CG3100D Cable modem

This modem DOCSIS 3.0 modem and has BCM3380 CPU. It employs 8M SPI flash.Use USB JTAG NT's can program the flash ISP.

The SPI chip
The ISP pin uses pin 4 of USB JTAG NT. When USB JTAG NT is unplugged it works as regular modem>

JTAG connector of USB JTAG NT Pin on the flash
Pin 4(GND) ISP
Pin 3(TDI) Pin 15(SI)
Pin 5(TDO) Pin 8(SO)
Pin 9(TCK) Pin 16(SCK)
Pin 11(RESET) Pin 7 (CS)
Pin 2(GND) Pin 10(GND)

Lasted Updated:December 31 2016

Vists since Jan 4,2009