June 27, 2017

The DPH153-AT Femtocell

I have a new unit with a different compliment of chips. These are some notes about an older version that I found online. I didn't know mine was very different until I opened it up.

Date codes on the chips indicate this was manufactured in 2010.

The red arrow in the figure below points to the three "anti-tamper" jumpers with the grey "jumper yanker" in place around them.

There are two Soc, one by RaLink (the RT2010F), which presumably handles WiFi and may have a 360 Mhz MIPS processor inside. The other Soc is by PicoChip, the PC202 with an ARM926EJ inside. There is also a GPS module, for reasons you might not expect. It runs linux, a 2.6.24 kernel more or less.

Some of the chips:

WiFi? - Ralink RT2150F
GPS - RoyalTek REB-1315LPNX
FPGA - Xilinx XC3S400A
SDRAM - Winbond W9812G6IH
Flash - MX 29LV320DBTI-70G
Baseband+ARM9 Processor - picoChip PC202, based on ARM926EJ-S processor
SDRAM - Samsung DDR2 K4T51163QG-HCE6
Flash - Spansion GL512P10FFCR2
Ethernet Transceiver - SMSC LAN 8700c-aecz
The PicoChip PC202 is perhaps the most interesting part on the board. This is an English company making unique mulicore DSP devices. Interestingly there is an ARM logo on the part as well. The ARM 926EJ is an older ARM (arm v5) with an 8-bit "Jazelle" mode. This is from the 1998-2006 era and is pretty long in the tooth these days. On many units, the PC202 has a heatsink mounted on it.
Have any comments? Questions? Drop me a line!

Tom's electronics pages / [email protected]