ISL12024IRTCZ datasheet(9/24 Pages) INTERSIL

부품명	ISL12024IRTCZ

상세설명	Real-Time Clock/Calendar with Embedded Unique ID

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제조업체	INTERSIL [Intersil Corporation]

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9

FN6749.0

August 8, 2008

24 Hour Time

If the MIL bit of the HR register is 1, the RTC uses a 24-hour

format. If the MIL bit is 0, the RTC uses a 12-hour format,

and the H21 bit functions as an AM/PM indicator with a ‘1’

representing PM. The clock defaults to standard time with

H21 = 0.

Leap Years

Leap years add the day February 29 and are defined as

those years that are divisible by 4.

Status Register (SR)

The Status Register is located in the CCR memory map at

address 003Fh. This is a volatile register only, and is used to

control the WEL and RWEL write enable latches, read power

status and two alarm bits. This register is separate from both

the array and the Clock/Control Registers (CCR).

BAT: Battery Supply - Volatile

This bit set to “1” indicates that the device is operating from

VBAT, not VDD. It is a read-only bit and is set/reset by

hardware (ISL12024IRTCZ internally). Once the device

begins operating from VDD, the device sets this bit to “0”.

AL1, AL0: Alarm Bits - Volatile

These bits announce if either alarm 0 or alarm 1 match the

real-time clock. If there is a match, the respective bit is set to

‘1’. The falling edge of the last data bit in a SR Read

operation resets the flags. (Note: Only the AL bits that are

set when an SR read starts will be reset). An alarm bit that is

set by an alarm occurring during an SR read operation will

remain set after the read operation is complete.

RWEL: Register Write Enable Latch Volatile

This bit is a volatile latch that powers up in the LOW

(disabled) state. The RWEL bit must be set to “1” prior to any

writes to the Clock/Control Registers. Writes to RWEL bit do

not cause a non-volatile write cycle, so the device is ready

for the next operation immediately after the stop condition. A

write to the CCR requires both the RWEL and WEL bits to be

set in a specific sequence.

WEL: Write Enable Latch - Volatile

The WEL bit controls the access to the CCR during a write

operation. This bit is a volatile latch that powers up in the

LOW (disabled) state. While the WEL bit is LOW, writes to

the CCR address will be ignored, although acknowledgment

is still issued. The WEL bit is set by writing a “1” to the WEL

bit and zeroes to the other bits of the Status Register. Once

set, WEL remains set until either reset to 0 (by writing a “0”

to the WEL bit and zeroes to the other bits of the Status

Register) or until the part powers up again. Writes to WEL bit

do not cause a non-volatile write cycle, so the device is

ready for the next operation immediately after the stop

condition.

RTCF: Real-Time Clock Fail Bit - Volatile

This bit is set to a ‘1’ after a total power failure. This is a read

only bit that is set internally when the device powers up after

having lost all power to the device. The bit is set regardless

of whether VDD or VBAT is applied first. The loss of only one

of the supplies does not result in setting the RTCF bit. The

first valid write to the RTC after a complete power failure

(writing one byte is sufficient) resets the RTCF bit to ‘0’.

Unused Bits:

Bit 3 in the SR is not used, but must be zero. The Data Byte

output during a SR read will contain a zero in this bit

location.

TABLE 1. STATUS REGISTER (SR)

ADDR

7

6

5

4

3

2

1

0

003Fh

BAT

AL1

AL0

0

RWEL

WEL

RTCF

Default

0

1

ISL12024IRTCZ

유사한 부품 번호 - ISL12024IRTCZ

제조업체	부품명	데이터시트	상세설명
Intersil Corporation	ISL12024IRTCZ	768Kb / 6P	High-Accuracy RTC Modules, Feature-Rich RTCs
Intersil Corporation	ISL12024IRTCZ	9Mb / 44P	Providing high-performance solutions for every link in the signal chain
Renesas Technology Corp	ISL12024IRTCZ	974Kb / 24P	Real-Time Clock/Calendar with Embedded Unique ID
Intersil Corporation	ISL12024IRTCZ	426Kb / 24P	Real-Time Clock/Calendar with Embedded Unique ID December 15, 2011

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유사한 설명 - ISL12024IRTCZ

제조업체	부품명	데이터시트	상세설명
Intersil Corporation	ISL12024IRTC	426Kb / 24P	Real-Time Clock/Calendar with Embedded Unique ID December 15, 2011
Renesas Technology Corp	ISL12024	1,018Kb / 25P	Real-Time Clock/Calendar with Embedded Unique ID
Renesas Technology Corp	ISL12024IRTC	974Kb / 24P	Real-Time Clock/Calendar with Embedded Unique ID
Intersil Corporation	ISL12024	395Kb / 25P	Real-Time Clock/Calendar with Embedded Unique ID
Microchip Technology	MCP79410	1Mb / 60P	Battery-Backed I2C??Real-Time Clock/Calendar with EEPROM and Unique ID 11/29/12 2010-2013
	MCP79400	574Kb / 38P	I2C??Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover 2011
	MCP79400T-I	1Mb / 42P	I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover 11/29/11
	MCP79410	580Kb / 38P	I2C??Real-Time Clock/Calendar with EEPROM, SRAM, Unique ID and Battery Switchover 2011
NXP Semiconductors	PCF8563	466Kb / 45P	Real-time clock/calendar Rev. 9-16 June 2011
NXP Semiconductors	PCF8563TF4.118	492Kb / 50P	Real-time clock/calendar Rev. 10-3 April 2012

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ISL12024IRTCZ 데이터시트(PDF) 9 Page - Intersil Corporation

ISL12024IRTCZ 데이터시트(HTML) 9 Page - Intersil Corporation

유사한 부품 번호 - ISL12024IRTCZ

유사한 설명 - ISL12024IRTCZ

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