TDA7503 データシートの表示（PDF） - STMicroelectronics

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TDA7503

DUAL DSP PLUS MICRO FOR AUDIO APPLICATIONS

STMicroelectronics 

TDA7503

PIN DESCRIPTION (continued)

N.

Name

Type

Reset

Status

O/P

Load

Buffer

Function

94

SCLK

I/O

I

200pF 8mA Microcontroller General Purpose. Each of the six GPIO

lines can be individually configured to be digital input or

output by writing to the P1 and P1DIR registers. All

GPIOs are configured to be inputs with the outputs tri-

stated except for P1.0. This pin is tri-stated while the

RESET pin is held low and is pulled low when RESET is

released. This pin will be pulled high when in IDLE or

PWRDN modes.

95

MOSI

I/O

I

200pF 8mA Microcontroller SPI Master Output Slave Input Serial

Data . Serial Data Output for SPI type serial port when in

SPI Master Mode and Serial Data Input when in SPI

Slave Mode.

96

MISO

I/O

I

200pF 8mA Microcontroller SPI Master Input Slave Output Serial

Data . Serial Data Input for SPI style serial port when in

SPI Master Mode and Serial Data Output when in SPI

Slave Mode.

97

RESET

I/O

I

100pF 4mA System Reset. A logic low level applied to RESET input

initializes the microcontroller. The micro is responsible for

initializing the DSPs. If the watchdog timer overflow

occurs this pin is driven low for 1 watchdog timer cycle.

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.

98

VSS3

GND

–

Power Ground.

99

VDD1

I

–

VDD 3.3V Power Supply.

100

T1(P3.5)

I/O

I

100pF 4mA Microcontroller Timer 1 External Input. Input event clock

for timer 1, or GPIO. This pin can also act as GPIO using

the P3 and P3DIR registers.

Note : All data Pads are Schmitt Trigger Pads. This excludes the 18 power pads and the 2 crystal oscillator pads - pins XTI and XTO.

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