RTLPlayground/doc/devices/PCB-AFGW_SWTG218ANS_V2.0.2.md

PCB-AFGW SWTG218ANS V2.0.2

RTL8373-based 8×2.5G PoE + 1×10G SFP+ web-managed switch, sold as the RealHD PSW8-25MG.

Label specifications

• Manufacturer: RealHD
• Model: PSW8-25MG
• PCB marking: PCB-AFGW SWTG218ANS_V2.0.2 (silkscreened as PCB-AFGW SWTG218ANS_V2.0.2_23308)
• Ports:
  • 8 × RJ45: 10/100/1000/2500 Mbps with PoE
  • 1 × SFP+: 1G / 2.5G / 10G (front panel marking 9(10G))
• Power input: internal AC PSU, 100-240V~ 50/60Hz 2A MAX, DC output 53.5V 2.8A 150W
• Front panel LEDs: PWR, SYS, per RJ45 port Link/Act and PoE, per SFP port 2.5G (green) and 10G (blue)
• Stock firmware defaults: web-managed PoE switch

What works

• All eight 2.5GBASE-T RJ45 ports at 10/100/1000/2500 Mbps (PoE is not configurable via RTLPlayground)
• SFP+ port supporting 1G, 2.5G and 10G modules
• LEDs: green (2.5G) and amber (1G/100M/10M) per RJ45 port with activity, green (1G/2.5G) and blue (10G) on the SFP port, plus the SYS LED

Photos

Front panel:

Board mounted in the case, with the internal PSU above it:

PCB overview

Top side:

Bottom side:

A 4-pad UART header with RXD / TXD silkscreened sits next to the right heatsink.

Port layout

Logical port	Physical port	Type
1-8	1-8	RJ45
9	9	SFP+

LED configuration

RJ45 ports use LED SET0, the SFP+ port uses LED SET1. The board needs the custom LED mux (led_mux_custom = 1), and RTL837X_REG_LED_GLB_IO_EN is written to 0x7f24977f in machine_custom_init() so the LED pins are enabled as wired here.

SET	LED pin 0	LED pin 1
SET0	Green — lights on 2.5G link with activity	Amber — lights on 1G / 100M / 10M link with activity
SET1	All speeds — lights on any link with activity	10G — lights on 10G link with activity

On the front panel this gives one bi-color Link/Act LED per RJ45 port (green at 2.5G, amber at 10/100/1000M, blinking with activity) and one PoE LED per RJ45 port, which is driven by the PoE hardware and not by the switch. The SFP+ port has a green 2.5G LED and a blue 10G LED.

SFP GPIO assignments

SFP (logical 9)	pin_detect (ModAbs)	pin_los	pin_tx_disable	SerDes	I2C SDA	I2C SCL
SFP	GPIO38	GPIO_NA	GPIO_NA	SDS1	GPIO39_I2C_SDA4	GPIO40_I2C_SCL3_MDC1

Machine configuration

make MACHINE=REALHD_PSW8_25MG

Programming

The serial console runs at 8N1 on 115200 baud with the RTLPlayground firmware (see the UART header note under PCB overview). The stock firmware baud rate 57600. The flash chip was 2MB.

PoE

The 8 RJ45 ports support PoE, powered by the internal 150W AC PSU (DC output 53.5V 2.8A) mounted above the main board.

Note: RTLPlayground does not provide PoE management for this board. The PoE hardware runs with its own configuration, the same as on the other PoE boards in this project.