
DSD1792
SLES067B MARCH 2003 REVISED NOVEMBER 2006
www.ti.com
35
MSB
LSB
16
BCK
DATA
1/4 fS or 1/8 fS
DATA
WDCK
Audio Data Word = 16-Bit
Audio Data Word = 20-Bit
Audio Data Word = 24-Bit
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
16
15
MSB
LSB
16
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
20
19
20
17 18 19
MSB
LSB
16
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
24
23
20
17 18 19
24
21 22 23
Figure 38. Audio Data Input Format for External Digital Filter (Internal DF Bypass Mode) Application
DATA
t(BCH)
50% of VDD
BCK
WDCK
(LRCK)
t(BCL)
t(LB)
t(BCY)
t(DS)
t(DH)
50% of VDD
t(BL)
PARAMETER
MIN
MAX
UNITS
t(BCY) BCK pulse cycle time
20
ns
t(BCL) BCK pulse duration, LOW
7
ns
t(BCH) BCK pulse duration, HIGH
7
ns
t(BL)
BCK rising edge to WDCK falling edge
5
ns
t(LB)
WDCK falling edge to BCK rising edge
5
ns
t(DS)
DATA setup time
5
ns
t(DH)
DATA hold time
5
ns
Figure 39. Audio Interface Timing for External Digital Filter (Internal DF Bypass Mode) Application