115 lines
3.8 KiB
Markdown
115 lines
3.8 KiB
Markdown
## Block Diagram
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### Helios4 Carrier Board
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### A388 System-On-Chip
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## Connector / Interface List
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Name |Peripheral Type|Connector Type|Details
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CON2|Serial port|Micro-USB Connector|Via onboard FTDI USB-to-UART0 bridge
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*J8*|*RC Battery*|*Not populated*|*External battery source for RTC clock*
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J9|I2C|4x1 Pin Male Header|I2C Channel 1
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J10|Fan|4x1 Pin Male Header|PWM and RPM support
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J12|GPIO|7x2 Pin Male Header|GPIO configurable as input or output<br>Via IO Expander on I2C Channel 0
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*J13*|*Serial port*|*Not populated*|*SoM UART0 interface*
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J14|HDD Power|Molex 4-Pin Female|Rated for 2x HDD
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J15|LAN|RJ45|Gigabit Ethernet
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J16|DC connector|Kycon 4-Pin Mini-DIN|DC input 12V / 8A
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J17|Fan|4x1 Pin Male Header|PWM and RPM support
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J18|LED Panel|5x2 Pin Male Header|Expansion port of on-board LED
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J19|HDD Power|Molex 4-Pin Female|Rated for 2x HDD
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SW1|Boot Mode|Dip Switch|Boot mode selector :<br> SPI,MMC,UART,SATA
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SW2|LED Mode|Dip Switch|LED mode selection :<br> board or expansion panel
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U3|microSD|Push-Push card connector|Support SDHC and SDXC
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U4|USB 3.0|Dual Port USB3.0|Type A
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U16|Reset|Push Button|CPU Reset
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U10|SATA|SATA 3.0|Port 0 (SATA1)
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U11|SATA|SATA 3.0|Port 1 (SATA2)
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U12|SATA|SATA 3.0|Port 2 (SATA3)
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U13|SATA|SATA 3.0|Port 3 (SATA4)
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## Boot Modes
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Helios4 supports 4 boot modes that can be chosen by using the dipswitch SW1.
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All the ready-to-use images we provide are for the **SD Card** boot mode.
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Please refer to [U-boot](/uboot) section to know how to use the other modes.
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## LED indicators
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LED Name|Color|Description
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LED1|green|System heartbeat
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LED2|red|Error status
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LED3|green|SATA1 activity
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LED4|green|SATA2 activity
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LED5|green|SATA3 activity
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LED6|green|SATA4 activity
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LED7|green|USB activity
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LED8|green|Power indicator
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Helios4 board was designed to either use the on-board LEDs or use an expansion panel (not-available). To use the on-board LEDs insure to switch to ON the dipswitch SW2.
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## Reset Button
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Helios4 board provides a RESET push button (U16) to hard reset the SoC (System-On-Chip).
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!!! Important
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This button only resets the SoC and not the overall board. For instance it won't reset the HDD.
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## I2C Interface
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Helios4 board exposes on header J9 the SoC I2C channel 1. Below is the header pin-out, the little arrow on the PCB indicates the ground pin.
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## HDD Recommendation List
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We recommend HDD which are designed for NAS (Network Attached Storage). Those NAS HDD are specially conceived for reliable 24/7 operation and offers lower power consumption and dissipation, less vibration and noise, and finally better warranty. We recommend the following models :
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**Western Digital** : WD Red NAS (1, 2, 3, 4, 6, 8 and 10TB)
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- WD10EFRX
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- WD20EFRX
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- WD30EFRX
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- WD40EFRX
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- WD60EFRX
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- WD80EFZX
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- WD100EFAX
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**Seagate** : IronWolf NAS (1, 2, 3, 4, 6, 8 and 10TB)
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- ST1000VN002
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- ST2000VN004
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- ST3000VN007
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- ST4000VN008
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- ST6000VN0041
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- ST8000VN0022
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- ST10000VN0004
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**HGST** : Deskstar NAS (4, 6 and 8TB)
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- 0S04005
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- 0S04007
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- 0S04012
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!!! note
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We recommend to order from different shop to avoid having all the drives from the same factory batch. For instance, you should order 2x HDDs from one shop, then the 2 others from another shop.
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## HDD / SSD Compability List
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Please refer to [Synology DS416j Compatibility List](https://www.synology.com/en-global/compatibility?search_by=products&model=DS416j&category=hdds&p=1) that covers a large number of tested drives. The DS416j used the same SoC family than Helios4.
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