參數(shù)資料
型號(hào)： X9259UV24IZ-2.7
廠商： Intersil
文件頁(yè)數(shù)： 18/21頁(yè)
文件大?。?/td> 0K
描述： IC XDCP QUAD 256TAP 50K 24-TSSOP
標(biāo)準(zhǔn)包裝： 62
系列： XDCP™
接片： 256
電阻（歐姆）： 50k
電路數(shù)： 4
溫度系數(shù)： 標(biāo)準(zhǔn)值 ±300 ppm/°C
存儲(chǔ)器類型： 非易失
接口： I²C（設(shè)備位址）
電源電壓： 2.7 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 24-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 24-TSSOP
包裝： 管件
6
FN8169.5
April 13, 2007
Serial Interface
The X9259 supports a bidirectional bus oriented protocol.
The protocol defines any device that sends data onto the
bus as a transmitter and the receiving device as the receiver.
The device controlling the transfer is a master and the
device being controlled is the slave. The master always
initiates data transfers and provide the clock for both
transmit and receive operations. Therefore, the X9259
operates as a slave device in all applications.
All 2-wire interface operations must begin with a START,
followed by an Identification Byte, that selects the X9259. All
communication over the 2-wire interface is conducted by
sending the MSB of each byte of data first.
Clock and Data Conventions
Data states on the SDA line can change only during SCL
LOW periods. SDA state changes during SCL HIGH are
reserved for indicating START and STOP conditions. See
Figure 2. On power up of the X9259 the SDA pin is in the
input mode.
START Condition
All commands to the X9259 are preceded by the start
condition, which is a HIGH to LOW transition of SDA while
SCL is HIGH. The X9259 continuously monitors the SDA
and SCL lines for the START condition and does not
respond to any command until this condition is met. See
Figure 2.
STOP Condition
All communications must be terminated by a STOP
condition, which is a LOW to HIGH transition of SDA while
SCL is HIGH. See Figure 2. The STOP condition is also
used to place the device into the Standby Power mode after
a Read sequence. A STOP condition can only be issued
after the transmitting device has released the bus.
Acknowledge
An ACK, Acknowledge, is a software convention used to
indicate a successful data transfer. The transmitting device,
either master or slave, releases the SDA bus after
transmitting eight bits. During the ninth clock cycle, the
receiver pulls the SDA line LOW to acknowledge the
reception of the eight bits of data. See Figure 3.
The X9259 responds with an ACK after recognition of a
START condition followed by a valid Identification Byte, and
once again after successful receipt of an Instruction Byte.
The X9259 also responds with an ACK after receiving a Data
Byte after a Write Instruction.
A valid Identification Byte contains the Device Type Identifier
0101, as the four MSBs, and the Device Address bits
matching the logic states of pins A3, A2, A1, and A0, as the
four LSBs. See Figure 4.
In the Read mode, the device transmits eight bits of data,
releases the SDA line, and then monitors the line for an
ACK. The device continues transmitting data if an ACK is
detected. The device terminates further data transmissions if
an ACK is not detected. The master must then issue a STOP
condition to place the device into a known state.
During the internal non-volatile Write operation, the X9259
ignores the inputs at SDA and SCL, and does not issue an
ACK after Identification bytes.
X9259
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X9259UV24IZR5279 制造商:Intersil Corporation 功能描述:
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X9259UV24IZT2R5279 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述:
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