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Synchronous Serial Interface (SSI)
SRX
RXSR
Bit 15 is shifted in first. The number of bits shifted is based on word length.
Zeros are added to end of data string for smaller words (8, 10 or 12 bits).
Figure 30-10. Receive Data Path (RXBIT0 = 0, RSHFD = 0)
15 14 13 12 11 10 9
SRX
15 14 13 12 11 10 9
SSI_RXDAT
The first bit shifted in depends on word length.
Arrowheads indicate the bit shifted in first in each case; remaining higher bits are then
shifted in. Bit 15 is always shifted in last.
Figure 30-11. Receive Data Path (RXBIT0 = 0, RSHFD = 1)
SSI_RXDAT
Bit 0 is shifted in first. The number of bits shifted is based on word length.
Zeros are added to end of the data string for smaller words (8, 10 or 12 bits).
Figure 30-12. Receive Data Path (RXBIT0 = 1, RSHFD = 0)
30-14
8-Bit Word
10-Bit Word
12-Bit Word
16-Bit Word
15 14 13 12 11 10 9
8
15 14 13 12 11 10 9
8
8-Bit Word
10-Bit Word
12-Bit Word
16-Bit Word
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16-Bit Word
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MC9328MX1 Reference Manual
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10-Bit Word
12-Bit Word
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SSI_RXDAT
RXSR
SRX
RXSR
MOTOROLA
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