ADSP-21477/ADSP-21478/ADSP-21479
The SPORTx_TDV_O output signal (routing unit) becomes
active in SPORT multichannel/packed mode. During transmit
slots (enabled with active channel selection registers), the
SPORTx_TDV_O is asserted for communication with external
devices.
Table 38. Serial Ports—TDV (Transmit Data Valid)
Parameter
Switching Characteristics1
tDRDVEN
tDFDVEN
tDRDVIN
tDFDVIN
TDV Assertion Delay from Drive Edge of External Clock
TDV Deassertion Delay from Drive Edge of External Clock
TDV Assertion Delay from Drive Edge of Internal Clock
TDV Deassertion Delay from Drive Edge of Internal Clock
1 Referenced to drive edge.
88-Lead LFCSP Package All Other Packages
Min
Max
Min
Max
Unit
3
3
ns
2 × tPCLK
13.25
ns
–0.1
–0.1
ns
3.5
3.5
ns
DRIVE EDGE
DAI_P20–1
(SCLK, EXT)
DRIVE EDGE
TDVx
DAI_P20-1
tDRDVEN
DRIVE EDGE
DAI_P20–1
(SCLK, INT)
tDFDVEN
DRIVE EDGE
TDVx
DAI_P20-1
tDRDVIN
tDFDVIN
Figure 25. Serial Ports—TDV Internal and External Clock
Rev. C | Page 46 of 76 | July 2013