TLC32046MJ datasheet(10/56 Pages) TI

Part #	TLC32046MJ

Description	Wide-Band Analog Interface Circuit

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FRAME SYNCHRONIZATION FUNCTIONS

Function

Frame Sync Output

Receiving serial data on DX from processor to internal DAC

FSX low

Transmitting serial data on DR from internal ADC to processor, primary communications

FSR low

Transmitting serial data on DR from Data-DR to processor, secondary communications in

dual-word (telephone interface) mode only

FSD low

TLC32046

Logic Levels

TTL or CMOS

TMS32020,

TMS320C25,

TMS320C30, or

Equivalent 16-Bit DSP

– 5 V

5 V

FSD

D11OUT

Serial Data Out

DR

Serial Data In

DX

DATA-DR

or CMOS Logic Levels

16-Bit Format TTL

Secondary Communication (see Table above)

Serial Data Input

Analog Out

Analog In

OUT –

OUT +

IN –

IN +

FSR

D10OUT

FSX

VCC –

VCC +

20

19

26

25

22

21

1

5

4

3

12

14

11

13

Figure 1–1. Dual-Word (Telephone Interface) Mode

When the DATA-DR/CONTROL input is tied to a logic signal source varying between 0 and 5 V, the

TLC32046 is in the dual-word (telephone interface) mode. This logic signal is routed to the DR line for input

to the DSP only when data frame synchronization (FSD) outputs a low level. The FSD pulse duration is 16

shift clock pulses. Also, in this mode, the control register data bits D10 and D11 appear on D10OUT and

D11OUT, respectively, as outputs.

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