CS7410

DS553PP1

33

4.6

Digital Audio Output Interface

nects to an audio PCM DAC. The sample rate and the size of the samples are programmable to accommo-

date any commercially available DAC. The CS7410 has two data output pins, for up to 4 channels of PCM

output, and a separate output pin to simultaneously output IEC-958 encoded data (either compressed or

uncompressed).

4.7

∆Σ Modulator Interface

The

tor, which outputs two differential digital signals on four pins. These outputs are design to drive an external

op-amp based integrator circuit (contact Cirrus Logic Applications Engineering for details).

Pin

Signal Name

Type

Description

78

PCM_XCK

B

Audio 256x/384x/512x Clock input or output to Serial DAC.

When output, it’s generated from CS7410 internal PLL.

77

SERVOCK

I

Optional source of Audio 256x/384x/512x Audio Clock. May

be used for CD direct audio to match input and output

clocks.

79

PCM_MUTE

O

Audio Mute control to external DAC. Polarity is programma-

ble and is three-stated at power up.

92

PCM_BCK

O

Audio Bit Clock output to serial DAC. Polarity is programma-

ble.

93

PCM_LRCK

O

Audio Out Left/Right Clock to serial DAC.

94

PCM_DO_0

O

Audio Serial PCM Data Out[0].

95

PCM_DO_1

O

Audio Serial PCM Data Out[1].

96

IEC958_O

O

IEC-958 Output

Table 13. Audio Output Interface

Pin

Signal Name

Type

Description

84

DAC_LP

O

∆Σ left channel, positive output

85

DAC_LN

O

∆Σ left channel, negative output

87

DAC_RP

O

∆Σ right channel, positive output

89

DAC_RN

O

∆Σ right channel, positive output

Table 14.

∆Σ Output Interface