Datasheet

ADSP-21477/ADSP-21478/ADSP-21479
Rev. C | Page 45 of 76 | July 2013
Table 37. Serial Ports—Enable and Three-State
88-Lead LFCSP Package All Other Packages
Unit
Parameter Min Max Min Max
Switching Characteristics
t
DDTEN
1
Data Enable from External Transmit SCLK 2 2 ns
t
DDTTE
1
Data Disable from External Transmit SCLK 23 20 ns
t
DDTIN
1
Data Enable from Internal Transmit SCLK –1 –1 ns
1
Referenced to drive edge.
Figure 24. Enable and Three-State
DRIVE EDGE
DRIVE EDGE
DRIVE EDGE
t
DDTIN
t
DDTEN
t
DDTTE
DAI_P20–1
(SCLK, INT)
DAI_P20–1
(DATA
CHANNEL A/B)
DAI_P20–1
(SCLK, EXT)
DAI_P20–1
(DATA
CHANNEL A/B)