H8SSLASH2218 datasheet(646/750 Pages) RENESAS

646 / 750 page

Section 19 Clock Pulse Generator

Rev.6.00 Jun. 03, 2008 Page 598 of 698

REJ09B0074-0600

Bit

Bit Name Initial Value R/W

Description

LSON

R/W

Low Speed ON Flag

0: When the SLEEP instruction is executed in high-speed

mode or medium-speed mode, operation shifts to sleep

mode, software standby mode, or watch mode*.

When the SLEEP instruction is executed in subactive

mode, operation shifts to watch mode* or shifts directly

to high-speed mode.

Operation shifts to high-speed mode when watch mode

is cancelled.

1: When the SLEEP instruction is executed in high-speed

mode*, operation shifts to watch mode or subactive

mode*.

When the SLEEP instruction is executed in subactive

mode, operation shifts to subsleep mode or watch mode.

Operation shifts to subactive mode when watch mode is

cancelled.

NESEL

R/W

Noise Elimination Sampling Frequency Select

This bit selects the sampling frequency of the subclock

(

SUB) generated by the subclock oscillator is sampled by

the clock (

φ) generated by the system clock oscillator

0: Sampling using 1/32 x

1: Sampling using 1/4 x

SUBSTP

R/W

Subclock Enable

This bit enables/disables subclock generation. This bit

should be set to 1 when subclock is not used.

0: Enables subclock generation.

1: Disables subclock generation.

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