System Overview

The Ports & I/O Subsystem defines all physical and logical interfaces for video, audio, data, control, networking, and service connectivity. Engineered for universal compatibility and long‑term stability, it enables seamless integration with external devices, media systems, networks, and smart building infrastructure.

• Universal connectivity
• High‑speed data throughput
• Stable electrical integrity
• Compliance with international standards
• Firmware‑level autodetection and diagnostics

Port Bay Assembly

• Location: Bottom‑Right Rear Panel
• Configuration: Horizontal port cluster
• Dimensions: 70 mm × 30 mm

Ports Included

• HDMI 2.1 (eARC) ×3
• USB‑A 3.0 ×2
• USB‑C (SPort) ×1
• Ethernet RJ45 ×1
• Optical TOSLINK ×1
• Audio Out (3.5 mm TRS) ×1
• AC IN (230V NZ) ×1

Port Specifications

Interface Highlights

• Full HDMI 2.1 with eARC and HDR support
• High‑speed USB for external storage and accessories
• SPort for display, data, and firmware update
• Optical and analog audio outputs
• Gigabit Ethernet for stable networking

HDMI 2.1 Interface Details

• 8K @ 60 Hz / 4K @ 120 Hz
• HDR10 / HDR10+ / Dolby Vision
• HDCP 2.3
• 48 Gbps bandwidth
• CEC device control

Electrical Characteristics

• Differential impedance: 100 Ω ±10%
• ESD protection: ±15 kV (Air), ±8 kV (Contact)
• Surge protection: IEC 61000‑4‑5 compliant

USB Interfaces

USB‑A 3.0 (×2)

• Speed: 5 Gbps
• Output: 5V / 0.9A
• Function: External media, peripherals

USB‑C (SPort)

• Standard: USB 3.2 Gen2
• Speed: 10 Gbps
• Mode: DisplayPort 1.4 Alt Mode
• Output: 5V / 3A
• Function: Display, data, firmware update

Network & Audio Interfaces

Ethernet RJ45

• Standard: IEEE 802.3
• Speed: 1000 Mbps
• Mode: Auto MDI/MDIX

Optical TOSLINK

• Format: S/PDIF
• Output: PCM, Dolby, DTS up to 96 kHz

Audio Out (3.5 mm TRS)

• Output: 2 Vrms
• Function: Headphones / external speakers

Control & Sensing I/O

• Service USB: USB 3.2 — firmware update
• Light Sensor: Digital I/O — auto brightness
• GPIO Expansion: Digital I/O — diagnostics / expansion

Connection Topology

Electrical & Signal Integrity

Protection Systems

• ESD: ±15 kV (Air), ±8 kV (Contact)
• Surge: IEC 61000‑4‑5 compliant
• EMI/RFI shielding: multilayer metal enclosure
• Signal isolation from PSU grounding
• Single‑point safety earth

Signal Integrity

• HDMI 2.1 eye diagram verified 0–500 ps
• Crosstalk < −30 dB
• Return loss < −15 dB

Standards & Compliance

• HDMI 2.1 Specification
• USB 3.2 Specification
• IEEE 802.3 Ethernet
• CE / FCC
• RoHS Compliant

Certifications Required

• CE Mark
• FCC Part 15
• RoHS Directive 2011/65/EU
• IEC 60950‑1 Safety Standard

Firmware Integration

Software Layers

• Application Layer
• Core Services
• HAL (Display / Audio / Network)
• Drivers (HDMI / USB / Ethernet / Audio)

Functional Features

• Auto device detection
• CEC control
• Network failover
• Remote diagnostics
• Hotplug detection
• Firmware update via OTA and SPort

Test & Quality Assurance

• HDMI 2.1 bandwidth test
• USB read/write stress test
• Network throughput test
• Optical & analog audio signal test
• Hotplug compatibility test
• ESD & surge test
• 24‑hour stability burn‑in
• Firmware update test (OTA & SPort)

Acceptance Criteria

• No signal loss at max throughput
• No thermal degradation
• No ESD failure
• All ports pass functional test

Key Benefits

• Wide compatibility with all major devices
• High‑speed connectivity
• Stable network performance
• Flexible audio options
• Serviceable and future‑ready design
• Maximum safety and reliability

Design Requirements

• Full interoperability with external devices
• Stable electrical performance
• Compliance with safety and EMI standards
• Firmware‑level integration with mainboard CPU
• Easy service access and modular replacement