Cirrus-logic EP93xx Instrukcja Użytkownika Strona 160

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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
1514131211109876543210
RSVD SBOOT LCSn7 LCSn6 LASDO LEEDA LEECLK RSVD LCSn2 LCSn1
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