User`s guide

Preface LZ87010 Advance User’s Guide
xvi 1/15/03
Register Tables
All Registers are presented in tabular format. A primary table presents each register’s
name, address, permissions, bit names and the register’s contents at reset. Subsequent
tables, if present, detail the specific names and function(s) of all bits and bit fields in the
register and explain any important variations that may exist.
Reading and Writing
An important detail to note is that all registers are not perfectly writable and readable. Some
will exhibit different characteristics on a write, while a read may not return the expected result.
Reserved Bits and Fields
At the same time, not all bit fields in all registers can be written, nor can all register bits and
fields yield useful information when read. These restricted register bits and fields will be
specifically called out with three slashes (///) and the word ‘Reserved’, along with their spe-
cial conditions in the bit field tables. See Table 1 and Table 2 for examples of this practice.
Table 1. Register Name
BIT 7 6 5 4 3 2 1 0
FIELD /// /// /// TRAP_EN /// DPSEL
RESET 000 0 0 0
RW RO RO RO RW RO RW
ADDR 0xA2
Table 2. Register Bit Fields
BIT NAME DESCRIPTION
7:5 /// Reserved Reads return ‘0’; write as ‘0’.
4TRAP_EN
Example Bit Name A description of this bit’s functionality will be found
in this space.
3
/// Reserved Reads return ‘0’; write as ‘0’.
2:0 DPSEL
Example Field Name
A description of these bits’ functionality will be found in this space.