Intel Xscale PXA255: a new version

According to information posted, Intel plans to release XScale PXA250 with new stepping C1, however along with bugfixes the core was improved and new features added.

Here’s a list of PXA255 new features and improvements:

• HWUART universal hardware asynchronous transceiver
• SDRAM register configuration for Low Power mode
• 400/200MHz PxBus
• Core Clock Configuration Register (CCCR)
• Core Phase Locked Loop
• UDC Control Function Register (UDCCFR)
• NSSP

The changes turned out to be so significant that the company decided to give PXA250 stepping C1 a new name. Initially it should have been PXA255, however, Intel is expected to announce the new name closer to the end of Q1. In the near future their website should be updated with a technical brief for a new chip.

The main improvement of XScale PXA255 is the better CPU performance as a result of doubled PxBus clock (from 100 to 200 MHz), being an interface for external devices, including memory. Besides, XScale PXA255 is expected to consume less power in all modes. At that clock rates will remain the same as in PXA250, i.e. 200MHz, 300MHz, and 400MHz. According to provisional data, wholesale price will be similar to that of previous versions.

Source: Pocket PC Thoughts

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