ADAU1445 Analog Devices, ADAU1445 Datasheet - Page 17

• Manufacturer Part Number: ADAU1445
• Manufacturer: Analog Devices

Specifications of ADAU1445

• Instructions/cycles: 3584
• Digital I/o Channels: 24/24
• Analog I/o Channels: 0/0
• Product Description: Digital audio processor with flexible audio routing matrix, 8 × 2-channel ASRC

THEORY OF OPERATION
SYSTEM BLOCK DIAGRAM
FRAME CLOCK
*SPI/I
†
THERE ARE 12 BIT CLOCKS (BCLK[11:0]) AND 12 FRAME CLOCKS (LRCLK[11:0]) IN TOTAL. OF THE 12 CLOCKS,
SIX ARE ASSIGNABLE, THREE MUST BE OUTPUTS, AND THREE MUST BE INPUTS.
BIT CLOCK
DIGITAL AUDIO
SDATA_IN[8:0]
2
(24-CHANNEL
(LRCLK)
C = THE ADDR0, CLATCH, SCL/CCLK, SDA/COUT, AND ADDR1/CDATA PINS.
(BCLK)
INPUT)
SPDIFI
†
†
3 TO 9
3 TO 9
9
ADAU1442/
ADAU1445/
ADAU1446
SERIAL DATA
INPUT PORT
RECEIVER
1.8V REGULATOR
S/PDIF
(×9)
9
+3.3V VDRIVE
DVDD
6
DGND
RESET
RESET
8
SPI/I
I
AND SELF-BOOT
2
AVDD
C/SPI CONTROL
2
Figure 8. System Block Diagram
INTERFACE
5
C* SELFBOOT
PROGRAMMABLE AUDIO
UP TO 16 CHANNELS OF
170ms DELAY MEMORY
Rev. C | Page 17 of 92
PROCESSOR CORE,
28-/56-BIT, 172MHz
ASYNCHRONOUS
SERIAL CLOCK
SAMPLE RATE
CONVERTERS
DOMAINS
AGND
(×12)
MP[11:4]
MP
8
ADC[3:0]
4
MP[3:0]/
AUXILIARY
IOVDD
ADC
4
8
4
ADAU1442/ADAU1445/ADAU1446
PLL[2:0] PLL_FILT
PVDD
3
PLL
PGND
TRANSMITTER
OUTPUT PORT
SERIAL DATA
S/PDIF
OSCILLATOR
XTALI, XTALO
(×9)
OUTPUT
CLOCK
CLOCK
9
2
3 TO 9
3 TO 9
2
9
CLKMODE[1:0]
CLKOUT
SPDIFO
SDATA_OUT[8:0]
(24-CHANNEL
DIGITAL AUDIO
OUTPUT)
BIT CLOCK
(BCLK)
FRAME CLOCK
(LRCLK)
†
†