TDA7502 datasheet(6/25 Pages) STMICROELECTRONICS

6 / 25 page

Block diagram and PIN description

TDA7502

6/25

Table 1.

Pin description

Name

Type

Reset

status

Function

VDD1

–

3.3V core supply.

GND1

–

Core ground.

3INT

I/O

–

External interrupt line (Input/Output). When this line is

asserted low, the DSP may be interrupted. Acts as IRQA

line of DSP core.

SCANEN

–

SCAN enable when active with TESTEN also active,

controls theshifting of the internal scan chains.

TESTEN

–

Test enable when active, puts the chip into test mode and

muxes the XTI clock to all flip-flops. When SCANEN is also

active, the scan chain shifting

6DBRQN

–

Debug port request Input. A means of entering the Debug

mode of operation.

DBOUT/GPIO2

I/O

The serial data output for the Debug port. Can also be

used as a GPIO.

VDD2

–

3.3V core supply.

GND2

–

Core ground.

DBCK/GPIO0

I/O

Debug port Bit Clock/Chip status 1. The serial clock for the

Debug Port is provided when an input. When an output,

provides information about the chip status. Can also be

used as GPIO

DBIN/GPIO1

I/O

Debug port Serial Input/Chip status 0. The serial data

input for the Debug Port is provided when an input. When

an output, provides information about the chip status. Can

also be used as GPIO.

CLKOUT

–

Output clock.

PGND

–

PLL clock ground Input. Ground connection for oscillator

circuit.

PVCC

–

PLL clock power supply. Positive supply for PLL clock

oscillator.

XTO (1)

High

Crystal oscillator output. Crystal oscillator output drive.

XTI (1)

I–

Crystal oscillator input. External clock input or crystal

connection.

RESET

I/O

System reset. A logic low level applied to RESET input

initializes DSPs. During debug mode if this pin is pulled

low in while the DBRQN line is pulled low then the DSP

pointed to by the DBSEL pin will be reset.

VDD3

–

3.3V supply.

GND3

–

Ground.

SDI0

–

SDI0 is a stereo digital audio data input pin channel 0.

SDI1

–

SDI1 is a stereo digital audio data input pin channel 1.

SDI2

–

SDI2 is a stereo digital audio data input pin channel 2.

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