Nxp Semiconductors UM10237 用户手册
UM10237_2
© NXP B.V. 2008. All rights reserved.
User manual
Rev. 02 — 19 December 2008
361 of 792
NXP Semiconductors
UM10237
Chapter 13: LPC24XX USB device controller
For simplicity, USBDevIntEn and USBDMAIntEn are not shown.
Fig 47. Interrupt event handling
USB_INT_REQ_HP
USB_INT_REQ_LP
USB_INT_REQ_DMA
EN_USB_INTS
to VIC
channel
#22
channel
#22
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FRAME
EP_FAST
EP_SLOW
USBDevIntPri[0]
USBDevIntPri[1]
USBEpIntPri[n]
USBEpIntSt
USBDMARSt
to DMA engine
interrupt
event on
event on
EPn
n
n
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0
31
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0
31
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0
31
USBEoTIntST
USBNDDRIntSt
USBSysErrIntSt
EOT
NDDR
ERR
USBDevIntSt
USBIntSt
USBEpIntEn[n]
from other
Endpoints
USBDMAIntSt
Slave mode
DMA Mode
ERR_INT