What dose "R" suffix mean of OMAP-L138 device nomenclature?

Hi Champs,

There is no information about "R" suffix of OMAPL138EZCEA3R and OMAPL138EZWTA3R in the datasheet(SPRS586I).
So, could you please let me know what it means?

Thank you in advance for your cooperation.

Best regards,
j-breeze