Digital Audio Transmitter Timing
HCKR
SCKR (output)
96
98
Note: Figure 17 is drawn assuming positive polarity high frequency clock (RHCKP=0) and positive bit clock polarity
(RCKP=0).
Figure 17. ESAI HCKR Timing
15
Digital Audio Transmitter Timing
Table 23. Digital Audio Transmitter Timing
181 MHz
No.
Characteristic
Expression
Min
Max
Unit
99
100
101
102
103
ACI frequency (see note)
ACI period
ACI high duration
ACI low duration
ACI rising edge to ADO valid
1 / (2 x T C )
2 × T C
0.5 × T C
0.5 × T C
1.5 × T C
11.1
2.8
2.8
90
8.3
MHz
ns
ns
ns
ns
Note:
1. In order to assure proper operation of the DAX, the ACI frequency should be less than 1/2 of theDSP56371
internal clock frequency. For example, if the DSP56371 is running at 181 MHz internally, the ACI frequency
should be less than 90MHz.
ACI
100
101
102
103
ADO
Figure 18. Digital Audio Transmitter Timing
DSP56371 Data Sheet, Rev. 4.1
Freescale Semiconductor
53
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