Texas Instruments TPA3200D1 - Manual (Page 14)

www.ti.com
AUDIO DATA FORMATS AND TIMING
DATA
t
(BCH)
1.4 V
BCK
LRCK
t
(BCL)
t
(LB)
t
(BCY)
t
(DS)
t
(DH)
1.4 V
1.4 V
t
(BL)
TPA3200D1
SLOS442A – MAY 2005 – REVISED JULY 2005
The TPA3200D1 supports I 2 S and 16-bit-word right-justified. The data formats are shown in Figure 20 . Data
formats are selected using the FORMAT pin on the TPA3200D1. All formats require binary 2s-complement,
MSB-first audio data.
Figure 19 shows a detailed timing diagram for the serial audio interface.
Figure 19. Audio Interface Timing
PARAMETERS SYMBOL MIN TYP MAX UNITS
BCK pulse cycle time t
(BCY)
1/(32 f
S
), 1/(48 f
S
), 1/(64 f
S
) (1)
BCK high-level time t
(BCH)
35
BCK low-level time t
(BCL)
35
BCK rising edge to LRCK edge t
(BL)
10 ns
LRCK falling edge to BCK rising edge t
(LB)
10
DATA setup time t
(DS)
10
DATA hold time t
(DH)
10
(1) f
S
is the sampling frequency (e.g., 44.1 kHz, 48 kHz, 96 kHz, etc.).
14