Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

ISL12057EVALZ Scheda tecnica(PDF) 8 Page - Renesas Technology Corp

Il numero della parte ISL12057EVALZ
Spiegazioni elettronici  Low Cost and Low Power I2C RTC Real Time Clock/Calendar with Alarm Function and Dual IRQ Pins
Download  18 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

ISL12057EVALZ Scheda tecnica(HTML) 8 Page - Renesas Technology Corp

Back Button ISL12057EVALZ Datasheet HTML 4Page - Renesas Technology Corp ISL12057EVALZ Datasheet HTML 5Page - Renesas Technology Corp ISL12057EVALZ Datasheet HTML 6Page - Renesas Technology Corp ISL12057EVALZ Datasheet HTML 7Page - Renesas Technology Corp ISL12057EVALZ Datasheet HTML 8Page - Renesas Technology Corp ISL12057EVALZ Datasheet HTML 9Page - Renesas Technology Corp ISL12057EVALZ Datasheet HTML 10Page - Renesas Technology Corp ISL12057EVALZ Datasheet HTML 11Page - Renesas Technology Corp ISL12057EVALZ Datasheet HTML 12Page - Renesas Technology Corp Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 18 page
background image
ISL12057
FN6755 Rev 2.00
Page 8 of 18
Sep 25, 2015
IRQ1/FOUT (Interrupt Output 1/Frequency Output)
This dual-function pin can be used as an alarm interrupt or a
frequency output pin. The IRQ1/FOUT mode is selected via the
control register (address 0Eh). The IRQ1/FOUT is an open
drain output.
This pin has a default output of 32.768kHz at power-up.
• Interrupt Mode. The pin provides an interrupt signal output.
This signal notifies a host processor that an alarm has
occurred and requests action.
• Frequency Output Mode. The pin outputs a clock signal
that is related to the crystal frequency. The frequency output
is user selectable and is enabled via the I2C bus.
IRQ2 (Interrupt Output 2)
The IRQ2 pin is used as an Alarm1 interrupt and/or an Alarm2
interrupt. The IRQ2 mode is selected via the control register
(address 0Eh). The IRQ2 is an open drain output.
This pin is high impedance at power-up.
The pin provides an interrupt signal output. This signal notifies
a host processor that an alarm has occurred and requests
action.
Serial Clock (SCL)
The SCL input is used to clock all serial data into and out of the
device. The input buffer on this pin is always active (not gated).
The SCL pin can accept a logic high voltage up to 5.5V.
Serial Data (SDA)
SDA is a bi-directional pin used to transfer data into and out of
the device. It has an open drain output and may be ORed with
other open drain or open collector outputs. The input buffer is
always active (not gated) in normal mode.
An open drain output requires the use of a pull-up resistor, and
it can accept a pull-up voltage up to 5.5V. The output circuitry
controls the fall time of the output signal with the use of a
slope-controlled pull-down. The circuit is designed for 400kHz
I2C interface speeds.
NOTE: Parts will work with SDA pull-up voltage above the VPULLUP
limit, but the tAA and tFin the I2C parameters are not guaranteed.
VDD, GND
These are chip power supply and ground pins. The device will
have full operation with a power supply from 1.8V to 3.6VDC,
and a timekeeping function with a power supply from 1.4V to
1.8V.
A 0.1µF decoupling capacitor is recommended on the VDD pin
to ground.
Functional Description
Real Time Clock Operation
The Real Time Clock (RTC) uses an external 32.768kHz
quartz crystal to maintain an accurate internal representation of
second, minute, hour, day of week, date, month, and year. The
RTC also has leap-year correction. The RTC corrects for
months having fewer than 31 days and has a bit that controls
24-hour or AM/PM format. The clock begins incrementing after
power-up with valid oscillator condition.
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, RTC performance also depends 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.
I2C Serial Interface
The ISL12057 has an I2C serial bus interface that provides
access to the real-time clock registers, the control and status
registers, and the alarm registers. The I2C serial interface is
compatible with other industry I2C serial bus protocols using a
bi-directional data signal (SDA) and a clock signal (SCL).
Register Descriptions
The registers are accessible following a slave byte of
“1101000x” and they read or write to addresses [00h:0Fh]. The
defined addresses and default values are described in Table 1.
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 address will wrap around from 0Fh to 00h.
The registers are divided into three sections:
1. Real Time Clock (7 bytes): Address 00h to 06h
2. Alarm (7 bytes): Address 07h to 0Dh
3. Control and Status (2 bytes): Address 0Eh to 0Fh
There are no addresses above 0Fh.
A register can be read by performing a random read at any
address at any time. This returns the contents of that register
location. Additional registers are read by performing a
sequential read. For the RTC registers, the read instruction
latches all clock registers into a buffer, so an update of the
clock does not change the time being read. A sequential read
will not result in the output of data from the memory array. At
the end of a read, the master supplies a stop condition to end
the operation and free the bus. After a read or write instruction,
the address remains at the previous address plus one, so the
user can execute a current address read and continue reading
the next register.


