User's Manual

4.41 Receive CPPI DMA State Word 4 (RCPPIDMASTATEW4)
4.42 Receive CPPI DMA State Word 5 (RCPPIDMASTATEW5)
www.ti.com Registers
The Receive CPPI DMA State Word 4 (RCPPIDMASTATEW4) is shown in Figure 56 and described in
Table 57 .
Figure 56. Receive CPPI DMA State Word 4 (RCPPIDMASTATEW4)
31 0
CURR_BUFFER_PTR
R/W-0
LEGEND: R/W = Read/Write; - n = value after reset
Table 57. Receive CPPI DMA State Word 4 (RCPPIDMASTATEW4) Field Descriptions
Bit Field Value Description
31-0 CURR_BUFFER_PTR 0-FFFF FFFFh Current Buffer Pointer
32-bit absolute byte address in buffer into which data is currently being received
The Receive CPPI DMA State Word 5 (RCPPIDMASTATEW5) is shown in Figure 57 and described in
Table 58 .
Figure 57. Receive CPPI DMA State Word 5 (RCPPIDMASTATEW5)
31 16
PKT_LENGTH
R/W-0
15 0
CURR_BUFFER_LENGTH
R/W-0
LEGEND: R/W = Read/Write; - n = value after reset
Table 58. Receive CPPI DMA State Word 5 (RCPPIDMASTATEW5) Field Descriptions
Bit Field Value Description
31-16 PKT_LENGTH 0-FFFFh Packet Length
Indicates how many bytes are contained in the packet. This value is written into
bits 15:0 of Word 3 of the SOP Descriptor during end of packet processing.
15-0 CURR_BUFFER_LENGTH 0-FFFFh Current Buffer Length
Indicates how many free bytes remain in the current buffer that is being received
into
SPRUGH3 – November 2008 Universal Serial Bus (USB) Controller 109
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