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4.31 Transmit CPPI DMA State Word 1 (TCPPIDMASTATEW1)
The Transmit CPPI DMA State Word 1 (TCPPIDMASTATEW1) is shown in Figure 46 and described in Table 47.
Figure 46. Transmit CPPI DMA State Word 1 (TCPPIDMASTATEW1)
31 |
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| 16 |
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| SOP_DESCRIPTOR_PTR |
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15 |
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| 2 | 1 | 0 |
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| SOP_DESCRIPTOR_PTR | Reserved | IN_PACKET | |
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LEGEND: R/W = Read/Write; R = Read only; |
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| Table 47. Transmit CPPI DMA State Word 1 (TCPPIDMASTATEW1) Field Descriptions | ||||
Bit | Field | Value | Description |
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SOP_DESCRIPTOR_PTR | Start of Packet Buffer Descriptor Pointer |
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| current packet |
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1 | Reserved | 0 | Reserved |
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0 | IN_PACKET |
| Flag indicating the DMA is in the middle of processing a packet |
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| 0 | Not currently in packet |
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| 1 | Currently in packet |
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4.32 Transmit CPPI DMA State Word 2 (TCPPIDMASTATEW2)
The Transmit CPPI DMA State Word 2 (TCPPIDMASTATEW2) is shown in Figure 47 and described in Table 48.
Figure 47. Transmit CPPI DMA State Word 2 (TCPPIDMASTATEW2)
31 |
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| 16 |
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| CURR_DESCRIPTOR_PTR |
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15 |
| 2 | 1 | 0 |
| CURR_DESCRIPTOR_PTR | TRUNCATED_NON_EOP | Reserved | |
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LEGEND: R/W = Read/Write; R = Read only; |
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| Table 48. Transmit CPPI DMA State Word 2 (TCPPIDMASTATEW2) Field Descriptions | |||
Bit | Field | Value | Description |
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CURR_DESCRIPTOR_PTR | Current Buffer Descriptor Pointer |
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| being transmitted |
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1 | TRUNCATED_NON_EOP |
| Flag indicating that packet truncation has occurred on the current packet within a | |
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| buffer which was not designated as the end of packet buff |
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| 0 | Truncation within non end of packet buffer has not occurred |
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| 1 | Truncation within non end of packet has occurred |
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102 | Universal Serial Bus (USB) Controller |