HD6433636SW datasheet(106/418 Pages) RENESAS

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Bit 4— Noise Elimination Sampling Frequency Select (NESEL): This bit selects the frequency

at which the watch clock signal (ø

W) generated by the subclock pulse generator is sampled, in

relation to the oscillator clock (ø

OSC) generated by the system clock pulse generator. When øOSC = 2

to 10 MHz, clear NESEL to 0.

Bit 4: NESEL

Description

Sampling rate is ø

OSC/16

(initial value)

Sampling rate is ø

OSC/4

Bit 3—Direct Transfer on Flag (DTON): This bit designates whether or not to make direct

transitions among active (high-speed), active (medium-speed) and subactive mode 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.

Bit 3: DTON

Description

• When a SLEEP instruction is executed in active mode, a transition is

made to standby mode, watch mode, or sleep mode.

(initial value)

• When a SLEEP instruction is executed in subactive mode, a transition is

made to watch mode or subsleep mode.

• When a SLEEP instruction is executed in active (high-speed) mode, a

direct transition is made to active (medium-speed) mode if SSBY = 0,

MSON = 1, and LSON = 0, or to subactive mode if SSBY = 1, TMA3 = 1,

and LSON = 1.

• When a SLEEP instruction is executed in active (medium-speed) mode, a

direct transition is made to active (high-speed) mode if SSBY = 0, MSON

= 0, and LSON = 0, or to subactive mode if SSBY = 1, TMA3 = 1, and

LSON = 1.

• When a SLEEP instruction is executed in subactive mode, a direct

transition is made to active (high-speed) mode if SSBY = 1, TMA3 = 1,

LSON = 0, and MSON = 0, or to active (medium-speed) mode if SSBY =

1, TMA3 = 1, LSON = 0, and MSON = 1.

Bit 2—Medium Speed on Flag (MSON): After standby, watch, or sleep mode is cleared, this bit

selects active (high-speed) or active (medium-speed) mode.

Bit 2: MSON

Description

Operation is in active (high-speed) mode

(initial value)

Operation is in active (medium-speed) mode

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