Audio Codec '97 Revision 2.1
Audio Codec '97 Revision 2.1
Audio Codec '97 Revision 2.1
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AC ‘97 Component Specification <strong>Revision</strong> <strong>2.1</strong><br />
9.2.3 Data Setup And Hold<br />
AC ’97 <strong>2.1</strong> Appendix D updates DC and AC characteristics. Chapter 9 should NOT be used for new designs.<br />
(50pF external load)<br />
BIT_CLK<br />
SYNC,<br />
SDATA_OUT<br />
T setup<br />
T hold<br />
Figure 22. Data setup and hold timing diagram<br />
Parameter Symbol Min Typ Max Units<br />
Setup to falling edge of BIT_CLK Tsetup 15.0 - - ns<br />
Hold from falling edge of BIT_CLK Thold 5.0 - - ns<br />
Table 26. Data setup and hold timing parameters<br />
Note 1: Setup and hold time parameters for SDATA_IN are with respect to the AC ‘97 Controller.<br />
9.2.4 Signal Rise and Fall Times<br />
AC ’97 <strong>2.1</strong> Appendix D updates DC and AC characteristics. Chapter 9 should NOT be used for new designs.<br />
(50pF external load; from 10% to 90% of Vdd)<br />
BIT_CLK<br />
SYNC<br />
SDATA_IN<br />
SDATA_OUT<br />
Trise clk<br />
Trise sync<br />
Trise din<br />
Trise dout<br />
53<br />
Tfall clk<br />
Tfall sync<br />
Tfall din<br />
Tfall dout<br />
Figure 23. Signal rise and fall times diagram<br />
Parameter Symbol Min Typ Max Units<br />
BIT_CLK rise time Triseclk 2 - 6 ns<br />
BIT_CLK fall time Tfallclk 2 - 6 ns<br />
SYNC rise time Trisesync 2 - 6 ns<br />
SYNC fall time Tfallsync 2 - 6 ns<br />
SDATA_IN rise time Trisedin 2 - 6 ns<br />
SDATA_IN fall time Tfalldin 2 - 6 ns<br />
SDATA_OUT rise time Trisedout 2 - 6 ns<br />
SDATA_OUT fall time Tfalldout 2 - 6 ns<br />
Table 27. Signal rise and fall times parameters<br />
May 22, 1998
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