Freescale Semiconductor MPC8260 - Manual (Page 828)

Serial Management Controllers (SMCs)
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
27-16 Freescale Semiconductor
Figure 27-7. RxBD Example
Byte 5
Buffer
0
0008
32-Bit Buffer Pointer
0
E ID
Receive BD 0
Status
Length
Pointer
0
0002
32-Bit Buffer Pointer
1
E ID
Receive BD 1
Status
Length
Pointer
0
0004
32-Bit Buffer Pointer
0
E ID
Receive BD 2
Status
Length
Pointer
1
XXXX
32-Bit Buffer Pointer
E
Receive BD 3
Status
Length
Pointer
Byte 1
Byte 2
Byte 8
Buffer
Byte 9
Byte 10
Buffer
Byte 1
Byte 2
Byte 3
Buffer
Byte 4 Error!
Empty
Additional Bytes
are Stored Unless
Idle Count Expires
(MAX_IDL)
8 Bytes
8 Bytes
8 Bytes
8 Bytes
Characters
Received by UART
Fourth Character
10 Characters
Long Idle Period
has Framing Error!
Present
Time
Time
5 Characters
Buffer Full
Idle Time-Out
Occurred
Byte 4 has
Framing Error
Reception
Still in Progress
with this Buffer
1
FR
etc.
Empty
MRBLR = 8 Bytes for this SMC