Tom,
re: MSM5000 v. MSM5105
<< "shipping MSM5100's in fact they had to really wait for the MSM5105's for the mass market >>
I reviewed all the 1xRTT chipset data I could find this morning. Its a little scattered so I compiled a simple directory with links and placed it over on the "Qualcomm - News Only" thread:
Message 15179717
As you remember I postulated that amongst other reasons that we have not had much visibility on the SKT 1xRTT "launch", and there aren't a lot of handset models, and seemingly little subscriber takeup was that SKT and their vendors could be waiting for volume shipments of the MSM5105 that is now sampling.
After reviewing the documentation, I'm rather convinced that this is at least a possibility.
These are some of the reasons I think this is a possibility:
* The MSM5000 was clearly designated as a "trial" chip initially (Roadmap #1). Obviously it's been used successfully for that purpose.
* The MSM5000 specifications date back to the original IS-2000 TIA standard (July 1999) which probably had some significant changes due to OHG harmonization review before final publication to ITU in march 2000 and acceptance shortly after, that would not have been incorporated into the MSM5000 but would have been into the MSM5105. One obvious change was the R-UIM.
* The MSM5000 does not provide R-UIM I/O. This may not be an SKT requirement, but I would think they might consider it desirable, since they evidently have R-UIM program in progress for frequent travellers, and are roaming with china.
* Necessary changes from trialing are no doubt incorporated in the MSM5105. Difficult to get everything correct on the first cut.
* The MSM5000 is MSM3000 based and the MSM5105 is MSM3100 based. The MSM3000 and MSM3100 are NOT pin compatible (although package form factor identical) and have different supply voltages. This might or might not be significant to a handset vendor.
* Carriers prefer to support as few chip versions as possible if they have the luxury of time, which SKT might have because they are still faced with cutting back subs, still building out for 1xRTT, and handset subsidy ban is still in effect.
One interesting thing I noted in reading the documentation was that this statement for the MSM5000 ...
"QUALCOMM has exceeded the ITU's 3G requirements for data rates in full wide area mobility of 144 kilobits per second (kbps) by enabling data rates of 153.6 kbps on both the forward and reverse links ... up to twice the overall capacity over IS-95A and IS-95B systems."
... becomes this for the MSM5105 (in the press release):
"QCT's MSM5105 solution supports up to 153 kilobits per second (kbps) in the forward link."
No mention of the reverse link speed here. This could be an oversight as the (September) product spec sheet states that the ITU 144 kbps requirement was achieved on a forward dedicated control channel and a reverse dedicated control channel.
If you compare the "Device Functional Block Diagrams" in the product spec sheets (MSM5105 v. MSM5000) there are several differences, but I'm not up to commenting on them ("sales dummy").
These features are available in the MSM5105 (not the MSM5000) - I think.
* Embedded QDSP2000 digital signal processor core, enabling a comprehensive set of features such as voice recognition, voice memo, speech compression, acoustic echo cancellation, noise suppression and audio enhancement.
* Integrated USB device controller for fast and simple PC interconnect
* CMX support for MIDI, text and graphics-based multimedia applications with optional software
* Standard MIDI ringer
* R-UIM interface
* PM1000 - Charging System
* Auxiliary Codec
This is kind of summed up in this sentence from the product overview.
"Also integrated in the MSM5105 device are analog functions such as audio voice codec, PLL, transmit DACs, ADCs, memories, a Universal Serial Bus (USB) device controller, a R-UIM controller, an increased number of GPIOs, peripheral interfaces, and an enhanced clock and power management architecture."
Thats all I know. It might not mean much of anything. I hope it doesn't hold up revenue but it could. Good news is that so we should catch some good revenue Q4 and perhaps earlier and the chipset should work for Verizon and Sprint PCS.
- Eric - |
