Digital Audio Transmitter Timing
15
Digital Audio Transmitter Timing
Table 23. Digital Audio Transmitter Timing
181 MHz
Unit
No.
Characteristic
Expression
Min
—
Max
99
ACI frequency (see note)
ACI period
1 / (2 x TC)
2 × TC
90
—
MHz
ns
100
101
102
103
11.1
2.8
2.8
—
ACI high duration
0.5 × TC
0.5 × TC
1.5 × TC
—
ns
ACI low duration
—
ns
ACI rising edge to ADO valid
8.3
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
16
Timer Timing
Table 24. Timer Timing
181 MHz
No.
Characteristics
Expression
Unit
Min
13
Max
—
104
105
TIO Low
TIO High
2 × TC + 2.0
2 × TC + 2.0
ns
ns
13
—
Note:
1. VCORE_VDD = 1.25 V 0.05 V; TJ = –40°C to 115°C for 150 MHz; TJ = 0°C to 100°C for 181 MHz; CL = 50 pF
TIO
104
105
Figure 19. TIO Timer Event Input Restrictions
Freescale Semiconductor
DSP56371 Technical Data
51
FREESCALE [ Freescale ]
