TLC320AC02IPM datasheet(78/84 Pages) TI

78 / 84 page

D–2

TMS320C5x

CLKOUT

FSX

FSR

CLKX

CLKR

TLC320AC02

MCLK

DIN

DOUT

SCLK

FSD

TLC320AC02

MCLK

DIN

DOUT

SCLK

FSD

Master Mode

Slave Mode

NOTE A: Terminal numbers shown are for the FN package.

Figure D–1. Master With Slave (to DSP Interface)

HARDWARE AND SOFTWARE SOLUTION

Once the hardware connections are completed, the issue becomes distinguishing one channel from

another. Fortunately, this is very easy to do in software and adds very little overhead. The mode that the

AC02s run in is called master/slave mode. One AC02 is the master and all of the rest of the AC02s are

slaves. The master can be distinguished from all of the slaves by examining the least significant bit (LSB)

in the receive word coming from the AC02. The master has a 0 in the LSB and all of the slaves have a 1

in the LSB.

The AC02s in master/slave mode take turns communicating with the DSP serial port. They do this is a round

robin or circular fashion. Synchronizing the system involves looking for the master AC02 and then starting

the software associated with the first AC02. All other AC02s follow in order. It is possible to have different

software for each AC02.

A reference design was constructed using a TMS320C5X DSP starter kit (DSK). The AC02s were

connected to the TDM serial port which is available at the headers on the edge of the DSK.

A listing of the DSK assembly code for a simple stereo input/output program is included in the following

section.

TLC320AC02IPM Datasheet(PDF) 78 Page - Texas Instruments