UT theoretical chemistry code forum

I used LAECHG flag for CaAlSi. It gives three charge files : AECCAR0, AECCAR1, AECCAR2.
If AECCAR0 is core charge denisty and AECCAR2 is the valence, what is AECCAR1?
Am I getting 1 and 2 because Ca has 10 valence electrons?
Should I add all three of them to get total charge density?
(like chgsum ...