Preliminary
Registers
www.ti.com
20.9.1.11 USBSS IRQ_DMA_THRESHOLD_TX0_3 Register (IRQDMATHOLDTX03)
The USBSS IRQ_DMA_THRESHOLD_TX0_3 register (IRQDMATHOLDTX03) defines the size of the
four DMA thresholds for interrupt pacing for USB0. Each threshold contains an 8-bit unsigned number
and can range from 0 to 255. A possible interrupt can be triggered if the count for that specific endpoint
has exceeded the value of the threshold. The counter for the compared value is also an 8-bit unsigned
number; therefore, setting the threshold to 255 prevents the possibility of a trigger.
The USBSS IRQ_DMA_THRESHOLD_TX0_3 register is shown in
and described in
.
Figure 20-32. USBSS IRQ_DMA_THRESHOLD_TX0_3 Register (IRQDMATHOLDTX03)
31
24 23
16 15
8
7
0
dma_thres_tx0_15
dma_thres_tx0_14
dma_thres_tx0_13
dma_thres_tx0_12
R/W-0
R/W-0
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 20-42. USBSS IRQ_DMA_THRESHOLD_TX0_3 Register (IRQDMATHOLDTX03) Field
Descriptions
Bits
Field
Description
31-24
dma_thres_tx0_
DMA threshold value for tx_pkt_cmp_0 for USB0 endpoint 15.
15
23-16
dma_thres_tx0_
DMA threshold value for tx_pkt_cmp_0 for USB0 endpoint 14.
14
15-8
dma_thres_tx0_
DMA threshold value for tx_pkt_cmp_0 for USB0 endpoint 13.
13
7-0
dma_thres_tx0_
DMA threshold value for tx_pkt_cmp_0 for USB0 endpoint 12.
12
20.9.1.12 USBSS IRQ_DMA_THRESHOLD_RX0_0 Register (IRQDMATHOLDRX00)
The USBSS IRQ_DMA_THRESHOLD_RX0_0 register (IRQDMATHOLDRX00) defines the size of the
four DMA thresholds for interrupt pacing for USB0. Each threshold contains an 8-bit unsigned number
and can range from 0 to 255. A possible interrupt can be triggered if the count for that specific endpoint
has exceeded the value of the threshold. The counter for the compared value is also an 8-bit unsigned
number; therefore, setting the threshold to 255 prevents the possibility of a trigger.
The USBSS IRQ_DMA_THRESHOLD_RX0_0 register is shown in
and described in
.
Figure 20-33. USBSS IRQ_DMA_THRESHOLD_RX0_0 Register (IRQDMATHOLDRX00)
31
24 23
16 15
8
7
0
dma_thres_rx0_3
dma_thres_rx0_2
dma_thres_rx0_1
Reserved
R/W-0
R/W-0
R/W-0
R-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 20-43. USBSS IRQ_DMA_THRESHOLD_RX0_0 Register (IRQDMATHOLDRX00) Field
Descriptions
Bits
Field
Description
31-24
dma_thres_rx0_3
DMA threshold value for rx_pkt_cmp_0 for USB0 endpoint 3.
23-16
dma_thres_rx0_2
DMA threshold value for rx_pkt_cmp_0 for USB0 endpoint 2.
15-8
dma_thres_rx0_1
DMA threshold value for rx_pkt_cmp_0 for USB0 endpoint 1.
7-0
Reserved
Always read as 0. Writes have no effect.
1838Universal Serial Bus (USB)
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
Страница 2: ...Preliminary 2 SPRUGX9 15 April 2011 Submit Documentation Feedback 2011 Texas Instruments Incorporated...
Страница 92: ...92 Read This First SPRUGX9 15 April 2011 Submit Documentation Feedback 2011 Texas Instruments Incorporated...
Страница 1122: ...1122 Multichannel Audio Serial Port McASP SPRUGX9 15 April 2011 Submit Documentation Feedback 2011 Texas Instruments Incorporated...
Страница 1562: ...1562 Real Time Clock RTC SPRUGX9 15 April 2011 Submit Documentation Feedback 2011 Texas Instruments Incorporated...
Страница 1658: ...1658 Timers SPRUGX9 15 April 2011 Submit Documentation Feedback 2011 Texas Instruments Incorporated...
Страница 1750: ...1750 UART IrDA CIR Module SPRUGX9 15 April 2011 Submit Documentation Feedback 2011 Texas Instruments Incorporated...
Страница 1984: ...1984 Universal Serial Bus USB SPRUGX9 15 April 2011 Submit Documentation Feedback 2011 Texas Instruments Incorporated...