Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

ISL1208IB8 Arkusz danych(PDF) 9 Page - Intersil Corporation

Numer części ISL1208IB8
Szczegółowy opis  I2C Real Time Clock/Calendar
Download  21 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  INTERSIL [Intersil Corporation]
Strona internetowa  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL1208IB8 Arkusz danych(HTML) 9 Page - Intersil Corporation

Back Button ISL1208IB8 Datasheet HTML 5Page - Intersil Corporation ISL1208IB8 Datasheet HTML 6Page - Intersil Corporation ISL1208IB8 Datasheet HTML 7Page - Intersil Corporation ISL1208IB8 Datasheet HTML 8Page - Intersil Corporation ISL1208IB8 Datasheet HTML 9Page - Intersil Corporation ISL1208IB8 Datasheet HTML 10Page - Intersil Corporation ISL1208IB8 Datasheet HTML 11Page - Intersil Corporation ISL1208IB8 Datasheet HTML 12Page - Intersil Corporation ISL1208IB8 Datasheet HTML 13Page - Intersil Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 21 page
background image
9
FN8085.3
July 29, 2005
not begin incrementing until at least one byte is written to the
clock register.
Accuracy of the Real Time Clock
The accuracy of the Real Time Clock depends on the
frequency of the quartz crystal that is used as the time base
for the RTC. Since the resonant frequency of a crystal is
temperature dependent, the RTC performance will also be
dependent upon temperature. The frequency deviation of
the crystal is a function of the turnover temperature of the
crystal from the crystal’s nominal frequency. For example, a
~20ppm frequency deviation translates into an accuracy of
~1 minute per month. These parameters are available from
the crystal manufacturer. The ISL1208 provides on-chip
crystal compensation networks to adjust load capacitance to
tune oscillator frequency from -94ppm to +140ppm. For
more detailed information see the Application Section.
Single Event and Interrupt
The alarm mode is enabled via the ALME bit. Choosing
single event or interrupt alarm mode is selected via the IM
bit. Note that when the frequency output function is enabled,
the alarm function is disabled.
The standard alarm allows for alarms of time, date, day of
the week, month, and year. When a time alarm occurs in
single event mode, an IRQ pin will be pulled low and the
alarm status bit (ALM) will be set to “1”.
The pulsed interrupt mode allows for repetitive or recurring
alarm functionality. Hence, once the alarm is set, the device
will continue to alarm for each occurring match of the alarm
and present time. Thus, it will alarm as often as every minute
(if only the nth second is set) or as infrequently as once a
year (if at least the nth month is set). During pulsed interrupt
mode, the IRQ pin will be pulled low for 250ms and the alarm
status bit (ALM) will be set to “1”.
NOTE: The ALM bit can be reset by the user or cleared
automatically using the auto reset mode (see ARST bit).
The alarm function can be enabled/disabled during battery
backup mode using the FOBATB bit. For more information
on the alarm, please see the Alarm Registers Description.
Frequency Output Mode
The ISL1208 has the option to provide a frequency output
signal using the IRQ/FOUT pin. The frequency output mode
is set by using the FO bits to select 15 possible output
frequency values from 0 to 32kHz. The frequency output can
be enabled/disabled during battery backup mode using the
FOBATB bit.
General Purpose User SRAM
The ISL1208 provides 2 bytes of user SRAM. The SRAM will
continue to operate in battery backup mode. However, it
should be noted that the I2C bus is disabled in battery
backup mode.
I2C Serial Interface
The ISL1208 has an I2C serial bus interface that provides
access to the control and status registers and the user
SRAM. The I2C serial interface is compatible with other
industry I2C serial bus protocols using a bidirectional data
signal (SDA) and a clock signal (SCL).
Oscillator Compensation
The ISL1208 provides the option of timing correction due to
temperature variation of the crystal oscillator for either
manufacturing calibration or active calibration. The total
possible compensation is typically -94ppm to +140ppm. Two
compensation mechanisms that are available are as follows:
1. An analog trimming (ATR) register that can be used to
adjust individual on-chip digital capacitors for oscillator
capacitance trimming. The individual digital capacitor is
selectable from a range of 9pF to 40.5pF (based upon
32.758kHz). This translates to a calculated
compensation of approximately -34ppm to +80ppm. (See
ATR description.)
2. A digital trimming register (DTR) that can be used to
adjust the timing counter by ±60ppm. (See DTR
description.)
Also provided is the ability to adjust the crystal capacitance
when the ISL1208 switches from VDD to battery backup
mode. (See Battery Mode ATR Selection for more details.)
Register Descriptions
The battery-backed registers are accessible following a
slave byte of “1101111x” and reads or writes to addresses
[00h:13h]. The defined addresses and default values are
described in the Table 1. Address 09h is not used. Reads or
writes to 09h will not affect operation of the device but should
be avoided.
REGISTER ACCESS
The contents of the registers can be modified by performing
a byte or a page write operation directly to any register
address.
The registers are divided into 4 sections. These are:
1. Real Time Clock (7 bytes): Address 00h to 06h.
2. Control and Status (5 bytes): Address 07h to 0Bh.
3. Alarm (6 bytes): Address 0Ch to 11h.
4. User SRAM (2 bytes): Address 12h to 13h.
There are no addresses above 13h.
ISL1208


