Datasheet

AD1937
Rev. B | Page 25 of 36
Table 19. Pin Function Changes in TDM and TDM/AUX Modes (Replication of Table 18)
Mnemonic Stereo Modes TDM Modes TDM/AUX Modes
ASDATA1 ADC1 data out TDM ADC data out TDM data out
ASDATA2 ADC2 data out TDM ADC data in AUX DAC1 data out (to external DAC1)
DSDATA1 DAC1 data in TDM DAC data in
TDM data in
DSDATA2 DAC2 data in TDM DAC data out
AUX ADC1 data in (from external ADC1)
DSDATA3 DAC3 data in TDM DAC2 data in (dual-line mode)
AUX ADC2 data in (from external ADC2)
DSDATA4 DAC4 data in TDM DAC2 data out (dual-line mode)
AUX DAC2 data out (to external DAC2)
ALRCLK ADC LRCLK in/out TDM ADC frame sync in/out
TDM frame sync in/out
ABCLK ADC BCLK in/out TDM ADC BCLK in/out
TDM BCLK in/out
DLRCLK DAC LRCLK in/out TDM DAC frame sync in/out
AUX LRCLK in/out
DBCLK DAC BCLK in/out TDM DAC BCLK in/out AUX BCLK in/out
AUX
ADC 1
LRCLK
BCLK
DATA
MCLK
AUX
ADC 2
LRCLK
BCLK
DATA
MCLK
AUX
DAC 1
AUX
DAC 2
LRCLK
BCLK
DATA
MCLK
LRCLK
BCLK
DATA
30MHz
12.288MHz
SHARC IS RUNNING IN SLAVE MODE
(INTERRUPT-DRIVEN)
SHARC
AD1937
TDM MASTER
AUX MASTER
FSYNC-TDM (RFS) TFS (NC) RxDATA TxDATA RxCLK TxCLK
MCLK
ASDATA2
DSDATA4
DBCLK
DLRCLK
DSDATA2
DSDATA3
MCLKI/MCLKXI
ASDATA1 ALRCLK ABCLK DSDATA1
07414-027
Figure 27. Example of TDM/AUX Mode Connection to SHARC® (AD1937 as TDM Master/AUX Master Shown)