N.

Name

Type

Description

36

GPIO1

I/O

General Purpose I/O

37

GPIO0

I/O

General Purpose I/O

38

GPIO5

I/O

General Purpose I/O

39

DBCK

I/O

Debug port Bit Clock/Chip Status 1. The serial clock for the Debug Port is

provided. May also be used as GPIO9.

40

DBIN

I/O

Debug port Serial Input/Chip Status 0. The serial data input for the Debug Port is

provided. May also be used as GPIO11.

41

DBOUT

I/O

Debug Port Serial Output. This pin is the serial Data output for the Debug port.

May also be used as GPIO10.

42

DBRQN

I

Debug Port Request Input. This pin is used to request Debug Mode operation to

Euterpe

43

NRESET

I

System Reset. A low level applied to RESET input initializes the IC.

44

INTN

I

External interrupt line. When this line is asserted low the DSP may be interrupted.

45

SCL/SCK

I/O

I

I/O

SPI Bit Clock. If SPI interface is enabled, it behaves as SPI bit clock.

46

SDA/SS

I/O

I

I

SPI Slave Select. If SPI interface is enabled, it behaves as Slave select line for

SPI bus.

47

VDD

I

Digital Power Supply

48

GND

I

Ground

49

GPIO2

I/O

General Purpose I/O

50

GPIO6

I/O

General Purpose I/O

51

GPIO3

I/O

General Purpose I/O

52

CGND

I

Ground for the internal CODEC cell

53

CVDD

I

Power Supply for the internal CODEC cell

54

VOUTR

O

Single-ended right channel analogue output from DAC

55

VOUTL

O

Single-ended left channel analogue output from DAC

56

VDD

I

Digital power supply

57

GND

I

Ground

58

VINR

I

Single-ended right channel analogue input to ADC

59

VINL

I

Single-ended left channel analogue input to ADC

60

CGNDA

I

Ground for the internal CODEC cell

61

TEST4

O

Connect a 22K pull-down resistor

62

CVDDA

I

Power Supply for the internal CODEC cell

63

VREF

O

Voltage Reference from the CODEC cell

64

REFCAP

O

Voltage Reference Capacitor Bypass

65

GPIO7

I/O

General Purpose I/O

66

GPIO4

I/O

General Purpose I/O

67

VDD

I

Digital power supply

68

CLKOUT

O

Clock Output. Output Clock divided down from PLL

PIN FUNCTIONS (continued)

TDA7550R - TDA7550 - TDA7551 - TDA7552 - TDA7553

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