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MB86R02 'Jade-D' Hardware Manual V1.64
(2) Reception word alignment
Serial data input pin's shifting direction
Bit extension and right justification
BEXT = 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
BEXT = 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
BEXT = 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
BEXT = 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
This chart shows word line example of when word length is 8.
The word received from serial bus is always written to reception FIFO after right-justified.
Therefore, read access should be performed from AHB bus to RXFDAT in order to read as
follows:
Word length
• 8 or less:
• 9 – 16:
• 17 – 32:
27-32
B0 B1 B2 B3 B4 B5 B6 B7
B7 B6 B5 B4 B3 B2 B1 B0
MLSB
RXFDAT
Figure 27-5 Reception word line chart
Byte 0
Half word 0
All words.
MSB First
0
Write to reception FIFO
9
8
LSB First
B7 B6 B5 B4 B3 B2 B1 B0
1
LSB
LSB
LSB
LSB
7
6
5
4
3
2
1
0
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