Podobny numer części - ISL1208IB8

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Intersil Corporation
ISL1208IB8 INTERSIL-ISL1208IB8 Datasheet
348Kb / 21P
   Low Power RTC with Battery Backed SRAM
ISL1208IB8 INTERSIL-ISL1208IB8 Datasheet
406Kb / 24P
   Low Power RTC with Battery Backed SRAM
logo
Renesas Technology Corp
ISL1208IB8 RENESAS-ISL1208IB8 Datasheet
1,010Kb / 24P
   I2C Real Time Clock/Calendar, Low Power RTC with Battery Backed SRAM
logo
Intersil Corporation
ISL1208IB8-TK INTERSIL-ISL1208IB8-TK Datasheet
348Kb / 21P
   Low Power RTC with Battery Backed SRAM
ISL1208IB8-TK INTERSIL-ISL1208IB8-TK Datasheet
406Kb / 24P
   Low Power RTC with Battery Backed SRAM
More results

Podobny opis - ISL1208IB8

ProducentNumer częściArkusz danychSzczegółowy opis
logo
HAOYU MICROELECTRONIC.,...
HYM8563 HAOYU-HYM8563 Datasheet
166Kb / 12P
   I2C Real Time Clock/Calendar
logo
NXP Semiconductors
PCF8563 NXP-PCF8563_11 Datasheet
466Kb / 45P
   Real-time clock/calendar
Rev. 9-16 June 2011
PCF8563TF4.118 NXP-PCF8563TF4.118 Datasheet
492Kb / 50P
   Real-time clock/calendar
Rev. 10-3 April 2012
PCF8563 PHILIPS-PCF8563 Datasheet
692Kb / 30P
   Real-time clock/calendar
16 April 1999
logo
Xicor Inc.
X1205 XICOR-X1205 Datasheet
407Kb / 22P
   Real Time Clock/Calendar
logo
NXP Semiconductors
PCA8565 NXP-PCA8565 Datasheet
813Kb / 39P
   Real time clock/calendar
Rev. 02-16 June 2009
logo
OKI electronic componet...
MSM58321 OKI-MSM58321 Datasheet
121Kb / 16P
   REAL TIME CLOCK/CALENDAR
logo
NXP Semiconductors
PCF8563 NXP-PCF8563 Datasheet
175Kb / 32P
   Real-time clock/calendar
Rev. 06-21 February 2008
logo
Tiger Electronic Co.,Lt...
PCF8563 TGS-PCF8563 Datasheet
2Mb / 23P
   Real-time Clock/Calendar
logo
NXP Semiconductors
PCF8563TS-T NXP-PCF8563TS-T Datasheet
492Kb / 50P
   Real-time clock/calendar
Rev. 10-3 April 2012
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com