Register Example - Cirrus Logic EP93 Series User Manual

Preface
EP93xx User's Guide
• Registers are named using mixed upper and lower case alphanumeric, for example,
SysCfg or PxDDR. Where there are multiple registers with the same names, a lower case
"x" is used as a place holder. For example, in the PxDDR registers, x represents a letter
P
from A to H, indicating the specific port being discussed
CAUTION:In the Internal Register Map in
(An example register description is shown below. This description is used for the following
examples.)
A specific bit may be specified in one of three ways:
1. Register name[bit number], for example, SysCfg[29]
2. Register name.bit field[bit number], for example, SysCfg.REV[1]
3. Register name.bit field[bit name], for example, SysCfg.SBOOT
Hexidecimal numbers are referred to as 0x0000_0000.
Binary numbers are referred to as 0000_0000b.
P.5 Register Example
Note:
SysCfg
31 30
REV
15 14
Address:
Default:
Definition:
Bit Descriptions:
P-4
memory locations are listed as Reserved. These memory locations should not
be used. Reading from these memory locations will yield invalid data. Writing to
these memory locations may cause unpredictable results.
This is only an example. For actual SysCfg register information, see
34 .
29 28 27 26
13 12 11 10
RSVD
0x8093_009C - Read/Write, Software locked
0x0000_0000
System Configuration Register. Provides various system configuration
options.
RSVD:
Copyright 2007 Cirrus Logic
"Internal Register Map" on page 2-17
25 24 23 22
RSVD
9 8 7 6
SBOOT LCSn7 LCSn6
Reserved. Unknown During Read.
"SysCfg" on page 5-
21 20 19 18
5 4 3 2
LASDO LEEDA LEECLK RSVD
some
17 16
1 0
LCSn2 LCSn1
DS785UM1