ADAU1445 Analog Devices, ADAU1445 Datasheet - Page 55

• 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

ASRC Output Rate Select Pairs[7:0] Registers (Address 0xE088 to Address 0xE08F)
Table 34. Bit Descriptions of ASRC Output Rate Select Pairs[7:0] Registers
Bit Position
[15:6]
[5:0]
ASRC Output Rate Bits (Bits[5:0])
These bits select the output conversion rate for the eight ASRCs.
Any asynchronous input to the ASRC is output at this rate. It
can be set by one of the 12 serial output channel pairs’ f
signals (the LRCLK associated with their automatically assigned
serial port) or by the core’s f
In the case of the ADAU1442, each output from the stereo
ASRCs can have a separate data output.
In the case of the ADAU1445, each output from the stereo
ASRCs can have a separate data output; however, all outputs
from Stereo ASRC[3:0] must be synchronous to each other, and
Description
Reserved
ASRC output rate
000000 = Serial Output Pair 0 (Channel 0, Channel 1)
000001 = Serial Output Pair 1 (Channel 2, Channel 3)
000010 = Serial Output Pair 2 (Channel 4, Channel 5)
000011 = Serial Output Pair 3 (Channel 6, Channel 7)
000100 = Serial Output Pair 4 (Channel 8, Channel 9)
000101 = Serial Output Pair 5 (Channel 10, Channel 11)
000110 = Serial Output Pair 6 (Channel 12, Channel 13)
000111 = Serial Output Pair 7 (Channel 14, Channel 15)
001000 = Serial Output Pair 8 (Channel 16, Channel 17)
001001 = Serial Output Pair 9 (Channel 18, Channel 19)
001010 = Serial Output Pair 10 (Channel 20, Channel 21)
001011 = Serial Output Pair 11 (Channel 22, Channel 23)
010000 = DSP rate
010001 = internal f
010010 = internal f
010011 = internal f
111111 = no rate
S,NORMAL
, f
S,DUAL
, or f
S,NORMAL
S,DUAL
S,QUAD
S,QUAD
rate
rate
clock signals.
rate
S
clock
Rev. C | Page 55 of 92
all outputs from Stereo ASRC[7:4] must be synchronous to each
other. The first group of ASRCs (Stereo ASRC[3:0]) takes its
output rate from the setting on the Stereo ASRC 0 output. The
output rate for Stereo ASRC[3:1] is automatically set to this rate,
ignoring the settings for the Stereo ASCR[3:1] outputs. The second
group of ASRCs (Stereo ASRC[7:4]) takes its output rate from the
setting on the Stereo ASRC 4 output. The output rate for Stereo
ASRC[7:5] is automatically set to this rate, ignoring the settings
for the Stereo ASRC[7:5] outputs.
In the case of the ADAU1446, which contains no ASRCs, these
registers do not affect system operation in any way and can be
ignored.
ADAU1442/ADAU1445/ADAU1446
Default
111111