Universal Serial Bus Controller User's Guide

4.35 Transmit CPPI DMA State Word 5 (TCPPIDMASTATEW5)
4.36 Transmit CPPI Completion Pointer (TCPPICOMPPTR)
Registers www.ti.com
Table 50. Transmit CPPI DMA State Word 4 (TCPPIDMASTATEW4) Field Descriptions (continued)
Bit Field Value Description
15-0 CURR_BUFFER_LENGTH 0-FFFFh Current Buffer Length
Indicates how many valid bytes remain in the current buffer that is being
transmitted from
The Transmit CPPI DMA State Word 5 (TCPPIDMASTATEW5) is shown in Figure 50 and described in
Table 51 .
Figure 50. Transmit CPPI DMA State Word 5 (TCPPIDMASTATEW5)
31 16
REM_LENGTH
R/W-0
15 0
LENGTH
R/W-0
LEGEND: R/W = Read/Write; - n = value after reset
Table 51. Transmit CPPI DMA State Word 5 (TCPPIDMASTATEW5) Field Descriptions
Bit Field Value Description
31-16 REM_LENGTH 0-FFFFh Remaining Packet Length
Indicates how many bytes remain to be transmitted in the packet before truncation occurs
15-0 LENGTH 0-FFFFh Packet Length
Indicates how many bytes are contained in the packet. This value is copied from the
packet-length field in Word 3 of the SOP Descriptor. This value is written into the AAL5 trailer
for the packet.
The Transmit CPPI Completion Pointer (TCPPICOMPPTR) is shown in Figure 51 and described in
Table 52 .
Figure 51. Transmit CPPI Completion Pointer (TCPPICOMPPTR)
31 16
DESC_ADDR
R/W-0
15 2 1 0
DESC_ADDR Reserved WRBK_MODE
R/W-0 R-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Universal Serial Bus (USB) Controller104 SPRUGH3 – November 2008
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