[P3600 General] DeviLduck:
More on SDHC & Trinity

export800 said: "according to the HTC site the maximum size of the mini-SD card

for the Trinity is 12GB.. though who really knows for sure

http://www.europe.htc.com/support/faq.html?id=29

Support: HTC P3600

What is the maximum SD card size compatible with my device?

For Win CE 2003 =>General for SDIO is 1GB.

For WM 5.0 => SD Card is 4GB and Mini-SD is 12GB"

Matterhorn said: "Well, someone knows for sure, the guys writing the firmware ROMs. I

suspect it is just a matter of time before a ROM update comes along that will allow the use

of SDHC cards since the entries are already in the current ROM."

1. Notice that almost ALL phones on HTC site say the same thing about SD & miniSD limit. It is based on WM5 & WinCE2003 specs, which HTC phones use, a generalization.

2. IF HTC has SD controller hardware (memory slot interface) in Trinity, that can be enabled by a firmware upgrade to recognize & read SDHC, then as Matterhorn said, we should get a ROM upgrade to make this possible.(nobody knows & not confirmed by HTC, but we can

hope.)

If HTC doesn't have the SD controller that's amendable to firmware upgrade, then a new hardware build of Trinity would have to be released.

3. It's interesting that Trinity registry entries exist for SDHC, but it's still a mystery for now. Also, there are supposedly 4 GB miniSD cards (based on Industry Standard 1.0 or non-compliant) that exist, but I'm not able to confirm one that is genuine & safe to use

in Trinity yet. (if someone is, please give details)

4. Good news...bad news---

good-4 GB SDHC can use fat32, is faster than old regular ver 1.0 or 1.1 Standard----

bad-reportedly, the new SDHC cards will be 3X cost of the regular ones.

5. Compatibility

* SDHC Host Products can use both SD and SDHC Memory Cards.

* SD Host Products can use only SD Memory Card 2GB or less.

Is Trinity a SDHC host product or SD host product? THE BIG QUESTION (no SDHC logo on box)

The new SD format, SDHC (Secure Digital High Capacity), allows capacities in excess of 2GB (4GB to 32GB)[2]. SDHC USES THE SAME FORM FACTOR as SD, but the SD 2.0 standard in SDHC uses a different memory addressing method (sector addressing vs byte addressing).

6. Feeling Confused? Here's why:

The following compatibility issues between SD and SDHC cards and devices can arise:

Devices that do not specifically support SD2.0/SDHC do not recognize SDHC memory cards.

Some manufacturers have produced 4GB SD cards that do not conform to the SD2.0/SDHC, which are incompatible with existing SD devices, and are also incompatible with SDHC devices. As of late 2006, the simultaneous availability of non-standard 4GB SD and 4GB SDHC cards,

and the incompatibilities between SD and SDHC have caused a great deal of confusion among consumers looking to buy memory for various devices.

4GB SDHC cards can only work with SDHC compatible host devices. The SDHC logo is supposed to ensure compatibility.

SDHC readers and other devices are supposed to be backwards compatible with SD cards.

SDHC cards have SD Speed Class Ratings defined by the SD Association. The SD Speed Class

Ratings specify the following minimum sustained write speed for SDHC cards: Class 2: 2 MB/s, Class 4: 4 MB/s

Class 6: 6 MB/s.

The SD 2.0 (SDHC) specification is with access speed up to 20MB/sec. The maximum capacity of SD card is 2GB under SD 1.1 of Secure Digital Alliance (SDA) specification; however, by using file format of FAT32, many SD 1.1 host devices can use 4GB SD card.

SD 1.0/1.1 uses traditional "Byte Addressing" scheme which limits the maximum capacity to 4GB while SD 2.0 adopts "Sector Addressing" scheme which is the same with the technique applied by Mu-Card Alliance in 2004 to reach the maximum capacity of 2TB (2048GB). SDHC

cards can only work with SDHC compatible host devices.

7. SD and SDHC - compatibility---In summary:

The new SD format, SDHC (Secure Digital High Capacity), allows capacities in excess of 2GB (4GB to 32GB). SDHC uses the same form factor as SD, but compatibility is not complete in either direction. The SD 2.0 standard in SDHC uses a different memory addressing method

(sector addressing vs byte addressing), causing devices that do not specifically support SD 2.0 / SDHC to fail to recognize the memory cards. Making the issue more confusing is the fact that some manufacturers have produced SEMI-NONSTANDARD 4GB SD cards. These cards are incompatible with SD devices that don't support the larger formats, and are also incompatible with many SDHC devices, because they don't conform to the SD 2.0 spec for High Capacity memory cards. As of late 2006, the simultaneous availability of non-standards 4GB

SD and 4GB SDHC cards, and the incompatibilities between SD and SDHC have caused a great deal of confusion among consumers looking to buy memory for various devices.

References,

SD Card Association: http://www.sdcard.org/WhatsNew.aspx

SD World Portal Website: http://www.sdcard.com/