Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

DS1845X-050 Datasheet(PDF) 4 Page - Dallas Semiconductor

Part # DS1845X-050
Description  Dual NV Potentiometer and Memory
Download  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1845X-050 Datasheet(HTML) 4 Page - Dallas Semiconductor

  DS1845X-050 Datasheet HTML 1Page - Dallas Semiconductor DS1845X-050 Datasheet HTML 2Page - Dallas Semiconductor DS1845X-050 Datasheet HTML 3Page - Dallas Semiconductor DS1845X-050 Datasheet HTML 4Page - Dallas Semiconductor DS1845X-050 Datasheet HTML 5Page - Dallas Semiconductor DS1845X-050 Datasheet HTML 6Page - Dallas Semiconductor DS1845X-050 Datasheet HTML 7Page - Dallas Semiconductor DS1845X-050 Datasheet HTML 8Page - Dallas Semiconductor DS1845X-050 Datasheet HTML 9Page - Dallas Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 13 page
background image
DS1845
4 of 13
Device Addressing: The DS1845 must receive an 8-bit device address word following a start condition
to enable a specific device for a read or write operation. The address word is clocked into the DS1845
MSB to LSB. The address word consists of Ah (1010) followed by A2, A1, and A0 then the R/W
(READ/WRITE) bit. If the R/W bit is high, a read operation is initiated. The R/W is low, a write
operation is initiated. For a device to become active, the values of A2, A1 and A0 must be the same as
the hard-wired address pins on the DS1845. Upon a match of written and hard-wired addresses, the
DS1845 will output a zero for one clock cycle as an acknowledge. If the address does not match the
DS1845 returns to a low-power mode.
Write Operations: After receiving a matching address byte with the R/W bit set low, the device goes
into the write mode of operation. The master must transmit an 8-bit EEPROM memory address to the
device to define the address where the data is to be written. After the reception of this byte, the DS1845
will transmit a zero for one clock cycle to acknowledge the receipt of the address. The master must then
transmit an 8-bit data word to be written into this address. The DS1845 will again transmit a zero for one
clock cycle to acknowledge the receipt of the data. At this point the master must terminate the write
operation with a stop condition. The DS1845 then enters an internally timed write process Tw to the
EEPROM memory. All inputs are disabled during this byte write cycle.
The DS1845 is capable of an 8-byte page write. A page write is initiated the same way as a byte write,
but the master does not send a stop condition after the 1
st byte. Instead, after the slave acknowledges
receipt of the data byte, the master can send up to seven more bytes using the same nine-clock sequence.
The master must terminate the write cycle with a stop condition or the data clocked into the DS1845 will
not be latched into permanent memory.
Acknowledge Polling: Once the internally-timed write has started and the DS1845 inputs are disabled,
acknowledge polling can be initiated. The process involves transmitting a start condition followed by the
device address. The R/W bit signifies the type of operation that is desired. The read or write sequence
will only be allowed to proceed if the internal write cycle has completed and the DS1845 responds with a
zero.
Read Operations: After receiving a matching address byte with the R/W bit set high, the device goes
into the read mode of operation. There are three read operations: current address read, random read and
sequential address read.
CURRENT ADDRESS READ
The DS1845 has an internal address register that maintains the address used during the last read or write
operation, incremented by one. This data is maintained as long as VCC is valid. If the most recent
address was the last byte in memory, then the register resets to the first address. This address stays valid
between operations as long as power is available.
Once the device address is clocked in and acknowledged by the DS1845 with the R/W bit set to high, the
current address data word is clocked out. The master does not respond with a zero, but does generate a
stop condition afterwards.


Similar Part No. - DS1845X-050

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
DS1845 MAXIM-DS1845 Datasheet
202Kb / 14P
   Dual NV Potentiometer and Memory
011006
More results

Similar Description - DS1845X-050

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
DS1845 MAXIM-DS1845 Datasheet
202Kb / 14P
   Dual NV Potentiometer and Memory
011006
DS1846 MAXIM-DS1846 Datasheet
248Kb / 18P
   NV Tri-Potentiometer, Memory, and MicroMonitor
042902
DS1881 MAXIM-DS1881 Datasheet
222Kb / 16P
   Dual NV Audio Taper Digital Potentiometer
Rev 0; 1/06
DS1804 MAXIM-DS1804 Datasheet
171Kb / 8P
   NV Trimmer Potentiometer
043002
logo
Dallas Semiconductor
DS1804 DALLAS-DS1804 Datasheet
85Kb / 7P
   NV Trimmer Potentiometer
DS1855 DALLAS-DS1855 Datasheet
252Kb / 20P
   Dual Nonvolatile Digital Potentiometer and Secure Memory
logo
Maxim Integrated Produc...
DS1855 MAXIM-DS1855 Datasheet
509Kb / 21P
   Dual Nonvolatile Digital Potentiometer and Secure Memory
19-6586; Rev 2; 1/13
DS3503 MAXIM-DS3503_09 Datasheet
232Kb / 13P
   NV, I2C, Stepper Potentiometer
Rev 1; 3/09
DS3503 MAXIM-DS3503 Datasheet
209Kb / 12P
   NV, I2C, Stepper Potentiometer
Rev 0; 11/08
logo
Dallas Semiconductor
DS1848 DALLAS-DS1848 Datasheet
234Kb / 17P
   Dual Temperature-Controlled NV Variable Resistor & Memory
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13


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