Motorola MPC823e Reference Manual page 675

E
0
STATUS
LENGTH
POINTER 32-BIT BUFFER POINTER
E
0
STATUS
LENGTH
32-BIT BUFFER POINTER
POINTER
E
STATUS 0
LENGTH
32-BIT BUFFER POINTER
POINTER
E
1
STATUS
LENGTH
POINTER 32-BIT BUFFER POINTER
10 CHARS
CHARACTERS
RECEIVED BY UART
TIME
Figure 16-76. SCC2 UART Receive Buffer Descriptor Example
MOTOROLA
RECEIVE BD 0
ID
0
0008
RECEIVE BD 1
ID
1
0002
RECEIVE BD 2
ID FR
1
0
0004
RECEIVE BD 3
XXXX
MPC823e REFERENCE MANUAL
Communication Processor Module
MRBLR = 8 BYTES FOR SCC2
BUFFER
FULL
IDLE TIMEOUT
OCCURRED
BYTE 4 HAS BYTE 4 ERROR!
FRAMING ERROR
ADDITIONAL
BYTES WILL BE
RECEPTION
STORED UNLESS IDLE
STILL IN
COUNT EXPIRES
PROGRESS
(MAX_IDL)
WITH THIS
BUFFER
LONG IDLE PERIOD
FOURTH CHARACTER
HAS FRAMING ERROR!
BUFFER
BYTE 1
BYTE 2
8 BYTES
ETC.
BYTE 8
BUFFER
BYTE 9
BYTE 10
8 BYTES
EMPTY
BUFFER
BYTE 1
BYTE 2
BYTE 3
8 BYTES
EMPTY
BUFFER
BYTE 5
8 BYTES
5 CHARS
PRESENT
TIME
16-221