MAC7200 datasheet(74/976 Pages) FREESCALE

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MAC7200 Microcontroller Family Reference Manual, Rev. 2

lxxiv

Freescale Semiconductor

Column Label

Row Content

Bits

Bit number, specifies the exact location of the bit field within the register. Always listed from the most

significant bit in the register to the least significant. For bit fields, the most significant and least

significant bit numbers are shown.

Name

Mnemonic name of the bit or field. For bit fields, the mnemonic is followed by bracketed numbers

specifying the size of the field.

Description

Full name of the bit or field. Includes a short definition of operational characteristics. Often contains

cross-references to detailed functional descriptions of module behaviors that are affected by a control

field or that are reflected in a status field. Followed by paragraphs listing definitions for each possible

value of the bit or field. For more complex definitions, or where bits or fields interact with other bits or

fields in various modes, tables are often embedded within the field description cell for more detailed

information.

0 single-bit value definitions

1 single-bit value definitions

0..0

first in a list of multi-bit field value definitions

1..1

last in a list of multi-bit-field value definitions

Table iv. Register Field Description Conventions

0000

000

0000

Reset

————

———

————

—

Reg Addr

Base + Offset

9876

5432

0000

FIELD

Reset

————

——

—

Reg Addr

Base + Offset

Figure i. Example Register (EXREG)

Table v. EXREG Field Descriptions

Bits

Name

Description

15–6

—

Reserved; always reads as zero, must be written as zero.

5–4

FIELD[1:0]

Bit field. This is a two-bit read/write field.

00 Behavior when field is written as 0b00, or status indicated when read as 0b00

01 Behavior when field is written as 0b01, or status indicated when read as 0b01

10 Behavior when field is written as 0b10, or status indicated when read as 0b10

11 Behavior when field is written as 0b11, or status indicated when read as 0b11

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