
CTM
REFERENCE
MOTOROLA
C-1
GLOSSARY
C
C
GLOSSARY
This section contains abbreviations and specialist words used in this data
sheet and throughout the industry.
$xxxx
The digits following the ‘$’ are in hexadecimal format.
%xxxx
The digits following the ‘%’ are in binary format.
A/D
,
ADC
Analog-to-digital (converter).
Assert
An asserted signal is driven to its active or true state, irrespective of that state being
represented by a high or low voltage level.
BIU
Bus interface unit; in a module, the interface between the IMB and the internal circuitry
of the module.
BIUSM
Bus interface unit submodule; in a module, the submodule that allows the module to
be connected to the IMB. All information transfer between the IMB and the SMB is
handled by the BIUSM.
Bootstrap mode
In this mode the device automatically loads its internal memory from an external
source on reset and then allows this program to be executed.
Bus cycle
A single transfer of data across the bus using the established protocols and timing. A
bus cycle consists of a single byte or word transfer.
Byte
Eight bits.
CCR
Condition codes register; an integral part of the CPU.
CERQUAD
A ceramic package type, principally used for EPROM and high temperature devices.
Clear
‘0’ — the logic zero state; the opposite of ‘set’.
Clock
Two tics; a full clock cycle. For a 16.67MHz clock, a clock cycle has a duration of 60ns.
CMOS
Complementary metal oxide semiconductor. A semiconductor technology chosen for
its low power consumption and good noise immunity.
Coherency
The caability of a system to handle data as if its data bus were the same width as the
data block.
COP
Computer operating properly. aka‘watchdog’. This circuit is used to detect device
runaway and provide a means for restoring correct operation.
F
.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com