IXF1104
Table 3. SPI3 Interface Signal Descriptions (Sheet 8 of 8)
Signal Name | Ball | Type | Standard | Description |
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MPHY | SPHY | Designator |
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| Receive End of Packet. | ||
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| REOP indicates the end of a packet when | ||
REOP_0 | REOP_0 | C16 |
| 3.3 V | asserted with RVAL. | ||
| REOP_1 | D18 | Output |
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| REOP_2 | C23 | LVTTL | all 32 bits. |
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| REOP_3 | J19 |
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| 4 x 8 | ||
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| bits correspond to the RDAT[7:0]_n | ||
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| channels. |
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| Receive Word Modulo: | ||
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| indicates the valid bytes of data in | ||
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| RDAT[31:0]. During transmission, RMOD is | ||
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| always “00”, except when the last double- | ||
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| word is transferred on RDAT[31:0]. | ||
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| RMOD[1:0] specifies the valid packet data | ||
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| bytes on RDAT[31:0] when REOP is | ||
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| asserted. |
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RMOD1 |
| G13 |
| 3.3 V | RMOD[1:0] | Valid Bytes of RDAT | |
NA | Output | 00 = 4 bytes [31:0] | |||||
RMOD0 | G14 | LVTTL | |||||
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| 01 = 3 bytes [31:8] | |||||
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| 10 = 2 bytes [31:16] | ||
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| 11 = 1 byte [31:24] | ||
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| 4 x 8 | ||
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| required. |
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| RMOD is considered valid only when RVAL | ||
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| is simultaneously asserted. | ||
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| RENB must be asserted for RMOD[1:0] to | ||
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| be valid. |
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| Receive Start of Transfer. | ||
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| when the | ||
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| the RDAT bus. When RSX is High and | ||
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| RVAL = 0, the value of RDAT[7:0] is the | ||
RSX | NA | E13 | Output | 3.3 V | address of the receive FIFO to be selected. | ||
LVTTL | Subsequent data transfers on RDAT are | ||||||
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| from the FIFO specified by this | ||
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| address. Values of 0, 1, 2, and 3 select the | ||
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| corresponding port. RSX is ignored when | ||
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| RVAL is | ||
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| 4 x 8 | ||
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Datasheet | 45 |
Document Number: 278757
Revision Number: 007
Revision Date: March 25, 2004