RDA5888E View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

RDA5888E

Fully Integrated, Low Power Analog TV On a Chip

Unspecified 

RDA Microelectronics, Inc. RDA5888E-Fully Integrated SOC for ATV

Control Interface

RDA5888E enable software programming through I2C interface. Software controls chip working states, and

allows user read status registers to get operation result through I2C interface.

The I2C interface of RDA5888E is compliant to I2C-Bus Specification 2.1(Fast-mode, bit rate up to 400Kbit/s).

It includes two pins: SCLK and SDA. SCLK is an input pin; SDA is a bi-direction pin.

The I2C interface transfer begins with START condition, a command byte and data bytes, each byte has a

followed ACK (or NACK) bit, and ends with STOP condition. The command byte includes a 7-bit device address

{chip_id[6:0](default is 7'b1100_010)} and a r/w bit. The ACK (or NACK) is always sent out by the receiver. When

in write transfer process, data bytes are written out from MCU, and when in read transfer process, data bytes are read

out from RDA5888E. The RDA5888E contains status/control registers. These read/write registers are addressed as

sub-address on the I2C bus. RDA5888E I2C interface supports both single and sequential register access. Software

could follow the following ways to perform register read/write access:

Random access single write

Start Device W A Register address A Register data[15:8] A Register data[7:0] A Stop

address

Random access single read

Start Device W A Register A

address

address

Registe A Registe N

stop

Data[15:8]

Data[7:0]

Ｗ: Write Bit (0: write; 1: read)

A: Acknowledge Bit (ACK)

N: Not Acknowledge Bit (NO ACK)

start Device R A

address

For random access single write transfer, MCU sends out the START signal, RDA5880’s device address and 1 bit

write signal in sequence to the I2C bus. After receiving RDA5888E’ s ACK signal, MCU sends out the target

register’s address (8 bits) to RDA5888E and then programs this register with proper data (8 bits ). A STOP signal is

sent out by MCU to end this transfer when programming is finished.

For random access single read transfer, MCU first sends out the START signal, the RDA5888E’s device address and

1 bit write signal to the I2C bus. After receiving RDA5888E’s ACK signal, MCU sends the target register’s address

to the interface. Then MCU should send another command byte, including a RESTART signal, the RDA5888E’s

device address and 1 bit read signal. RDA5888E will send the register’s data to MCU through I2C bus. After the byte

has been received, MCU should send a NO ACK response signal and a STOP signal to finish this read transfer.

The information contained herein is the exclusive property of RDA and shall not be distributed, reproduced, or disclosed in whole

or in part without prior written permission of RDA.

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