MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 619

• 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

17.1 Overview
MPC555 / MPC556
USER’S MANUAL
The time processor unit 3 (TPU3), an enhanced version of the original TPU, is an in-
telligent, semi-autonomous microcontroller designed for timing control. The TPU3 is
fully compatible to the TPU2. Operating simultaneously with the CPU, the two TPU3
modules process micro-instructions, schedules and processes real-time hardware
events, performs input and output, and accesses shared data without CPU interven-
tion. Consequently, for each timer event, the CPU setup and service times are mini-
mized or eliminated.
The MPC555 / MPC556 contains two independent TPU3s.
block diagram of a single TPU3.
The TPU3 can be viewed as a special-purpose microcomputer that performs a pro-
grammable series of two operations, match and capture. Each occurrence of either op-
eration is called an event. A programmed series of events is called a function. TPU
functions replace software functions that would require CPU interrupt service.
CONFIGURATION
SUPPORT AND
DEVELOPMENT
INTERFACE
PARAMETER
CONTROL
CHANNEL
SYSTEM
TEST
HOST
RAM
DATA
Figure 17-1 TPU3 Block Diagram
CONTROL
TIME PROCESSOR UNIT 3
DATA
TIME PROCESSOR UNIT 3
Rev. 15 October 2000
SECTION 17
MICROENGINE
SCHEDULER
EXECUTION
CONTROL
STORE
UNIT
T2CLK
PIN
CONTROL AND DATA
SERVICE REQUESTS
TCR1
TCR2
Figure 17-1
CHANNELS
CHANNEL 15
CHANNEL 0
CHANNEL 1
TIMER
is a simplified
MOTOROLA
PINS
17-1