Texas Instruments TMS320C6745 DSP - Bit Order and Word Alignment Within a Slot Examples

1
0
0
1
0 0
2 3
0 1 1 1
4 5 6 7 10
0
9
0 0
118
0
Bit
Time
5
0 0 0 0 1
0 1 2 3 4
0 0 0 0 11 1
6 7 8 109 11
510 432 876 119 10
1 1 1 0000 1 0000
5
0 1 2 3 4 6 7 8 109 11
00 0 0 1 1 1 0 00 0 1
50 1 2 3 4 6 7 8 109 11
1 0 0 0 0 1 1 1 1 1 11
5
10 432 876 119 10
11 11 1 0 0 00 1 1 1
50 1 2 3 4 6 7 8 109 11
1 1 1 0 0 0 0 11 11 1
510 32 4 6 87 109 11
1 1 11 1 1 1 00 0 0 1
5
0 1 42 3 7 86 119 10
11 1 0 0 0 0 00 0 0 0
50 1 2 3 4 6 7 8 109 11
00 0 0 0 1 1 00 00 1
8-bit word
12-bit slot
1 Unshaded: bit belongs to word Shaded: bit is a pad bit1
(a) 87h as 8-bit word, 12-bit slot,
left align, MSB first, pad zeros
87h as 8-bit word, 12-bit slot,(b)
right align, MSB first, pad zeros
left align, LSB first, pad zeros
87h as 8-bit word, 12-bit slot,(c)
right align, LSB first, pad zeros
87h as 8-bit word, 12-bit slot,(d)
87h as 8-bit word, 12-bit slot,
left align, MSB first, pad with bit 7
(e)
87h as 8-bit word, 12-bit slot,
right align, MSB first, pad with bit 4
(f)
87h as 8-bit word, 12-bit slot,
left align, LSB first, pad with bit 7
(g)
87h as 8-bit word, 12-bit slot,
right align, LSB first, pad with bit 4
(h)
left align, LSB first, pad with bit 7
07h as 8-bit word, 12-bit slot,(i)
right align, LSB first, pad with bit 4
86h as 8-bit word, 12-bit slot,(j)
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SPRUH91D–March 2013–Revised September 2016
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Multichannel Audio Serial Port (McASP)
Figure 24-13. Bit Order and Word Alignment Within a Slot Examples