eZ80
®
CPU
User Manual
UM007714-0908 Manual Objectives
ix
Use of the Terms LSB and MSB
In this document, the terms LSB and MSB, when appearing in upper case, mean least sig-
nificant byte and most significant byte, respectively. The lowercase forms, msb and lsb,
mean least significant bit and most significant bit, respectively.
Use of Initial Uppercase Letters
Initial uppercase letters designate settings, modes, and conditions in general text.
•
Example 1: The Slave receiver leaves the data line High.
•
Example 2: The receiver forces the SCL line to Low.
•
Example 3: The Master can generate a Stop condition to abort the transfer.
Use of All Uppercase Letters
The use of all uppercase letters designates the names of states, modes, and commands.
•
Example 1: The bus is considered BUSY after the Start condition.
•
Example 2: In TRANSMIT mode, the byte is sent most significant bit first.
•
Example 3: A START command triggers the processing of the initialization sequence.
Register Access Abbreviations
Register access is designated by the following abbreviations:
Bit Numbering
Bits are numbered from 0 to n–1.
Safeguards
It is important that you understand the following safety terms, which are defined here.
Means a procedure or file may become corrupted if you do not follow
directions.
Designation Description
R Read Only
R/W Read/Write
W Write Only
— Unspecified or indeterminate
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