Datasheet

Data Sheet AD1938
Rev. E | Page 23 of 32
Table 13. Pin Function Changes in TDM and AUX Modes (Replication of Table 12)
Mnemonic Stereo Modes TDM Modes AUX Modes
ASDATA1 ADC1 Data Out ADC TDM Data Out TDM Data Out
ASDATA2 ADC2 Data Out ADC TDM Data In AUX Data Out 1 (to Ext. DAC 1)
DSDATA1 DAC1 Data In DAC TDM Data In TDM Data In
DSDATA2 DAC2 Data In DAC TDM Data Out AUX Data In 1 (from Ext. ADC 1)
DSDATA3 DAC3 Data In DAC TDM Data In 2 (Dual-Line Mode) AUX Data In 2 (from Ext. ADC 2)
DSDATA4 DAC4 Data In DAC TDM Data Out 2 (Dual-Line Mode) AUX Data Out 2 (to Ext. DAC 2)
ALRCLK ADC LRCLK In/ADC LRCLK Out ADC TDM Frame Sync In/DC TDM Frame Sync Out TDM Frame Sync In/TDM Frame Sync Out
ABCLK ADC BCLK In/ADC BCLK Out ADC TDM BCLK In/ADC TDM BCLK Out TDM BCLK In/TDM BCLK Out
DLRCLK DAC LRCLK In/DAC LRCLK Out DAC TDM Frame Sync In/DAC TDM Frame Sync Out AUX LRCLK In/AUX LRCLK Out
DBCLK DAC BCLK In/DAC BCLK Out DAC TDM BCLK In/DAC TDM BCLK Out AUX BCLK In/AUX BCLK Out
05582-026
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
MCLK
30MHz
12.288MHz
SHARC IS RUNNING IN SLAVE MODE
(INTERRUPT-DRIVEN)
SHARC
®
AD1938
TDM MASTER
AUX MASTER
FSYNC-TDM (RFS) RxCLK RxDATA TxCLK TxDATA TFS (NC)
ASDATA2
DSDATA4
DBCLK
DLRCLK
DSDATA2
DSDATA3
MCLKI/XI
ASDATA1
ALRCLK ABCLK DSDATA1
Figure 26. Example of AUX Mode Connection to SHARC (AD1938 as TDM Master/AUX Master Shown)