參數(shù)資料
型號： TVP5154PNPRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 顏色信號轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PQFP128
封裝： PLASTIC, HTQFP-128
文件頁數(shù)： 7/77頁
文件大?。?/td> 795K
代理商： TVP5154PNPRG4
www.ti.com
5
I2C Host Interface
TVP5154
4-CHANNEL LOW-POWER PAL/NTSC/SECAM VIDEO DECODER
WITH INDEPENDENT SCALERS AND FAST LOCK
SLES163A – MARCH 2006 – REVISED JULY 2006
The I2C standard consists of two signals, serial input/output data line (SDA) and input/output clock line
(SCL), which carry information between the devices connected to the bus. The input pins I2CA0 and
I2CA1 are used to select the slave address to which the device responds. Although the I2C system can be
multimastered, the TVP5154 decoder functions as a slave device only.
Both SDA and SCL must be connected to IOVDD via pullup resistors. When the bus is free, both lines are
high. The slave address select terminals (I2CA0 and I2CA1) enable the use of four TVP5154 decoders on
the same I2C bus. At the trailing edge of reset, the status of the I2CA0 and I2CA1 lines are sampled to
determine the device address used. Table 5-1 summarizes the terminal functions of the I2C-mode host
interface. Table 5-2 shows the device address selection options.
Table 5-1. I2C Terminal Description
SIGNAL
TYPE
DESCRIPTION
I2CA0
I
Slave address selection
I2CA1
I
Slave address selection
SCL
I/O (open drain)
Input/output clock line
SDA
I/O (open drain)
Input/output data line
Table 5-2. I2C Host Interface Device Addresses
A6
A5
A4
A3
A2
A1 (I2CA1)
A0 (I2CA0)
R/W
HEX
1
0
1
0
1/0
B9/B8
1
0
1
0
1
1/0
BB/BA
1
0
1
0
1/0
BD/BC
1
0
1
1/0
BF/BE
Data transfer rate on the bus is up to 400 kbit/s. The number of interfaces connected to the bus is
dependent on the bus capacitance limit of 400 pF. The data on the SDA line must be stable during the
high period of the SCL, except for start and stop conditions. The high or low state of the data line can only
change with the clock signal on the SCL line being low. A high-to-low transition on the SDA line while the
SCL is high indicates an I2C start condition. A low-to-high transition on the SDA line while the SCL is high
indicates an I2C stop condition.
Every byte placed on the SDA must be eight bits long. The number of bytes that can be transferred is
unrestricted. Each byte must be followed by an acknowledge bit. The acknowledge-related clock pulse is
generated by the I2C master.
To simplify programming of each of the four decoder channels, a single I2C write transaction can be
transmitted to any one or more of the four cores in parallel. This reduces the time required to download
firmware or to configure the device when all channels are to be configured in the same manner. It also
enables the addresses for all registers to be common across all decoders.
I2C sub-address 0xFE contains four bits, with each bit corresponding to one of the decoder cores. If this
bit is set, I2C write transactions are sent to the corresponding decoder core. If the bit is 0, the
corresponding decoder does not receive the I2C write transactions.
I2C sub-address 0xFF contains four bits, with each bit corresponding to one of the decoder cores. If this
bit is set, I2C read transactions are sent to the corresponding decoder core. Note, only one of the bits in
this register should be set at a given time, ensuring that only one decoder core is accessed at a time for
read operations. If more than one bit is set, the lowest set bit number corresponds to the core that
responds to the read transaction.
15
I2C Host Interface
相關(guān)PDF資料
PDF描述
TVP5154PNPR COLOR SIGNAL DECODER, PQFP128
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TVP5156PNP 功能描述:視頻 IC 4Ch NTSC/PAL Video Decoder RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TVP5156PNPR 功能描述:視頻 IC 4Ch NTSC/PAL Video Decoder RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TVP5157PNP 功能描述:視頻 IC 4Ch NTSC/PAL Video Decoder RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TVP5157PNPR 功能描述:視頻 IC 4Ch NTSC/PAL Video Decoder RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TVP5158 制造商:TI 制造商全稱:Texas Instruments 功能描述:With Independent Scalers, Noise Reduction, Auto Contrast, and Flexible Output Formatter for Security and Other Multi-Channel Video Applications
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