Datasheet
TVP5150AM1
SLES209E–NOVEMBER 2007–REVISED OCTOBER 2011
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3.15.1 I
2
C Write Operation
Data transfers occur utilizing the following illustrated formats.
An I
2
C master initiates a write operation to the TVP5150AM1 decoder by generating a start condition (S)
followed by the TVP5150AM1 I
2
C slave address (see the following illustration), in MSB first bit order,
followed by a 0 to indicate a write cycle. After receiving an acknowledge from the TVP5150AM1 decoder,
the master presents the subaddress of the register, or the first of a block of registers it wants to write,
followed by one or more bytes of data, MSB first. The TVP5150AM1 decoder acknowledges each byte
after completion of each transfer. The I
2
C master terminates the write operation by generating a stop
condition (P).
Step 1 0
I
2
C Start (master) S
Step 2 7 6 5 4 3 2 1 0
I
2
C slave address (master) 1 0 1 1 1 0 X 0
Step 3 9
I
2
C Acknowledge (slave) A
Step 4 7 6 5 4 3 2 1 0
I
2
C Write register address (master) Addr Addr Addr Addr Addr Addr Addr Addr
Step 5 9
I
2
C Acknowledge (slave) A
Step 6 7 6 5 4 3 2 1 0
I
2
C Write data (master) Data Data Data Data Data Data Data Data
9
Step 7
(1)
I
2
C Acknowledge (slave) A
Step 8 0
I
2
C Stop (master) P
(1) Repeat steps 6 and 7 until all data have been written.
3.15.2 I
2
C Read Operation
The read operation consists of two phases. The first phase is the address phase. In this phase, an I
2
C
master initiates a write operation to the TVP5150AM1 decoder by generating a start condition (S) followed
by the TVP5150AM1 I
2
C slave address, in MSB first bit order, followed by a 0 to indicate a write cycle.
After receiving an acknowledge from the TVP5150AM1 decoder, the master presents the subaddress of
the register or the first of a block of registers it wants to read. After the cycle is acknowledged, the master
terminates the cycle immediately by generating a stop condition (P).
Table 3-7. Read Address
Selection
I2CSEL READ ADDRESS
0 B9h
1 BBh
20 Functional Description Copyright © 2007–2011, Texas Instruments Incorporated
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