Cirrus Logic EP93xx User Manual
Page 160
5-34
DS785UM1
Copyright 2007 Cirrus Logic
System Controller
EP93xx User’s Guide
5
5
5
SysCfg
Address:
0x8093_009C - Read/Write, Software locked
Default:
0x0000_0000
Definition:
System Configuration Register. Provides various system configuration
options.
Bit Descriptions:
RSVD:
Reserved. Unknown During Read.
REV:
Revision: Reads chip Version number:
0000 - Rev A
0001 - Rev B
0010 - Rev C
0011 - Rev D0
0100 - Rev D1
0101 - Rev E0
SBOOT:
Serial Boot Flag.
1 - hardware detected Serial Boot selection,
0 - hardware detected Normal Boot. This bit is read-only.
LCSn7, LCSn6:
Latched version of CSn7 and CSn6 respectively. These
are used to define the external bus width for the boot
code.
LASDO:
Latched version of ASDO pin. Used to select synchronous
versus asynchronous boot device.
LEEDA:
Latched version of EEDAT pin.
LEECLK:
Define Internal or external boot:
1 - Internal
0 - External
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
REV
RSVD
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSVD
SBOOT
LCSn7
LCSn6
LASDO
LEEDA
LEECLK
RSVD
LCSn2
LCSn1