S3C2440X datasheet(93/429 Pages) SAMSUNG

Part #	S3C2440X

Description	16/32-bit RISC microprocessor

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Manufacturer	SAMSUNG [Samsung semiconductor]

Direct Link	http://www.samsung.com/Products/Semiconductor

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93 / 429 page

2003.09.25

Preliminary product information describes products that are in development,

for which full characterization data and associated errata are not yet available

Specifications and information herein are subject to change without notice.

S3C2440X

CLOCK & POWER MANAGEMENT

7

-11

IDLE

SLEEP

NORMAL

(SLOW_BIT=0)

SLOW

(SLOW_BIT=1)

IDLE_BIT=1

Interrupts, EINT[0:23], RTC alarm

SLEEP BIT=1

EINT[15:0],

RTC alarm

RESET

Figure 7-8. Power Management State Diagram

Table 7-2. Clock and Power State in Each Power Mode

Mode

ARM920T

AHB Modules (1)

/WDT

Power

Management

GPIO

32.768kHz

RTC clock

APB Modules (2)

& USBH/LCD/NAND

NORMAL

O

SEL

O

SEL

IDLE

X

O

SEL

O

SEL

SLOW

O

SEL

O

SEL

SLEEP

OFF

Wait for wake-

up event

OOFF

NOTES:

1.

USB host,LCD, and NAND are excluded.

2.

WDT is excluded. RTC interface for CPU access is included.

3.

SEL : selectable(O,X), O : enable , X : disable OFF: power is turned off

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