MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 178

• 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

4.2 Burst Buffer Features
MPC555
USER’S MANUAL
The BBC offers the following features:
The ICDU offers the following features:
• Supports pipelined access to internal memory and burstable access to the exter-
• Supports the de-coupled interface with the RCPU instruction unit.
• Serves as parked master on the U-bus, resulting in zero clocks delay for RCPU
• Full utilization of the U-bus pipeline for fetch accesses.
• Tightly interfaced with L2U interface module, taking advantage of full U-bus band-
• Supports program trace and show cycle attributes.
• Supports special attribute for debug port fetch accesses.
• Is programmed using the MPC555 / MPC556 mtspr/mfspr instructions to/from
• Designed for minimum power consumption.
• Instruction code on-line decompression based on a fixed vocabulary (bounded
• No need for address translation between compressed and non-compressed ad-
• Instruction decompression takes one clock cycle.
• Code decompression is pipelined.
• No performance penalty during sequential program flow execution
InstructionAddress Bus
/
nal memory.
fetch access to cross to the U-bus.
width and back-to-back accesses.
implementation specific special-purpose registers.
Huffman) algorithm.
dress spaces — ICDU provides “next instruction address” to the RCPU
MPC556
RCPU
Figure 4-1 Burst Buffer Block Diagram
Rev. 15 October 2000
BURST BUFFER
ICDU--Decompressor
IMPU
BBC
Protection-Abort to U-bus
In-Page Access
U-bus
MOTOROLA
4-2