CS6422-CS datasheet(43/48 Pages) CIRRUS

43 / 48 page

CS6422

NI - Network Interface Input, Pin 17

Input to the network side analog-to-digital converter (far-end input/receive input). This input expects a

single-pole RC anti-aliasing filter with a corner frequency of 8 kHz. Maximum signal level before clipping

at this point is 0.9 Vrms (2.5 Vpp), assuming default settings for RGain.

Microcontroller Interface

RST - Active Low Reset Input, Pin 5

When RST is held low, the CS6422 is put into a low power mode with all functional blocks idle. When

RST goes high, the CS6422 is started in a known state.

DRDY - Active Low Microcontroller Interface Data Ready Input, Pin 6

DRDY is a low pulse used to gate valid input data into the Microcontroller Interface.

STROBE - Microcontroller Interface Clock Input, Pin 7

The rising edge of STROBE latches DATA into the Microcontroller Interface while DRDY is low.

DATA - Microcontroller Interface Data Input, Pin 8

DATA is latched into the Microcontroller Interface on the rising edge of STROBE.

Clock

CLKI - Clock Oscillator Input, Pin 14

A 20.480 MHz parallel-resonant crystal should be connected between CLKI and CLKO. Alternatively,

CLKI may be driven directly with an 20.480 MHz CMOS level clock.

CLKO - Clock Oscillator Output, Pin 13

A 20.480 MHz parallel-resonant crystal should be connected between CLKI and CLKO. CLKO must be

left floating if CLKI is driven directly with a CMOS level clock.

Power Supply

AVDD - Analog Supply, Pin 1

+5 Volt analog power supply.

AGND - Analog Ground, Pin 2

Analog ground reference.

DVDD - Digital Supply, Pin 16

+5 Volt digital power supply.

DGND - Digital Ground, Pin 15

Digital ground reference.

CS6422

DS295F1

CS6422-CS Datasheet(PDF) 43 Page - Cirrus Logic