Difference between revisions of "SOM-4418"

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Line 16: Line 16:
 
* Audio: Build in Codec, 2-Chanel headphone output, one Microphone input
 
* Audio: Build in Codec, 2-Chanel headphone output, one Microphone input
 
* USB: 4 x USB 2.0 Host, 1 x USB 2.0 OTG
 
* USB: 4 x USB 2.0 Host, 1 x USB 2.0 OTG
−
* GPIO: 13 x GPIOs, 3 x I2Cs, 1 x SPI, 5 x UART, 3 x PWM, 2 x SDIOs
+
* 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
 
* LED: 1 x power LED , 1 x SYS LED
 
* Other Resource: 1 x onboard thermistor
 
* Other Resource: 1 x onboard thermistor
Line 43: Line 43:
 
| 1
 
| 1
 
| style="color:#fe0000;" | VDD_5V
 
| style="color:#fe0000;" | VDD_5V
−
|  
+
| rowspan="3" | 4.7~5.5V Power Suply input
 
| 2
 
| 2
 
| style="color:#fe0000;" | VDD_5V
 
| style="color:#fe0000;" | VDD_5V
−
|  
+
| rowspan="3" | 4.7~5.5V Power Suply input
 
|-
 
|-
 
| 3
 
| 3
 
| style="color:#fe0000;" | VDD_5V
 
| style="color:#fe0000;" | VDD_5V
−
|
 
 
| 4
 
| 4
 
| style="color:#fe0000;" | VDD_5V
 
| style="color:#fe0000;" | VDD_5V
−
|
 
 
|-
 
|-
 
| 5
 
| 5
 
| style="color:#fe0000;" | VDD_5V
 
| style="color:#fe0000;" | VDD_5V
−
|
 
 
| 6
 
| 6
 
| style="color:#fe0000;" | VDD_5V
 
| style="color:#fe0000;" | VDD_5V
−
|
 
 
|-
 
|-
 
| 7
 
| 7
Line 74: Line 70:
 
| 10
 
| 10
 
| style="color:#fe0000;" | VRTC_IN
 
| style="color:#fe0000;" | VRTC_IN
−
|  
+
| RTC backup battery（3V）input，backup current is 3.5uA
 
|-
 
|-
 
| 11
 
| 11
 
| style="color:#fe0000;" | VCC_WIFI_IO(3.3V)
 
| style="color:#fe0000;" | VCC_WIFI_IO(3.3V)
−
|  
+
| MMC1 IO reference power，connect to wifi module IO power input
 
| 12
 
| 12
 
| style="color:#fe0000;" | VCC_IO(3.3V)
 
| style="color:#fe0000;" | VCC_IO(3.3V)
−
|  
+
| 3.3V out for IO reference
 
|-
 
|-
 
| 13
 
| 13
 
| MMC1_D0
 
| MMC1_D0
−
|  
+
| rowspan="5" | SDIO1/MMC1, connect to wifi module
 
| 14
 
| 14
 
| BOOT_CS
 
| BOOT_CS
−
|  
+
| Pull low this pin to boot from SD CARD on MMC0
 
|-
 
|-
 
| 15
 
| 15
 
| MMC1_D1
 
| MMC1_D1
−
|
 
 
| 16
 
| 16
 
| PWRKEY
 
| PWRKEY
−
|  
+
| Power key
 
|-
 
|-
 
| 17
 
| 17
 
| MMC1_D2
 
| MMC1_D2
−
|
 
 
| 18
 
| 18
 
| NRESETIN
 
| NRESETIN
−
|  
+
| Hard reset input
 
|-
 
|-
 
| 19
 
| 19
 
| MMC1_D3
 
| MMC1_D3
−
|
 
 
| 20
 
| 20
 
| AliveGPIO3
 
| AliveGPIO3
−
|  
+
| GPIO, reserved for RecoveryKey
 
|-
 
|-
 
| 21
 
| 21
 
| MMC1_CMD
 
| MMC1_CMD
−
|
 
 
| 22
 
| 22
 
| EXT_PWR_CTRL
 
| EXT_PWR_CTRL
−
|  
+
| Used this pin to control power on/off of the carrier
 
|-
 
|-
 
| 23
 
| 23
Line 123: Line 115:
 
| 24
 
| 24
 
| MMC0_D0
 
| MMC0_D0
−
|  
+
| rowspan="7" | SDIO0/MMC0, for SD Card
 
|-
 
|-
 
| 25
 
| 25
 
| MMC1_CLK
 
| MMC1_CLK
−
|  
+
| SDIO1 Clock Out
 
| 26
 
| 26
 
| MMC0_D1
 
| MMC0_D1
−
|
 
 
|-
 
|-
 
| 27
 
| 27
 
| WL_REG_ON(GPIOB24)
 
| WL_REG_ON(GPIOB24)
−
|  
+
| GPIOB24, Used as wifi power on control signal
 
| 28
 
| 28
 
| MMC0_D2
 
| MMC0_D2
−
|
 
 
|-
 
|-
 
| 29
 
| 29
 
| WL_HOST_WAKE(GPIOC17)
 
