am572x用户手册中，关于dpll_abe模块的问题

手册为spruhz6k，《AM572x Sitara™ Processors Silicon Revision 2.0, 1.1》，3.6.3.1章节，

NOTE: The audio back end (ABE) module is not supported for this family of devices, but the ABE
name is still present in some clock or DPLL names.

应该如何理解？dpll_abe在am572x中不可用吗？