Electronic Components Datasheet Search
  English  ▼

Delete All


Preview PDF Download HTML

CAT24WC66 Datasheet(PDF) 5 Page - Catalyst Semiconductor

Part No. CAT24WC66
Description  64K-Bit I2C Serial CMOS EEPROM
Download  10 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  CATALYST [Catalyst Semiconductor]
Homepage  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT24WC66 Datasheet(HTML) 5 Page - Catalyst Semiconductor

  CAT24WC66 Datasheet HTML 1Page - Catalyst Semiconductor CAT24WC66 Datasheet HTML 2Page - Catalyst Semiconductor CAT24WC66 Datasheet HTML 3Page - Catalyst Semiconductor CAT24WC66 Datasheet HTML 4Page - Catalyst Semiconductor CAT24WC66 Datasheet HTML 5Page - Catalyst Semiconductor CAT24WC66 Datasheet HTML 6Page - Catalyst Semiconductor CAT24WC66 Datasheet HTML 7Page - Catalyst Semiconductor CAT24WC66 Datasheet HTML 8Page - Catalyst Semiconductor CAT24WC66 Datasheet HTML 9Page - Catalyst Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 10 page
background image
Doc. No. 1037, Rev. H
The features of the I2C bus protocol are defined as
(1) Data transfer may be initiated only when the bus is
not busy.
(2) During a data transfer, the data line must remain
stable whenever the clock line is high. Any changes
in the data line while the clock line is high will be
interpreted as a START or STOP condition.
START Condition
The START Condition precedes all commands to the
device, and is defined as a HIGH to LOW transition of
SDA when SCL is HIGH. The CAT24WC66 monitors the
SDA and SCL lines and will not respond until this
condition is met.
STOP Condition
A LOW to HIGH transition of SDA when SCL is HIGH
determines the STOP condition. All operations must end
with a STOP condition.
The bus Master begins a transmission by sending a
START condition. The Master sends the address of the
particular slave device it is requesting. The four most
significant bits of the 8-bit slave address are fixed as
1010 (Fig. 5). The next three bits (A2, A1, A0) are the
device address bits; up to eight 64K devices may to be
connected to the same bus. These bits must compare
Figure 4. Acknowledge Timing
Figure 5. Slave Address Bits
to the hardwired input pins, A2, A1 and A0. The last bit
of the slave address specifies whether a Read or Write
operation is to be performed. When this bit is set to 1, a
Read operation is selected, and when set to 0, a Write
operation is selected.
After the Master sends a START condition and the slave
address byte, the CAT24WC66 monitors the bus and
responds with an acknowledge (on the SDA line) when
its address matches the transmitted slave address. The
CAT24WC66 then performs a Read or Write operation
depending on the state of the R/
W bit.
After a successful data transfer, each receiving device is
required to generate an acknowledge. The Acknowledg-
ing device pulls down the SDA line during the ninth clock
cycle, signaling that it received the 8 bits of data.
The CAT24WC66 responds with an acknowledge after
receiving a START condition and its slave address. If the
device has been selected along with a write operation,
it responds with an acknowledge after receiving each 8-
bit byte.
When the CAT24WC66 begins a READ mode it trans-
mits 8 bits of data, releases the SDA line, and monitors
the line for an acknowledge. Once it receives this ac-
knowledge, the CAT24WC66 will continue to transmit
data. If no acknowledge is sent by the Master, the device
terminates data transmission and waits for a STOP
condition. The master must then issue a stop condition
to return the CAT24WC66 to the standby power mode
and place the device in a known state.

Html Pages

1  2  3  4  5  6  7  8  9  10 

Datasheet Download

Go To PDF Page

Link URL

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

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   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