Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

DS1305 Datasheet(PDF) 5 Page - Dallas Semiconductor

Part No. DS1305
Description  Serial Alarm Real-Time Clock
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

DS1305 Datasheet(HTML) 5 Page - Dallas Semiconductor

  DS1305_05 Datasheet HTML 1Page - Dallas Semiconductor DS1305_05 Datasheet HTML 2Page - Dallas Semiconductor DS1305_05 Datasheet HTML 3Page - Dallas Semiconductor DS1305_05 Datasheet HTML 4Page - Dallas Semiconductor DS1305_05 Datasheet HTML 5Page - Dallas Semiconductor DS1305_05 Datasheet HTML 6Page - Dallas Semiconductor DS1305_05 Datasheet HTML 7Page - Dallas Semiconductor DS1305_05 Datasheet HTML 8Page - Dallas Semiconductor DS1305_05 Datasheet HTML 9Page - Dallas Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 21 page
background image
DS1305
5 of 21
RECOMMENDED LAYOUT FOR CRYSTAL
CLOCK ACCURACY
The accuracy of the clock is dependent upon the accuracy of the crystal and the accuracy of the match
between the capacitive load of the oscillator circuit and the capacitive load for which the crystal was
trimmed. Additional error is added by crystal frequency drift caused by temperature shifts. External
circuit noise coupled into the oscillator circuit can result in the clock running fast. Refer to Application
Note 58, “Crystal Considerations with Dallas Real-Time Clocks” for detailed information.
CLOCK, CALENDAR, AND ALARM
The time and calendar information is obtained by reading the appropriate register bytes. The RTC
registers and user RAM are illustrated in Figure 2. The time, calendar, and alarm are set or initialized by
writing the appropriate register bytes. Note that some bits are set to 0. These bits always read 0 regardless
of how they are written. Also note that registers 12h to 1Fh (read) and registers 92h to 9Fh are reserved.
These registers always read 0 regardless of how they are written. The contents of the time, calendar, and
alarm registers are in the BCD format. The day register increments at midnight. Values that correspond to
the day of week are user-defined but must be sequential (e.g., if 1 equals Sunday, 2 equals Monday and so
on). Illogical time and date entries result in undefined operation.
Except where otherwise noted, the initial power on state of all registers is not defined. Therefore, it is
important to enable the oscillator (EOSC = 0) and disable write protect (WP = 0) during initial
configuration.
WRITING TO THE CLOCK REGISTERS
The internal time and date registers continue to increment during write operations. However, the
countdown chain is reset when the seconds register is written. Writing the time and date registers within
one second after writing the seconds register ensures consistent data.
Terminating a write before the last bit is sent aborts the write for that byte.
READING FROM THE CLOCK REGISTERS
Buffers are used to copy the time and date register at the beginning of a read. When reading in burst
mode, the user copy is static while the internal registers continue to increment.
Local ground plane (Layer 2)
crystal
X1
X2
GND


Similar Part No. - DS1305_05

ManufacturerPart No.DatasheetDescription
Dallas Semiconductor
Dallas Semiconductor
DS1305E DALLAS-DS1305E Datasheet
257Kb / 22P
   Serial Alarm Real Time Clock RTC
Maxim Integrated Products
Maxim Integrated Produc...
DS1305E MAXIM-DS1305E Datasheet
315Kb / 22P
   Serial Alarm Real-Time Clock
Rev 12/09
DS1305E MAXIM-DS1305E Datasheet
363Kb / 22P
   Serial Alarm Real-Time Clock
19-5055; Rev 4 / 15
DS1305E++ MAXIM-DS1305E+ Datasheet
315Kb / 22P
   Serial Alarm Real-Time Clock
Rev 12/09
DS1305E++ MAXIM-DS1305E+ Datasheet
363Kb / 22P
   Serial Alarm Real-Time Clock
19-5055; Rev 4 / 15
More results

Similar Description - DS1305_05

ManufacturerPart No.DatasheetDescription
Maxim Integrated Products
Maxim Integrated Produc...
DS1306 MAXIM-DS1306 Datasheet
324Kb / 22P
   Serial Alarm Real-Time Clock
Rev 12/09
DS1305 MAXIM-DS1305_V01 Datasheet
363Kb / 22P
   Serial Alarm Real-Time Clock
19-5055; Rev 4 / 15
DS1306 MAXIM-DS1306_V01 Datasheet
377Kb / 22P
   Serial Alarm Real-Time Clock
19-5056; Rev 4 / 1 5
Dallas Semiconductor
Dallas Semiconductor
DS1306 DALLAS-DS1306_05 Datasheet
553Kb / 21P
   Serial Alarm Real-Time Clock
Maxim Integrated Products
Maxim Integrated Produc...
DS1305 MAXIM-DS1305 Datasheet
315Kb / 22P
   Serial Alarm Real-Time Clock
Rev 12/09
Dallas Semiconductor
Dallas Semiconductor
DS1306 DALLAS-DS1306 Datasheet
277Kb / 20P
   Serial Alarm Real Time Clock RTC
DS1305 DALLAS-DS1305 Datasheet
257Kb / 22P
   Serial Alarm Real Time Clock RTC
STMicroelectronics
STMicroelectronics
M41T80 STMICROELECTRONICS-M41T80_11 Datasheet
440Kb / 27P
   Serial access real-time clock with alarm
M41T81 STMICROELECTRONICS-M41T81_08 Datasheet
259Kb / 30P
   Serial access real-time clock with alarm
M41T81 STMICROELECTRONICS-M41T81_06 Datasheet
301Kb / 30P
   Serial access Real-Time Clock with alarm
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.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   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