AN1836-AN21161 Analog Devices, AN1836-AN21161 Datasheet - Page 17

• 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

NOTE: The ADSP-21161 SPORT channel B pins are not functional for multichannel mode. Both the transmitter and
receiver have their own serial clocks. The FS2/FS3 frame syncs become output transmit data valid pins, while FS0/FS1 pins
are used to control the start of a multichannel frame.
NOTE: The ADSP-21161’s FS2 line is an output pin in multichannel mode(TDV2 - Transmit Data Valid). It should be left
unconnected and not tied with FS0 together to the AD1836 Frame Sync. This could cause contention on the FS0 (FSTDM) and
will most likely lock up the SPORT and possibly damage the FS0 pin!!!
Figure 18. Typical AD1836/ADSP-21161 SHARC Serial Port Interconnections (assuming 3.3V I/0
ADSP-21161
Internal DM
SPORT DMA
Transfers
TX2A
RX0A
Table 1. ADSP-21161 SPORT0/2 TDM Configuration
Function
Function
Transmit data
Transmit clock
Transmit frame sync/
word select
Receive data
Receive clock
Receive frame sync
D2A
SCLK0
D0A
SCLK2
FS0
Supply Voltage on the AD1836)
SPORT0
A Chn
A Chn
SPORT0
D0A
SCLK0
FS0
B Chn
B Chn
X
X
X (redefined as TVD2)
SPORT2
A Chn
A Chn
SPORT1
D2A
DSDATA1
ASDATA1
ALRCLK
SCLK1
ABCLK
B Chn
B Chn
X
X
AD1836