Programmers Model
ARM DUI 0447J
Copyright © 2009-2014, ARM. All rights reserved.
4-22
ID052914
Non-Confidential
Note
The same interface is accessible from the MCC command line. See the
ARM
®
Versatile
™
Express
Configuration Technical Reference Manual
CFG command.
Configuration Control Register
The SYS_CFGCTRL Register characteristics are:
Purpose
Controls the transfer of data across the SPI interface between the MCC
and a Daughterboard Configuration Controller.
Usage constraints
See
Table 4-18
and
Table 4-19 on page 4-23
.
Configurations
Available in all configurations.
Attributes
See
Table 4-3 on page 4-8
.
Figure 4-13
shows the register bit assignments.
Figure 4-13 SYS_CFGCTRL Register bit assignments
Table 4-18
shows the register bit assignments.
31
0
DCC
Function
Position
Device
11
12
15
16
18
19
20
25
26
17
29
30
Site
Undefined
Write
Start
Table 4-18 SYS_CFGCTRL Register bit assignments
Bits
Name
Description
[31]
Start
Initiates the transfer.
[30]
Write
Read or write data:
b1
Write.
b0
Read.
[29:26]
DCC
Daughterboard Configuration Controllers.
This is a 4-bit number for the
particular
Daughterboard Configuration Controller
on a board to access.
Examples are:
b0000
DCC 0.
b0001
DCC 1.
[25:20]
Function
6-bit value that describes the function of the device being written to. See
SYS_CFGCTRL function values
on page 4-23
.
[19:18]
-
Undefined.