UPD63210GT NEC, UPD63210GT Datasheet - Page 11

• Manufacturer Part Number: UPD63210GT
• Description: 16-BIT D/A CONVERTER WITH BUILT-IN DIGITAL FILTER FOR AUDIO
• Manufacturer: NEC

3.4 Digital De-emphasis Function
frequencies (32/44.1/48 KHz) by using the DEFS1 (No.10) and DEFS2 (No.11) pins.
3.5 Soft Mute Function
attenuated from 0dB to negative infinity (- ) in 128 steps. The time required for a complete mute is 1024/fs.
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.
reaches the maximum (0dB).
case, the unstable condition may be kept until system reset or power off.
The IIR digital filter performs de-emphasis operations. The filter can cope with three types of sampling
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
When cancelling the mute, set the value to SMUTE = L. By this, the output level of the D/A converter is
When initializing by resetting the system, the mute is cancelled and the output level of the D/A converter
Don’t input the narrower “H” pulse than 8/fs to pin 13, or analog output signal may become unstable. In this
SMUTE
D/A converter
output level
0 dB
-
Figure 3-8. Operation of Soft Mute Function
H
L
Table 3-4. Selection of De-emphasis Filter
De-emphasis
44.1 kHz
32 kHz
48 kHz
OFF
1024/fs
DEFS1
H
H
L
L
DEFS2
H
H
L
L
PD63210, 63210L
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