Datasheet

Rev. B | Page 40 of 68 | March 2013
ADSP-21483/ADSP-21486/ADSP-21487/ADSP-21488/ADSP-21489
The SPORTx_TDV_O output signal (routing unit) becomes
active in SPORT multichannel 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 Min Max Unit
Switching Characteristics
1
t
DRDVEN
TDV Assertion Delay from Drive Edge of External Clock 3 ns
t
DFDVEN
TDV Deassertion Delay from Drive Edge of External Clock 8 ns
t
DRDVIN
TDV Assertion Delay from Drive Edge of Internal Clock –1 ns
t
DFDVIN
TDV Deassertion Delay from Drive Edge of Internal Clock 2 ns
1
Referenced to drive edge.
Figure 24. Serial Ports—TDM Internal and External Clock
DRIVE EDGE DRIVE EDGE
DAI_P20–1
(SCLK, EXT)
t
DRDVEN
t
DFDVEN
DRIVE EDGE DRIVE EDGE
DAI_P20–1
(SCLK, INT)
t
DRDVIN
t
DFDVIN
TDVx
DAI_P20-1
TDVx
DAI_P20-1