2 system clock and cpu clock switching procedure – NEC uPD78056Y User Manual

PD78056Y, PD78055Y, PD78058, PD78052Y, PD78P058Y, PD78P054, PD78054Y, uPD78054Y, PD78056, PD78058Y, uPD78058Y, uPD78052, uPD78055Y, PD78053Y, uPD78052Y, uPD78054, uPD78P058, uPD78053, PD78052(A), uPD78053Y, uPD78056, PD78055, uPD78058, uPD78P054, PD78052, PD78053(A), PD78053, PD78054(A)