MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 403

• 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

12.1 Features
1.
MPC555 / MPC556
USER’S MANUAL
The user should not perform instruction fetches from modules on the IMB.
The U-bus to IMB3 bus interface (UIMB) Interface structure is used to connect the
CPU internal unified bus (U-bus) to the intermodule bus 3 (IMB3). It controls bus com-
munication between the U-bus and the IMB3.
The UIMB interface consists of seven submodules that control bus interface timing,
address decode, data multiplexing, intrasystem communication (interrupts), and clock
generation to allow communication between U-bus and the IMB3. The seven submod-
ules are:
• U-bus interface
• IMB3 interface
• Address decoder
• Data multiplexer
• Interrupt synchronizer
• Clock control
• Scan control
• Provides complete interfacing between the U-bus and the IMB3:
• Support of 32-bit and 16-bit BIUs for IMB3 modules
• Half and full speed operation of IMB3 bus with respect to U-bus
• Simple “slave only” U-bus interface implementation
• Supports scan control for modules on the IMB3 and on the U-bus
— 15 bits (32 Kbytes) of address decode on IMB3
— 32-bit data bus
— Read/write access to IMB3 module registers
— Interrupt synchronizer
— Monitoring of accesses to unimplemented addresses within UIMB interface
— Burst-inhibited accesses to the modules on IMB3
— Supports alternate master on IMB3
— Transparent mode operation not supported
— Relinquish and retry not supported
address range
Modules on the IMB3 bus can only be reset by SRESET. Some mod-
ules may have a module reset, also.
U-BUS TO IMB3 BUS INTERFACE (UIMB)
U-BUS TO IMB3 BUS INTERFACE (UIMB)
Rev. 15 October 2000
SECTION 12
NOTE
1
MOTOROLA
12-1