PCM3060PWR datasheet(27/45 Pages) BURR-BROWN

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Packet Protocol

SDA

SCL

1-7

1-8

Slave Address

ACK

DATA

ACK

DATA

ACK

R/W

:ReadOperationif1;Otherwise,WriteOperation

ACK: AcknowledgementofaByteif0,not AcknowledgementofaByteif1

DATA:8Bits(Byte)

Stop

Condition

Start

Condition

T0049-06

Write Operation

Transmitter

Data Type

Slave Address

ACK

WriteData1

WriteData2

Reg Address

M:MasterDeviceS:SlaveDeviceSt:StartCondition

:Write

ACK: AcknowledgementSp:StopCondition

R0002-04

PCM3060

SLAS533 – MARCH 2007

The PCM3060 has 7 bits for its own slave address. The first six bits (MSBs) of the slave address are factory

preset to 10 0011. The next bit of the address byte is the device select bit, which can be user-defined by the

ADR pin (pin 27). Two PCM3060s at maximum can be connected on the same bus at one time. Each PCM3060

responds when it receives its own slave address.

A master device must control packet protocol, which consists of a start condition, slave address with read/write

bit, data if write or acknowledgement if read, and stop condition. The PCM3060 supports the slave receiver

function.

The PCM3060 supports the receiver function. A master can write to any PCM3060 registers using single or

multiple accesses. The master sends a PCM3060 slave address with a write bit, a register address, and the

data. If multiple access is required, the address is that of the starting register, followed by the data to be

transferred. When the data are received properly, the index register is incremented by 1 automatically. When the

index register reaches 4Ah, the next value is 40h. When undefined registers are accessed, the PCM3060 does

not send an acknowledgement. Figure 31 is a diagram of the write operation. The register address and the write

data are 8-bit in MSB-first format.

Figure 31. Framework for Write Operation

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