MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 181

• Manufacturer Part Number: MPC555CME
• Description: KIT EVALUATION FOR MPC555
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC555CME

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC555
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: MPC555
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MPC555
USER’S MANUAL
c
Each instruction is divided to four bytes, marked X1, X2, X3 and X4. For each such
byte a separate (Huffman coding) vocabulary is generated, marked Tx1, Tx2, Tx3 and
Tx4. Once compressed, each instruction yields four symbols (corresponding to the X1,
X2, X3, and X4 input bytes). Therefore, in order to compress a given code, four vocab-
ularies are required. This partitionong produced a better comression ratio.
10
14
0
4
8
8
18
Original Code
/
0
MPC556
1
0
2
vocabulary1
Tx1
Figure 4-2 Example of Compressed Code
X1
3
Figure 4-3 Instruction Coding
4
7
8
vocabulary2
Rev. 15 October 2000
BURST BUFFER
Tx2
X2
c
10
14
15
0
4
8
8
18
16
Compressed
vocabulary3
X3
0
Tx3
SAVED
23 24
3
vocabulary4
X4
Tx4
2
31
1
MOTOROLA
4
4-5