mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 64

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Conventions
1.2.2 Typographic notation
The following typographic notation is used throughout this document:
1.2.3 Special terms
The following terms have special meanings:
64
placeholder, x
code
SR[SCM]
REVNO[6:4], XAD[7:0]
asserted
deasserted
reserved
Example
Term
Items in italics are placeholders for information that you provide. Italicized text is also used
for the titles of publications and for emphasis. Plain lowercase letters are also used as
placeholders for single letters and numbers.
Fixed-width type indicates text that must be typed exactly as shown. It is used for instruction
mnemonics, directives, symbols, subcommands, parameters, and operators. Fixed-width
type is also used for example code. Instruction mnemonics and directives in text and tables
are shown in all caps (for example, BSR).
A mnemonic in brackets represents a named field in a register. This example refers to the
Scaling Mode (SCM) field in the Status Register (SR).
Numbers in brackets and separated by a colon represent either:
MCF51JF128 Reference Manual, Rev. 2, 03/2011
• A subset of a register's named field
• A continuous range of individual signals of a bus
For example, REVNO[6:4] refers to bits 6–4 that are part of the COREREV field that
occupies bits 6–0 of the REVNO register.
For example, XAD[7:0] refers to signals 7–0 of the XAD bus.
Preliminary
Refers to the state of a signal as follows:
Refers to the state of a signal as follows:
In some cases, deasserted signals are described as
negated.
Refers to a memory space or programming setting.
• An active-high signal is asserted when high (1).
• An active-low signal is asserted when low (0).
• An active-high signal is deasserted when low (0).
• An active-low signal is deasserted when high (1).
• Do not modify the default value of a reserved
• Consider undefined locations in memory to be
programming setting, such as the reset value of a
reserved register bitfield.
reserved.
Description
Meaning
Freescale Semiconductor, Inc.