Motorola MPC823e - Page 829

Communication Processor Module
MOTOROLA MPC823e REFERENCE MANUAL 16-375
USB
COMMUNICATION
16
PROCESSOR MODULE
Figure 16-114. USB Buffer Descriptor Ring
FRAME STATUS
DATA LENGTH
DATA POINTER
USB ENDPOINT 1
DUAL- PORT RAM EXTERNAL MEMORY
TX BUFFER DESCRIPTORS
TX DATA BUFFER
RX DATA BUFFER
EP0 RX BD
TABLE POINTER
EP0 TX BD
TABLE POINTER
FRAME STATUS
DATA LENGTH
DATA POINTER
TX BUFFER DESCRIPTORS
TX DATA BUFFER
ENDPOINT 3
TX BD TABLE
ENDPOINT 0
TX BD TABLE
ENDPOINT 0
RX BD TABLE
ENDPOINT 3 RX BD
TABLE
EP3 RX BD
TABLE POINTER
EP3 TX BD
TABLE POINTER
FRAME STATUS
DATA LENGTH
DATA POINTER
RX BUFFER DESCRIPTORS
FRAME STATUS
DATA LENGTH
DATA POINTER
RX BUFFER DESCRIPTORS
RX DATA BUFFER