UPD63335 Ver la hoja de datos (PDF) - NEC => Renesas Technology

Número de pieza

componentes Descripción

Fabricante

UPD63335

STEREO SOUND CODEC

NEC => Renesas Technology 

µ PD63335

1.4 Reset

The µPD63335 features three reset modes.

(1) Cold reset

_______

Cold reset is controlled by input signals via the RESET pin, and is used to initialize the µPD63335. Registers

are reset to their initial values.

(2) Warm reset

A warm reset is used to reset the digital command interface for any reason. When FFh is written to the warm

reset register (7Fh), the µPD63335 performs a warm reset. Register values are retained during a warm reset.

(3) Register reset

This initializes the µPD63335’s internal registers. All registers are reset, except for the following registers.

• Reset/clock status register (00h)

• Interface/timing register (01h)

• Power down control register (18h)

1.5 Pin to Connect Noise-Reducing Capacitor

Pin 27 is a reference voltage pin that is used to connect to a bypass capacitor for stabilizing the internal reference

voltage. Connect the bypass capacitor as shown in the figure below.

Figure 1-2. Example of Bypass Capacitor Connection

µPD63335

Tantalum

capacitor

4.7 µ F

Vref

+

0.1 µ F

Ceramic capacitor

Pins 29 and 30 are used to connect capacitors for the ADC’s anti alias filter. Connect the capacitor as shown in

the figure below.

Figure 1-3. Example of Capacitor Connection for Anti Alias Filter

270 pF

270 pF

µPD63335

AFILT1

AFILT2

10

Data Sheet S15003EJ6V0DS

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