Hi,
Is it the following one ?
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c02131049
If yes then NO, it can't read SDXC cards. This is the hardware thing which need vendror (not HP) supports with a firmware. You can buy an external card reader (USB card reader). Please read the following note:
"Secure Digital High Capacity (SDHC) and Secure Digital Extended Capacity (SDXC) are memory cards with greater data capacity than the standard SD cards. When using an SDHC or SDXC card, make sure the card reader specifically supports the format for the card being used. For example, an SDXC memory card must only be used with an SDXC compatible USB reader or adapter. Look for the corresponding SDXC logo on the device or check the with the device manufacturer for specific information."
Source: HP PC's Card Reader
Regards.