOC7
| 166
| style="color:#00009B;" | GND
|-
| 167
| GPIOC8
| 168
| LVDS_Y1M
|-
| 169
| GPIOB23
| 170
| LVDS_Y1P
|-
| 171
| GPIOC2
| 172
| style="color:#00009B;" | GND
|-
| 173
| GPIOC13/PWM1
| rowspan="4" | PWMs
| 174
| LVDS_Y0M
|-
| 175
| style="color:#00009B;" | GND
| 176
| LVDS_Y0P
|-
| 177
| GPIOC14/PWM2
| 178
| style="color:#00009B;" | GND
| 
|-
| 179
| GPIOD1/PWM0
| 180
| SPI0_CLK/GPIOC29
| rowspan="4" | SPI
|-
| 181
| I2C2_SDA
| rowspan="4" | I2Cs
| 182
| SPI0_MOSI/GPIOC31
|-
| 183
| I2C2_SCL
| 184
| style="color:#000000;" | 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
| rowspan="6" | UARTs
|-
| 191
| style="color:#00009B;" | 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
| rowspan="2" | Used as Debug console
|-
| 203
| MICIN_P
| Microphone input P
| 204
| UART0_TX
|}
:'''Note:'''
::所有VDD_5V必须连接以获得最低的连接电阻。
::必须连接所有GND，以实现良好的EMC性能和系统稳定性。
:: 强烈建议使用4层PCB底板。
:: 原理图 [http://wiki.friendlyarm.com/wiki/images/8/88/SOM-4418-2005-Schematic.pdf SOM-4418-2005-Schematic.pdf]

==参考设计==
:: [[Edge-RT300]]
[[File:Edge-RT300-Overview.jpg|600px|Edge-RT300]]

==硬件设计注意事项==
===EEPROM===
*因为Smart4418核心板上的集成了带MAC地址的EEPROM, 型号为24AA025E48T-I/OT, 接在I2C0上, 设备地址为0x51, 所以有些型号的EEPROM不能接在I2C0上, 否则会地址冲突.
*不能接在I2C0上的EEPROM: 24C04, 24C08, 24C16, 可以接在I2C0上的EEPROM:24C01, 24C02, 24C256
*关于EEPROM地址问题, 请看 http://www.onsemi.com/pub_link/Collateral/CAT24C01-D.PDF

==快速入门==
===准备工作===
刷机前请先准备好以下硬件
* SOM-4418核心板+[[Edge-RT300]]底板
* TF卡: Class10或以上的8GB小卡
* 一个DC接口的外接电源，要求输出为12V/2A
* 可选购LCD配件HD702V
* 可选连接一套USB键盘鼠标，同时连接还需要USB HUB
* 如果需要开发与编译，则需要一台可以联网的电脑，推荐使用Ubuntu 18.04 64位系统
{{S5P4418BootFromSDCard/zh|SOM-4418}}
{{BurnOSToEMMC/zh|SOM-4418|s5p4418-eflasher}}
{{S5PXX18MakeSDCardViaSDFusing/zh|SOM-4418|sd-fuse_s5p4418}}
{{ResizeTFCardFS/zh|SOM-4418}}
{{S5Pxx18HDMI/zh|SOM-4418|arch/arm/plat-s5p4418/nanopi2/lcds.c}}
{{S5Pxx18MofidyKernelCommandLineOnHostPC/zh|SOM-4418|sd-fuse_s5p4418}}
{{NanoPCStartToUse/zh|SOM-4418}}
{{FriendlyCoreGeneral/zh|SOM-4418}}
{{FriendlyCoreRunX11Application/zh|SOM-4418}}
{{FriendlyCoreS5Pxx18/zh|SOM-4418}}
{{UbuntuXenial-Armhf-Install-Docker/zh|SOM-4418}}
{{S5Pxx18Android/zh|SOM-4418}}
{{MoreOS/zh}}
{{S5P4418BuildFromSource/zh|SOM-4418}}
{{S5P4418-KernelHeaderFile/zh|SOM-4418}}
{{S5Pxx18ExternalModules/zh|SOM-4418}}
{{S5Pxx18AccessHWUnderAndroid/zh|SOM-4418}}
{{S5Pxx18ConnectToLCDModules/zh|SOM-4418}}
{{S5Pxx18HWfiles/zh|SOM-4418}}
{{S5P4418Resources/zh|SOM-4418}}
{{DownloadUrl/zh|SOM-4418}}
{{TechSupport/zh|SOM-4418}}
{{S5Pxx18HWfiles|SOM-4418}}
{{S5P4418ChangeLog/zh}}