Codice articolo simile - ISL12057EVALZ

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Intersil Corporation
ISL12057 INTERSIL-ISL12057 Datasheet
298Kb / 17P
   Low Cost and Low Power I2C RTC Real Time Clock/Calendar
ISL12057 INTERSIL-ISL12057 Datasheet
768Kb / 6P
   High-Accuracy RTC Modules, Feature-Rich RTCs
ISL12057 INTERSIL-ISL12057 Datasheet
9Mb / 44P
   Providing high-performance solutions for every link in the signal chain
ISL12057IBZ INTERSIL-ISL12057IBZ Datasheet
298Kb / 17P
   Low Cost and Low Power I2C RTC Real Time Clock/Calendar
ISL12057IBZ-T INTERSIL-ISL12057IBZ-T Datasheet
298Kb / 17P
   Low Cost and Low Power I2C RTC Real Time Clock/Calendar
More results

Descrizione simile - ISL12057EVALZ

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Renesas Technology Corp
ISL12058 RENESAS-ISL12058 Datasheet
837Kb / 20P
   Low Cost and Low Power I2C-Bus Real Time Clock/Calendar Low Power and Low Cost RTC with Alarm Function
logo
Intersil Corporation
ISL12057 INTERSIL-ISL12057 Datasheet
298Kb / 17P
   Low Cost and Low Power I2C RTC Real Time Clock/Calendar
logo
Renesas Technology Corp
ISL12059 RENESAS-ISL12059 Datasheet
513Kb / 11P
   Low Cost and Low Power I2C Bus Real Time Clock/Calendar Low Power and Low Cost RTC
logo
Intersil Corporation
ISL12059 INTERSIL-ISL12059 Datasheet
196Kb / 11P
   Low Cost and Low Power I2C Bus??Real Time Clock/Calendar
ISL12058 INTERSIL-ISL12058 Datasheet
329Kb / 19P
   Low Cost and Low Power I2C-Bus??Real Time Clock/Calendar
logo
NXP Semiconductors
PCF85063A NXP-PCF85063A Datasheet
715Kb / 65P
   Tiny Real-Time Clock/calendar with alarm function and I2C-bus
Rev. 7-30 March 2018
PCF85063A NXP-PCF85063A_V01 Datasheet
698Kb / 55P
   Tiny Real-Time Clock/calendar with alarm function and I2C-bus
Rev. 7.1 - 8 November 2023
PCF85063ATL NXP-PCF85063ATL Datasheet
544Kb / 54P
   Tiny Real-Time Clock/calendar with alarm function and I2C-bus
Rev. 2-15 April 2013
PCA85063A NXP-PCA85063A Datasheet
677Kb / 59P
   Automotive tiny Real-Time Clock/calendar with alarm function and I2C-bus
Rev. 4-30 March 2018
PCF8523 NXP-PCF8523_12 Datasheet
700Kb / 75P
   Real-Time Clock (RTC) and calendar
Rev. 4-5 July 2012
More results


Html Pages

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


Scheda tecnica Scarica

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEETIT.COM
Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   scambio Link   |   Ricerca produttore
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