24-10
MPC860 PowerQUICC UserÕs Manual
MOTOROLA
Part V. The Communications Processor Module
last buffer of a frame contains the total number of frame bytes, including the 2 or 4 bytes
for CRC. Figure 24-6 shows an example of how RxBDs are used in receiving.
Figure 24-6. SCC HDLC Receiving using RxBDs
Buffer
0
0x0008
32-Bit Buffer Pointer
1
E
F
Receive BD 0
Status
Length
Pointer
0
0x000B
32-Bit Buffer Pointer
0
E
F
Receive BD 1
Status
Length
Pointer
0
0x0003
32-Bit Buffer Pointer
1
E
F
Receive BD 2
Status
Length
Pointer
1
XXXX
32-Bit Buffer Pointer
E
Receive BD 3
Status
Length
Pointer
Address 1
Address 2
Control Byte
Buffer
CRC Byte 1
CRC Byte 2
Buffer
Address 1
Address 2
Buffer
Control Byte
Empty
8 Bytes
8 Bytes
8 Bytes
8 Bytes
Two Frames
Received in HDLC
Unexpected Abort
Stored in Rx Buffer
Line Idle
Occurs before
Present
Time
Time
Stored in Rx Buffer
Buffer Full
Buffer Closed
when Closing Flag
Buffer
Still Empty
1
AB
5
Empty
MRBLR = 8 Bytes for this SCC
Empty
Last I-Field Byte
Information
(I-Field) Bytes
Received
Abort was
Received after
Control Byte
0
L
1
L
1
L
F
A
A
C
I
I
I
I
I
I
CR CR F
Closing Flag
Abort/Idle
F
A
A
C
Legend:
F = Flag
A = Address Byte
C = Control Byte
I = Information Byte
CR = CRC Byte
Summary of Contents for MPC860 PowerQUICC
Page 3: ...MPC860UM AD 07 98 REV 1 MPC860 PowerQUICC ª UserÕs Manual ...
Page 36: ...xxxvi MPC860 PowerQUICC UserÕs Manual MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Page 78: ...I iv MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
Page 88: ...1 10 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
Page 114: ...3 16 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
Page 226: ...8 32 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part II PowerPC Microprocessor Module ...
Page 262: ...9 36 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part II PowerPC Microprocessor Module ...
Page 274: ...III iv MPC860 PowerQUICC UserÕs Manual MOTOROLA Part III Configuration ...
Page 320: ...12 12 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part III Configuration ...
Page 325: ...MOTOROLA Part IV Hardware Interface IV v Part IV Hardware Interface ...
Page 326: ...IV vi MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Page 352: ...13 26 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Page 394: ...14 42 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Page 426: ...15 32 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Page 530: ...17 26 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Page 632: ...21 44 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Page 660: ...22 28 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Page 708: ...24 24 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Page 748: ...27 20 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Page 846: ...31 20 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Page 914: ...35 12 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Page 948: ...36 34 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Page 998: ...37 48 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part VI Debug and Test ...
Page 1016: ...A 10 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Page 1024: ...B 8 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Page 1030: ...C 6 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Page 1086: ...Glossary 12 MPC860 PowerQUICC UserÕs Manual MOTOROLA ...
Page 1106: ......