CDB6420 Cirrus Logic Inc, CDB6420 Datasheet - Page 32
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CDB6420
Manufacturer Part Number
CDB6420
Description
Development Kit
Manufacturer
Cirrus Logic Inc
Datasheet
1.CDB6420.pdf
(52 pages)
Specifications of CDB6420
Silicon Manufacturer
Cirrus Logic
Application Sub Type
Speakerphone
Kit Application Type
Audio / Video / TV
Silicon Core Number
CS6420
Kit Contents
Board
Kit Features
Analog And Digital Patch Area
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
NI - Network Interface Input, Pin 17
Microcontroller Interface
RST - Active Low Reset Input, Pin 5
DRDY - Active Low Microcontroller Interface Data Ready Input, Pin 6
STROBE - Microcontroller Interface Clock Input, Pin 7
DATA - Microcontroller Interface Data Input, Pin 8
Clock
CLKI - Clock Oscillator Input, Pin 14
CLKO - Clock Oscillator Output, Pin 13
Power Supply
AVDD - Analog Supply, Pin 1
AGND - Analog Ground, Pin 2
DVDD - Digital Supply, Pin 16
DGND - Digital Ground, Pin 15
32
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 1 V
Analog Gain.
When RST is held low, the CS6420 is put into a low power mode with all functional blocks
idle. When RST goes high, the CS6420 is started in a known state.
DRDY is a low pulse used to gate valid input data into the Microcontroller Interface.
The rising edge of STROBE latches DATA into the Microcontroller Interface while DRDY is
low.
DATA is latched into the Microcontroller Interface on the rising edge of STROBE.
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.
A 20.480 MHz parallel-resonant crystal should be connected between CLKI and CLKO. Must
be floating if CLKI is driven directly with a CMOS level clock.
+5 Volt analog power supply.
Analog ground reference.
+5 Volt digital power supply.
Digital ground reference.
rms
(2.8 V
pp
), assuming default settings for the Rx
CS6420
DS205PP2