MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 542

• 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

15.5 MIOS1 Bus System
15.5.1 Read/Write and Control Bus
15.5.2 Request Bus
15.5.3 Counter Bus Set
15.6 MIOS1 Programmer’s Model
MPC555
USER’S MANUAL
The internal bus system within the MIOS1 is called the modular I/O bus (MIOB). The
MIOB makes communications possible between any submodule and the IMB3 bus
master through the MBISM.
The MIOB is divided into three dedicated buses:
The read/write and control bus (RWCB) allows read and write data transfers to and
from any I/O submodule through the MBISM. It includes signals for data and address-
es as well as control signals. The control signals allow 16-bit simple synchronous sin-
gle master accesses and supports fast or slow master accesses.
The request bus (RQB) provides interrupt request signals along with I/O submodule
identification and priority information to the MBISM.
Note that some submodules do not generate interrupts and are therefore independent
of the RQB.
The 16-bit counter bus set (CBS) is a set of two 16-bit counter buses. The CBS makes
it possible to transfer information between submodules. Typically, counter submod-
ules drive the CBS, while action submodules process the data on these buses. Note,
however, that some submodules are self-contained and therefore independent of the
counter bus set.
The address space of the MIOS1 consist of four Kbytes starting at the base address
of the module. The MIOS1 base address is a multiple of the addressable range. The
overall address map organization is shown in
To find the base address of a given implementation, refer to
Address
• The read/write and control bus
• The request bus
• The counter bus set
/
MPC556
Map. To find the submodule base address, refer to
MODULAR INPUT/OUTPUT SUBSYSTEM (MIOS1)
Rev. 15 October 2000
Figure
15-2.
Table
1.3 MPC555 / MPC556
15-36.
MOTOROLA
15-6