Hitachi H8/3664 Hardware Manual page 100

Table of Contents

Bit 5—Direct Transfer on Flag (DTON): This bit designates whether to make direct transitions

between the active and subactive modes when a SLEEP instruction is executed. The mode to

which the transition is made after the SLEEP instruction is executed depends on a combination of

this and other control bits.

Bits 4 to 2—Active Mode Clock Select (MA2 to MA0): These bits select the operating clock

frequency in the active and sleep modes. The operating clock frequency changes to the set

frequency after the SLEEP instruction is executed.

Note: * Don't care

Bits 1 and 0— Subactive Mode Clock Select (SA1, SA0): These bits select the operating clock

frequency in the subactive and subsleep modes. The operating clock frequency changes to the set

frequency after the SLEEP instruction is executed.

Note: * Don't care

When a SLEEP instruction is executed, a transition is made to standby mode,

sleep mode, or subsleep mode.

When a SLEEP instruction is executed, a direct transition is made to active

mode if LSON = 0, or to subactive mode if LSON = 1.

(Initial value)