Cisco SG220 / SF220 Series

All models share the same firmware image. The image format is the same as the bix format, used by the Zyxel GS1900 series switches.

The SG220-26 and SG220-26P appear to use the same board, although some components related to the PoE management are missing on the SG220-26's main board

• RTL8382M
• 2× RTL8218B PHYs
• RTL8214FC SFP PHY
• 3× RTL8231 GPIO extenders
• Winbond W631GU8MB (128MiB DDR3 SDRAM)
• Macronix MX25L25635F, Winbond 25Q256FVFG (32MiB SPI flash)
• Sipex SP3232, ADM3202 RS-232 transceiver

The JTAG header uses the MIPS eJTAG pin-out, with pin 12 bound to ground.

      +-J4-----+
TRST# |  1   2 | GND
  TDI |  3   4 | GND
  TDO |  5   6 | GND
  TMS |  7   8 | GND
  TCK |  9  10 | GND
SRST# | 11  12 | GND
  N/C | 13  14 | VCC
      +--------+

• Product page
• Series firmware download page
• GPL source code