So I was reading on HTC's site, and if I understood correctly, it says that the SQN1210 is part of the processor. I then did a little research, and found that "2.5 to 2.7 GHz WiMAX 802.16e" is used for the 4G network (I'm kind of confused about this part).
The
Qualcomm Snapdragon MSM8660 SoC (System on (a) Chip) processor includes various controls for radios in the form a built-in modem
(as shown in this download link for its data sheet (PDF)), but each radio is separate.
The
Sequans SQN1210 SoC is a separate chip, and its picture and PDF data sheet are available in that link.
Notice that not just processors are SoCs - any system on (a) chip is an SoC.
I'm not trying to cause any dissension or worry but...
On Page 6 of the schematic it shows 768MB LPDDR2-SDRAM and 4GB eMMC (ROM) (there happens to be a tiny asterisk under the diagram, but no point of reference). Maybe the Euro version is the 768MB flavor?
One of us was going to mention it.
The asterisk is actually: *TBD -- meaning, to be determined.
I suspect that if we looked, we'd find some sort of variance allowing that to be changed in final production.
Or - they've kinda lied, and will play the specs-subject-to-change-without-notice game. I just can't see HTC doing that, it would be against their self-interests.
Or, there is some odd distribution and I'll get to that.
It has a 4GB eMultiMediaCard it shows labeled as ROM, but you suspect there is 1GB ROM AND 4GB eMMC used only as storage? Can an eMMC be used/considered as native ROM or is it just a storage area -- PC analogy: system ROM vs. Hard Disk Drive? (HDD does not = ROM)
My question is can the purported 1GB (native) ROM and the un-accounted for 256MB RAM be located on one of the other chips somewhere? I don't know a whole lot about mobile chips and construction. Do they package a small amount of RAM and ROM on the main system chip or others? How much faith do we place in the FCC schematic vs. what the manufacturer and distributor claim.
OK, let's get this all deconflicted, and I'm going to address the general audience in this write-up.
There is a single package for ALL motherboard user memory (*) in the 3vo and it's made by Samsung (and in that regard, it's exactly like the Evo, just using a new/different package).
Once upon a time, we had chips in packages. If you've seen inside a PC, the CPU and memory (for example) were each a single chip inside each package. The black thing you can see and touch, the house for the chip in other words, is called a package. In the old days, we used the words chip and package interchangeably because there was just one chip inside each package.
And we've heard about taking like a piece of a PC motherboard with several chips, and making it all on one HUGE chip, and we call that a System on (a) Chip - SoC. That's still one (huge) chip in a single package.
There's also another level of organization: the multi-chip package - MCP. An MCP is not an SoC. An MCP is where they take more than one chip and house them in a single package. They're not a system, this is just a way to have fewer packages to deal with, for convenience and economy. Hence, the MCP at top of the diagrams on page 6 of the schematic.
In the 3vo's case, the MCP is a Samsung KMMLL000QM-B503. (No detailed data sheet online that I've found.)
ROM vs RAM vs eMMC
In the old days, we had RAM - random access memory, meaning you get to any memory bit any way you liked. We still have that.
In the old days, we had a kind of chip called ROM - read-only memory (with random access) - and the thing with ROM is it remembers when the power is off (RAM forgets when the power is off). A ROM could never be written to once burned at the factory. Then we had various programmable ROMs, where you could write to them for some limited number of times, but you could read them to your heart's content - these, we used for PC BIOS for those of you familiar with that.
Years ago, they invented a new kind of memory that they called
flash memory. Any of your USB sticks or SD cards of any kind - all flash memory. If you recall, advanced smartphones, MP3 players and USB sticks all started hitting the shelves at about the same time - because of flash memory.
The thing we call ROM in modern smartphones isn't ROM at all, it just acts like ROM because it remembers when the power is off - it's been flash memory all along.
An SD card is a type of multi-media card (MMC). Recently, someone bright said - hey, we have one type of interface to the SD card and another type of interface to this stuff we're telling people is ROM, but it's all just flash memory. How about we make the ROM thingy with the same interface to simplify things? Good idea, so they did it.
And that's the eMMC flash memory aka ROM in the 3vo.
So - in that one Samsung package, there's going to 1 GB LPDDR2 RAM and 4 GB eMMC - or you can call it 1GB RAM / 4GB ROM.
(Fun fact if you've read this far. Flash memory is factory-built with one of two types of logic - NOR (not or) or NAND (not and). The flash we use in our phones is the nand logic type. So when you hear rooters talking about the NAND bootloader or making a nandroid backup of their rom - it's all about using slang for the actual type of flash memory the phones have.)
And on that odd distribution of RAM - if there's 256 MB squirreled away inside the 8660, Qualcomm isn't talking, so I don't know. Or the actual MCP will have 1GB. Either way - it's going to have 1 GB RAM, imo.
btw - LPDDR2 RAM and LPDDR2 SDRAM are the same thing, call it either way you like, I chose the former because it's 2 fewer characters to type.
To Vanquished:
I'd keep the specs simple. Just replace CDMA2000 with CDMA and I'd spec 4G like this:
4G: WiMAX (same as on Evo 4G, even the same radio chip)
I'd spec memory like this:
1 GB RAM (LPDDR2 type)
4 GB ROM (eMMC type)
Up to 32 GB microSD user storage optional, 8 GB stock
And then link to any of the posts naming chips and discussing stuff if you'd like to do that.
We're getting all fancy up in here, but I think you started out perfectly and should stay that way - just the facts that anyone can understand or compare to other phones, with backup statements and links if anyone is interested in how you know the truth. That said, I'm a propeller-head, and you should freely arrange those specs as you see fit.
~~~~~~
Hope this helps and wasn't too painful to follow.
Edit and PS - If you missed the original Evo 4G teardown, here's a blown-up picture of the Evo motherboard, full of black packages. The Snapdragon and WiMAX SoCs are outlined in yellow and orange, and the Samsung memory package sit above the Snapdragon. This will give you an idea of the scale of things and what these packages look like. Note - not the 3vo, this is just informational.
http://guide-images.ifixit.net/igi/gBPuLxjHbmBSFKqi.huge
From -
http://www.ifixit.com/Teardown/HTC-Evo-4G-Teardown/2979/2
(*) in addition to motherboard memory, you can add up to 32 GB of user storage on a microSD card.