TC1920 datasheet(40/78 Pages) INFINEON

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TC1920

Data Sheet

V 1.3, 2003-10

Preliminary

Codec Interface

The speech A/D and D/A converters (called codec) is designed for telephone and

speech recognition quality. They can be used for microphone / earpiece applications.

The TC1920 configuration implements a dual channel speech codec connected to the

FPI bus.

Figure 14

General Codec Overview

General Purpose I/Os (GPIO)

• Push/pull output drivers

• 3.3 Volt operation for GPIO

• Programmable pull-up/-down devices at all pins

• Optional Open Drain Output Mode

Clo c k

Co n tro l

Add res s

De co d e r

In te rru p t

Co n tro l

SR 1

SR 2

pe r

SR 3

SR 0

CO D E C

M o dule

Kern e l

CO D 0

clock disab le

exte rnal clock in p u t

AI0 +

AI0 -

AO0 +

AO0 -

CO DE C _ DIS

C EXT

SR 4

SR 5

CO D0

CO D 1

RE F

CO D

GN D

CO D

c h 0 no n-in v . in p u t

c h 0 in v. in p u t

c h 0 no n-in v . o u tpu t

ch0 in v. ou tp ut

AI1 +

AI1 -

AO1 +

AO1 -

c h 1 no n-in v . in p u t

c h 1 in v. in p u t

c h 1 no n-in v . o u tpu t

ch1 in v. ou tp ut

MU T E 0

MU T E 1

m u te ch ann el 0

m u te ch ann el 1

IIS

sig na ls

C o de c by p a s s

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