Datasheet

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Zero-Cross Detection
Power Up/Down for Each Module
Digital Interface
Power Supply
PCM1870
SLAS544A – MAY 2007 – REVISED SEPTEMBER 2007
Zero-cross detection minimizes audible zipper noise while changing analog volume and digital attenuation. This
function can be applied to digital input or digital output by register 86 (ZCRS).
Using register 73 (PBIS), register 82 (PAIR, PAIL, PADS, PMCB, PADR, PADL), and register 90 (PCOM),
unused modules can be powered down to minimize power consumption (13 mW when recording only).
All digital I/O pins can interface at various power supply voltages. The V
IO
pin can be connected to a 1.71-V to
3.6-V power supply.
The V
CC
pin can be connected to 2.4 V to 3.6 V. The V
DD
pin and V
IO
pin can be connected to 1.71 to 3.6 V. A
different voltage can be applied to each of these pins (for example, V
DD
= 1.8 V, V
IO
= 3.3 V).
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Product Folder Link(s): PCM1870