Datasheet

ADSP-21469
Rev. 0 | Page 41 of 72 | June 2010
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 37. Serial Ports—TDV (Transmit Data Valid)
Parameter Min Max Unit
Switching Characteristics
1
t
DRDVEN
Data-Valid Enable Delay from Drive Edge of External Clock 3 ns
t
DFDVEN
Data-Valid Disable Delay from Drive Edge of External Clock 8 ns
t
DRDVIN
Data-Valid Enable Delay from Drive Edge of Internal Clock –0.1 ns
t
DFDVIN
Data-Valid Disable Delay from Drive Edge of Internal Clock 2 ns
1
Referenced to drive edge.
Figure 26. Serial Ports—Transmit Data Valid 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