AN1836-AN21161 Analog Devices, AN1836-AN21161 Datasheet - Page 12
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AN1836-AN21161
Manufacturer Part Number
AN1836-AN21161
Description
Interfacing the ADSP-21161 SIMD SHARC DSP to the AD1836 (24-bit/96 kHz) Multichannel Codec
Manufacturer
Analog Devices
Datasheet
1.AN1836-AN21161.pdf
(70 pages)
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2. AD1836/ADSP21161 EXT-TDM Digital Serial Interface Protocol
The Extended TDM Mode protocol described in the AD1836 data sheet provides for a 8x32bit timeslots-bit time slot.
The Extended TDM protocol for the 21161 EZ-KIT Lite makes use of 1 auxiliary input device - the CS8414 SP/DIF receiver,
and 1 auxiliary output device - the AD1852 DAC. See fig x for a functional block diagram of the EZ-KIT Lite audio interface.
ABCLK
(RCLK0 & TCLK2)
ABCLK
(RCLK0 & TCLK2)
Timeslot #
FSTDM
(FS0)
ASDATA1
(D0A)
DSDATA1 (D2A)
Outgoing
Timeslot #
FSTDM
(FS0)
ASDATA1
(D0A)
DSDATA1 (D2A)
Outgoing
Figure 10. Modified AD1836 Extended TDM Bi-directional Audio Frame For The 21161 EZ-KIT Lite
FS2 (TVD2) unconnected in multichannel mode
For the 21161, the serial clocks are internally connected in multichannel mode.
X = Indicates inactive timeslot, no external auxiliary device connected
= Gray area indicates conversion resources internal to the AD1836
= Gray area indicates conversion resources internal to the AD1836
Figure 9. AD1836 Extended TDM Mode Bi-directional Audio Frame
BCLK not to scale- 256 BCLKs per
32-
Internal
DAC Left 0
BCLK not to scale- 256 BCLKs per
32-
Internal
DAC Left 0
Internal
ADC Left 0
Internal
ADC Left 0
0
0
Internal
ADC Left 1
Internal
DAC Left 1
Internal
ADC Left 1
Internal
DAC Left 1
1
1
Auxiliary
ADC Left
CS8414
SP/DIF Left
Internal
DAC Left
Internal
DAC Left
2
2
AD1852
DAC Left
Auxiliary
ADC Left
Auxiliary
DAC Left
3
X
3
Internal
DAC Right0
Internal
DAC Right0
Intern ADC
Right 0
Intern ADC
Right 0
4
4
Internal
DAC Right1
Internal
DAC Right1
Intern ADC
Right 1
Intern ADC
Right 1
5
5
CS8414
SP/DIF R0
Internal
DAC Right2
Auxiliary
ADC R0
Internal
DAC Right2
6
6
Auxiliary
ADC R1
AD1852
DAC R0
Auxiliary
DAC R0
7
7
X
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