HD4048412FS datasheet(40/127 Pages) RENESAS

Part #	HD4048412FS

Description	4-Bit Single-Chip Microcomputer

PDF	127 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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40 / 127 page

HD404849 Series

Low-power mode

operation cycle

IF = 1 and

IM = 0?

Hardware NOP

execution

←

Iocation

MCU operation

cycle

Standby/watch

mode

IF = 1 and

IM = 0?

Hardware NOP

execution

Iocation

←

Instruction

execution

Stop mode

Yes

For IF and IM operation, refer to figure 15.

STOPC = 0?

RAME = 1

Reset MCU

Yes

Figure 22 MCU Operating Sequence (Low-Power Mode Operation)

Notes on Use:

• When the MCU is in watch mode or subactive mode, if the high level period before the falling edge of

INT

0 is shorter than the interrupt frame, INT0 will not be detected. Also, if the low level period after the

falling edge of

INT

0 is shorter than the interrupt frame, INT0 will not be detected.

Edge detection is shown in figure 23. The level of the

INT

0 signal is sampled by a sampling clock.

When this sampled value changes from high to low, a falling edge is detected.

HD4048412FS Datasheet(PDF) 40 Page - Renesas Technology Corp