| WL_HOST_WAKE(GPIOC17)
−
|  
+
| GPIOC17, Used as wifi wake-up signal
 
| 30
 
| 30
 
| MMC0_D3
 
| MMC0_D3
−
|
 
 
|-
 
|-
 
| 31
 
| 31
 
| UART1_TX
 
| UART1_TX
−
|  
+
| rowspan="4" | UART1, connect to bluetooth module
 
| 32
 
| 32
 
| MMC0_CMD
 
| MMC0_CMD
−
|
 
 
|-
 
|-
 
| 33
 
| 33
 
| UART1_RX
 
| UART1_RX
−
|
 
 
| 34
 
| 34
 
| MMC0_CD
 
| MMC0_CD
−
|
 
 
|-
 
|-
 
| 35
 
| 35
 
| UART1_nCTS
 
| UART1_nCTS
−
|
 
 
| 36
 
| 36
 
| MMC0_CLK
 
| MMC0_CLK
−
|
 
 
|-
 
|-
 
| 37
 
| 37
 
| UART1_nRTS
 
| UART1_nRTS
−
|
 
 
| 38
 
| 38
 
| style="color:#00009B;" | GND
 
| style="color:#00009B;" | GND
Line 176: Line 159:
 
| 39
 
| 39
 
| BT_RST_N(GPIOB8)
 
| BT_RST_N(GPIOB8)
−
|  
+
| GPIOB8, Used as bluetooth reset
 
| 40
 
| 40
 
| MIPI_CSI0_CLKN
 
| MIPI_CSI0_CLKN
−
|  
+
| rowspan="2" | MIPI CSI Clock
 
|-
 
|-
 
| 41
 
| 41
 
| BT_WAKE
 
| BT_WAKE
−
|  
+
| bluetooth wake-up signal
 
| 42
 
| 42
 
| MIPI_CSI0_CLKP
 
| MIPI_CSI0_CLKP
−
|
 
 
|-
 
|-
 
| 43
 
| 43
−
| BT_HOST_WAKE
+
| BT_HOST_WAKE(/NC)
−
|  
+
| Reserved for BT_HOST_WAKE
 
| 44
 
| 44
 
| style="color:#00009B;" | GND
 
| style="color:#00009B;" | GND
Line 197: Line 179:
 
| 45
 
| 45
 
| LPO_32Khz
 
| LPO_32Khz
−
|  
+
| 32.768kHz output for wifi/bt module
 
| 46
 
| 46
 
| MIPI_CSI0_D0N
 
| MIPI_CSI0_D0N
−
|  
+
| rowspan="2" | MIPI CSI data0
 
|-
 
|-
 
| 47
 
| 47
Line 207: Line 189:
 
| 48
 
| 48
 
| MIPI_CSI0_D0P
 
| MIPI_CSI0_D0P
−
|
 
 
|-
 
|-
 
| 49
 
| 49
 
| MDI0_P
 
| MDI0_P
−
|  
+
| rowspan="4" | GbE MDI signals
 
| 50
 
| 50
 
| style="color:#00009B;" | GND
 
| style="color:#00009B;" | GND
Line 218: Line 199:
 
| 51
 
| 51
 
| MDI0_N
 
| MDI0_N
−
|
 
 
| 52
 
| 52
 
| MIPI_CSI0_D1N
 
| MIPI_CSI0_D1N
−
|  
+
| rowspan="2" | MIPI CSI data1
 
|-
 
|-
 
| 53
 
| 53
 
| MDI1_P
 
| MDI1_P
−
|
 
 
| 54
 
| 54
 
| MIPI_CSI0_D1P
 
| MIPI_CSI0_D1P
−
|
 
 
|-
 
|-
 
| 55
 
| 55
 
| MDI1_N
 
| MDI1_N
−
|
 
 
| 56
 
| 56
 
| style="color:#00009B;" | GND
 
| style="color:#00009B;" | GND
Line 246: Line 223:
 
| 59
 
| 59
 
| MDI2_P
 
| MDI2_P
−
|  
+
| rowspan="4" | GbE MDI signals
 
| 60
 
| 60
 
| /NC
 
| /NC
Line 253: Line 230:
 
| 61
 
| 61
 
| MDI2_N
 
| MDI2_N
−
|
 
 
| 62
 
| 62
 
| style="color:#00009B;" | GND
 
| style="color:#00009B;" | GND
Line 260: Line 236:
 
| 63
 
| 63
 
| MDI3_P
 
| MDI3_P
−
|
 
 
| 64
 
| 64
 
| /NC
 
| /NC
Line 267: Line 242:
 
| 65
 
| 65
 
| MDI3_N
 
| MDI3_N
−
|
 
 
| 66
 
| 66
 
| /NC
 
| /NC
Line 281: Line 255:
 
| 69
 
| 69
 
| SPEED_LED
 
| SPEED_LED
−
|  
+
| GbE SPEED LED signal output
 
| 70
 
| 70
 
| /NC
 
| /NC
Line 288: Line 262:
 
| 71
 
| 71
 
| LINK_LED
 
| LINK_LED
−
|  
+
| GbE LINK LED signal output
 
| 72
 
| 72
 
| /NC
 
| /NC
Line 297: Line 271:
  
 
|-
 
|-
 +
| 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 L
 +
| 204
 +
| UART0_TX
 
|}
 
|}
 
:'''Note:'''
 
:'''Note:'''

Revision as of 08:44, 1 July 2020

查看中文

1 Introduction

Overview
Front
Back

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, 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℃

3 Software Features

4 Diagram, Layout and Dimension

4.1 Layout

File:SOM-4418-IF.png
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 L 204 UART0_TX
Note:
  1. For more details refer to the document: []

4.2 Board Dimension

SOM-4418 Dimensions

For more details refer to the document: []

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

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