Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

DS9034PCX Datasheet(PDF) 7 Page - Dallas Semiconductor

Part # DS9034PCX
Description  256K NV Y2KC Timekeeping RAM
Download  21 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS9034PCX Datasheet(HTML) 7 Page - Dallas Semiconductor

Back Button DS9034PCX Datasheet HTML 3Page - Dallas Semiconductor DS9034PCX Datasheet HTML 4Page - Dallas Semiconductor DS9034PCX Datasheet HTML 5Page - Dallas Semiconductor DS9034PCX Datasheet HTML 6Page - Dallas Semiconductor DS9034PCX Datasheet HTML 7Page - Dallas Semiconductor DS9034PCX Datasheet HTML 8Page - Dallas Semiconductor DS9034PCX Datasheet HTML 9Page - Dallas Semiconductor DS9034PCX Datasheet HTML 10Page - Dallas Semiconductor DS9034PCX Datasheet HTML 11Page - Dallas Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 21 page
background image
DS1554
7 of 21
SETTING THE CLOCK
The 8th bit, B7 of the Control Register is the write bit. Setting the write bit to a 1, like the read bit, halts
updates to the DS1554 (7FF8h-7FFFh) registers. After setting the write bit to a 1, RTC Registers can be
loaded with the desired RTC count (day, date, and time) in 24-hour BCD format. Setting the write bit to a
0 then transfers the values written to the internal RTC Registers and allows normal operation to resume.
CLOCK ACCURACY (DIP MODULE)
The DS1554 is guaranteed to keep time accuracy to within
±1 minute per month at 25°C. The RTC is
calibrated at the factory by Dallas Semiconductor using nonvolatile tuning elements. The DS1554 does
not require additional calibration and, in most applications, temperature deviations will have a negligible
effect on accuracy. For this reason, methods of field clock calibration are not available and not necessary.
Attempts to calibrate the RTC that may be used with similar device types (M48T5x family) will not have
any effect even though the DS1554 appears to accept calibration data.
CLOCK ACCURACY (POWERCAP MODULE)
The DS1554 and DS9034PCX are each individually tested for accuracy. Once mounted together, the
module is guaranteed to keep time accuracy to within
±1.53 minutes per month (35 ppm) at 25°C.
FREQUENCY TEST MODE
The DS1554 frequency test mode uses the open drain IRQ /FT output. With the oscillator running, the
IRQ
/FT output will toggle at 512 Hz when the FT bit is a 1, the Alarm Flag Enable bit (AE) is a 0, and
the Watchdog Steering bit (WDS) is a 1 or the Watchdog Register is reset (Register 7FF7h = 00h). The
IRQ
/FT output and the frequency test mode can be used as a measure of the actual frequency of the
32.768 kHz RTC oscillator. The IRQ /FT pin is an open drain output which requires a pullup resistor for
proper operation. The FT bit is cleared to a 0 on power-up.
USING THE CLOCK ALARM
The alarm settings and control for the DS1554 reside within Registers 7FF2h-7FF5h. Register 7FF6h
contains two alarm enable bits: Alarm Enable (AE) and Alarm in Backup Enable (ABE). The AE and
ABE bits must be set as described below for the IRQ /FT output to be activated for a matched alarm
condition.
The alarm can be programmed to activate on a specific day of the month or repeat every day, hour,
minute, or second. It can also be programmed to go off while the DS1554 is in the battery backed state of
operation to serve as a system wake-up. Alarm mask bits AM1-AM4 control the alarm mode. Table 3
shows the possible settings. Configurations not listed in the table default to the once per second mode to
notify the user of an incorrect alarm setting.


Similar Part No. - DS9034PCX

ManufacturerPart #DatasheetDescription
logo
Dallas Semiconductor
DS9034PCX DALLAS-DS9034PCX Datasheet
263Kb / 20P
   RAMified Watchdog Timekeeper
logo
Maxim Integrated Produc...
DS9034PCX MAXIM-DS9034PCX Datasheet
116Kb / 4P
   PowerCap with Crystal
19-5584; Rev 10/10
logo
Dallas Semiconductor
DS9034PCX DALLAS-DS9034PCX Datasheet
268Kb / 19P
   4MEG NV Y2KC Timekeeping RAM
DS9034PCX DALLAS-DS9034PCX Datasheet
247Kb / 17P
   Y2KC Nonvolatile Timekeeping RAM
DS9034PCX DALLAS-DS9034PCX Datasheet
187Kb / 11P
   Nonvolatile Timekeeping RAM
More results

Similar Description - DS9034PCX

ManufacturerPart #DatasheetDescription
logo
Dallas Semiconductor
DS1557 DALLAS-DS1557 Datasheet
268Kb / 19P
   4MEG NV Y2KC Timekeeping RAM
DS1743 DALLAS-DS1743 Datasheet
247Kb / 17P
   Y2KC Nonvolatile Timekeeping RAM
DS1746 DALLAS-DS1746 Datasheet
224Kb / 18P
   Y2KC Nonvolatile Timekeeping RAM
logo
Maxim Integrated Produc...
DS1742 MAXIM-DS1742_V01 Datasheet
365Kb / 17P
   Y2KC Nonvolatile Timekeeping RAM
19-6715; Rev 6/13
logo
Dallas Semiconductor
DS1742 DALLAS-DS1742 Datasheet
163Kb / 12P
   Y2KC Nonvolatile Timekeeping RAM
logo
ARTSCHIP ELECTRONICS CO...
DS1743 ARTSCHIP-DS1743 Datasheet
497Kb / 15P
   Y2KC Nonvolatile Timekeeping RAM
logo
Dallas Semiconductor
DS1543 DALLAS-DS1543 Datasheet
199Kb / 17P
   64k NV Timekeeping RAM
logo
Maxim Integrated Produc...
DS1742 MAXIM-DS1742 Datasheet
476Kb / 16P
   Y2KC Nonvolatile Timekeeping RAMwww.
REV: 102808
logo
Dallas Semiconductor
DS1643 DALLAS-DS1643 Datasheet
81Kb / 11P
   Nonvolatile Timekeeping RAM
logo
Maxim Integrated Produc...
DS1647 MAXIM-DS1647 Datasheet
383Kb / 12P
   Nonvolatile Timekeeping RAM
1955 96 ; Rev 10/10
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


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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