BTW does Broadcom have technical documentations (pin layout) for their chips online? Howmany balls does these chip have?
No, have no idea.
For adding additional signal lines it would be "nice" to know which ball of the chip is to use *g*.
Please note, that 4702 uses different memory controller, which is capable at most for 64MB.
Well _if_ there would be a signal line for 64MB but that size would enough to have much more fun *g*.
When resonable RAM upgrades (without desolder the CPU) probably will be limited to 32 MB, what about FLAH UPGRADE? I would prefer a box with usb - to add flash memory would be cheaper and more flexible, but there are many boxes out without USB.
Again selfqoute form a former posting:
The same I think would be possibel with the Routers, the memory is expensive, so it is solderd seperated on the board as you can see here:
http://voidmain.is-a-geek.net/si/?i=wrt … 205%20pins
In the middel you can see on violett:
Another picture http://kampfzwerg.cdaniel.de/gallery/album23/01030010_G?full=1
has on a green field:
AFAIK are these chips a family with same pinlayout, independent on the flash size. It is realy a pitty that there is no public Broadcom BCM47x2 specification (I will email Broadcom to get one), but I can imagine that already the BCM4702 could manage 64 MB flash. (But I have some doubts, too, the Treo 600 phone is based on a Broadcom chip as well and in a forum some people complaint the low flash memory - I hope it is only a question of costs, not of a chip layout!)
Intel seems to have two kind of flash:
"The IntelÂ® Advanced+ (C3) and Advanced (B3) Boot Block Flash memory family is the world's first flash memory on the 0.13 Âµm process lithography-Intel's fifth generation of its successful boot block memory products. Intel's C3 and B3 products are the industry's most widely used flash memory with a read/write and erase voltage range of 2.7 - 3.6 V for simplified low-voltage system design."
"Security Features (C3 only)
Advanced+ Boot Block Flash memory offers a number of features that provide our customers with an additional level of security including a unique silicon serial number and fraud protection register. It enables next-generation security solutions and is ideally suited for minimizing the risk of cloning and fraud in digital cellular phones and internet appliances.
Intel's C3 memory enables real-time protection for stored data and helps prevent corruption through instant individual block locking. Also, high-speed programming reduces manufacturing time-without the need for costly external voltage switching logic."
Whats clear is that the chip has a TSOP format - you must have quiet hands (and engough coffee) to solder this
-How much Flash Memory could adress the BCM4702 and the BCM4712?
-Is there also a limitation because of missing lines?
Wish you all a merry christmas,