Datasheet

AD1939 Data Sheet
Rev. E | Page 16 of 32
Combining the AUX ADC and DAC modes results in a system
configuration of 8 ADCs and 12 DACs. The system, then, con-
sists of two external stereo ADCs, two external stereo DACs,
and one AD1939. This mode is shown in Figure 17 (combined
AUX DAC and ADC modes).
Table 12. Pin Function Changes in TDM and AUX Modes
Pin 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/ADC 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
LEFT RIGHT
MSB MSB
MSB MSB
ALRCLK
ABCLK
DSDATA1
(TDM_IN)
DLRCLK
(AUX PORT)
DBCLK
(AUX PORT)
ASDATA2
(
AUX1_OUT)
DSDATA4
(
AUX2_OUT)
MSB
EMPTY EMPTY EMPTY EMPTY DAC L1 DAC R1 DAC L2 DAC R2 DAC L3 DAC R3 DAC L4 DAC R4 AUX L1 AUX R1 AUX L2 AUX R2
8 ON-CHIP DAC CHANNELS
AUXILIARY DAC CHANNELS
APPEAR AT
AUX DAC PORTSUNUSED SLOTS
32 BITS
0
6071-051
Figure 14. 16-Channel DAC TDM-AUX Mode