UPD63210GT View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD63210GT

16-BIT D/A CONVERTER WITH BUILT-IN DIGITAL FILTER FOR AUDIO

NEC => Renesas Technology 

µPD63210, 63210L

3.4 Digital De-emphasis Function

The IIR digital filter performs de-emphasis operations. The filter can cope with three types of sampling

frequencies (32/44.1/48 KHz) by using the DEFS1 (No.10) and DEFS2 (No.11) pins.

Table 3-4. Selection of De-emphasis Filter

De-emphasis

OFF

32 kHz

44.1 kHz

48 kHz

DEFS1

L

H

L

H

DEFS2

L

H

H

L

3.5 Soft Mute Function

The soft mute function can be realized by control of the SMUTE (No.13) pin.

When applying the mute, set the value to SMUTE = H. By this, the output level of the D/A converter is

attenuated from 0dB to negative infinity (-∞) in 128 steps. The time required for a complete mute is 1024/fs.

When cancelling the mute, set the value to SMUTE = L. By this, the output level of the D/A converter is

increased from negative infinity (-∞) to 0dB in 128 steps. Figure 3-8 shows the relationship between the control

of the SMUTE pin and the output level of the D/A converter.

When initializing by resetting the system, the mute is cancelled and the output level of the D/A converter

reaches the maximum (0dB).

Don’t input the narrower “H” pulse than 8/fs to pin 13, or analog output signal may become unstable. In this

case, the unstable condition may be kept until system reset or power off.

Figure 3-8. Operation of Soft Mute Function

H

SMUTE

L

0 dB

D/A converter

output level

-∞

1024/fs

11

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