Datasheet

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PCM1804
SLES022C – DECEMBER 2001 – REVISED OCTOBER 2007
Table 1. Oversampling Ratio in Master Mode
OSR2 OSR1 OSR0 OVERSAMPLING RATIO SYSTEM CLOCK RATE
Low Low Low Single rate ( × 128 f
S
) 768 f
S
Low Low High Single rate ( × 128 f
S
) 512 f
S
Low High Low Single rate ( × 128 f
S
) 384 f
S
Low High High Single rate ( × 128 f
S
) 256 f
S
High Low Low Dual rate ( × 64 f
S
) 384 f
S
High Low High Dual rate ( × 64 f
S
) 256 f
S
High High Low Quad rate ( × 32 f
S
) 192 f
S
High High High Quad rate ( × 32 f
S
) 128 f
S
High Low Low DSD mode ( × 64 f
S
) 384 f
S
High Low High DSD mode ( × 64 f
S
) 256 f
S
Table 2. Oversampling Ratio in Slave Mode
OSR2 OSR1 OSR0 OVERSAMPLING RATIO SYSTEM CLOCK RATE
Low Low Low Single rate ( × 128 f
S
) Automatically detected
Low Low High Dual rate ( × 64 f
S
) Automatically detected
Low High Low Quad rate ( × 32 f
S
)
(1)
Automatically detected
Low High High Reserved –
High Low Low Reserved –
High Low High Reserved –
High High Low Reserved –
High High High Reserved –
(1) Only at the 128-f
S
system clock rate
Table 3. Sampling Frequency and System Clock Frequency
SYSTEM CLOCK FREQUENCY (MHz)
SAMPLING
OVERSAMPLING RATIO
FREQUENCY (kHz)
128 f
S
192 f
S
(1)
256 f
S
384 f
S
512 f
S
768 f
S
32 – – 8.192 12.288 16.384 24.576
Single rate
(2)
44.1 – – 11.2896 16.9344 22.5792 33.8688
48 – – 12.288 18.432 24.576 36.864
88.2 – – 22.5792 33.8688 – –
Dual rate
(3)
96 – – 24.576 36.864 – –
176.4 22.5792 33.8688 – – – –
Quad rate
(4)
192 24.576 36.864 – – – –
DSD mode
(3)
44.1 – – 11. 2896 16.9344 – –
(1) Only available in master mode at the quad rate
(2) Modulator is running at 128 f
S
.
(3) Modulator is running at 64 f
S
.
(4) Modulator is running at 32 f
S
.
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