[Galaxy S II Q&A, Help & Troubleshooting] E:V:A:
The GT-I9100 Baseband Processor (BP/CP) Specifications

Currently I have got two different specifications regarding what BP is used in the SGS2, most likely due to the different versions available of the SGS2 in Europe vs. USA. The ones I have are:

Intel/Infineon XMM6260 is the "platform" that consists of:

a) The X-GOLD 626 (ARM1176?, 40nm) baseband processor

b) The SMARTi UE2 RF-transceiver (65nm CMOS)

c) The 3GPP Release 7 HSPA+ protocol stack with:

Downlink: Category 14, Uplink: Category 7

d) Alternative Names*: Infineon IFX6260 = Intel IMC6260 = Intel XMM6260

e) Picture: http://www.infineon.com/export/sites/default/media/press/Image/press_photo/X-GOLD626.jpg

f) Datasheet: N/A :(

g) Most likely used in European phones

h) is apparently also present in the iPhone 4S.. (check!)

i) Closest available documentation:

XMM6160 (X-GOLD 616, ARM1176) which is also used in the SGS-1:

http://www.infineon.com/dgdl/X-GOLD...f0004&fileId=db3a30431ed1d7b2011f5bee88ef75eb

The biggest difference is in the SMARTi-UE RF-chip. BP remains similar.

XMM6180 (X-GOLD 618, ARM1176 @416 MHz) used in the iPhone4 & iPad2:

http://www.infineon.com/dgdl/X-GOLD...f0004&fileId=db3a30431ed1d7b2011f5bec418f75e6

.

Qualcomm QSC6085 (65nm,424 CSP, 12x12mm) contain:

a) BP: ARM926EJS @ 192 MHz

b) + QDSP @ 96 MHz (also on BP)

c) Modem: IS-95 A/B, 1X Rel.0, EVDOr0, EVDOrA

d) is apparently also present in the "Verizon Wireless USB760 Modem"

e) Picture: N/A

f) Datasheet: N/A :(

g) Most likely used in North American (US) phones (CDMA)

*It should be noted that Infineon Technologies (Wireless Division) has been acquired by Intel Mobile Communications, in early 2011.

In fact these two differences just made a whole lot of sense from the available AT command sets. Basically the modem specific AT commands immediately give up the manufacturer of the modem firmware. (Yes, competing OEM developers do work together!) Because the command sets usually consists of 3 types.

The old school "Hayes" AT standard given by ETSI GSM 07.07.

Vendor Proprietary AT commands, specific for each OEM.

Carrier Proprietary AT commands, specific to some service providers. (E.g. AT&T, Sprint, T-mobile, Verizon etc.)

So for our 2 modem cases above we have the obvious Proprietary AT extensions:

Qualcomm QSCnnnn: AT$Q<something>

Intel/Infineon XMMnnnn: AT+X<something>
​

which indeed confirms the BP of my SGS2. Obviously there is a far easier way to reach this conclusion...

---------------------------------------------------------------

TIPS!

To see what baseband processor you have,

you can enter into ServiceMode and check.

This should always work as many ServiceMode

functions are directly modem dependent.

---------------------------------------------------------------

Why? Because the ServiceMode application

actually reside in the modem firmware!
​

Do this:

Dial: *#197328640#

MAIN MENU:
...
[2] VERSION INFO. -->
[1] SW VERSION -->
[5] READ ALL SW VERSION:
...
======>[COLOR=Red] IFX [/COLOR]SW VER: [COLOR=Red]SP6260[/COLOR]_U1_01.1135
...

This implies the phone is using software for the (Infineon) IFX 6260...
​

But the ServiceMode is just talking to the modem, so you can get the

same information by opening an (external) terminal shell and send

the following ATC:

[B]AT+XGENDATA[/B]

+XGENDATA: " [COLOR=Red]SP6260[/COLOR]_U1_01.1135_DB110831 2011-Sep-2 18:14:20
PDB_NOT_AVAILABLE
*SP6260_U1_01.1135_DB110831*"

"*"
OK

Here is the FBGA pin-out of that chip:

Fig.4.

A small addendum about the SMARTi UE2 chip

The BP is communicating with the RF-tranceiver chip called SMARTi UE2

(labelled "5712"), using a communication interface that corresponds to

the (MIPI) DigRF 3G (V.3.09) standard. Through this protocol the BP

(or other device) can also control some aspects of the RF to some

minor extent. But without the proper specifications of the 5712, it

may also contain other interfaces...

The DigRF connections:

Fig.5.

The SMARTi UE2 chip:

Fig.6.

Here are more link for the interested reader:

General DigRF info:

http://www.mipi.org/specifications/digrfsm-specifications

http://www.mipi.org/sites/default/files/Specification Overview final.pdf

http://electronicdesign.com/article/test-and-measurement/digrf-faqs19953.aspx

The DigRF protocol details:

http://www.siliconreleasesolutions.com/pdf/DigRF-TMWorld0509-FINAL.pdf

http://www.docstoc.com/docs/53386199/DigRF-BASEBAND-RF-DIGITAL-INTERFACE-SPECIFICATION