Specifications

Hardware Description
ARM DUI 0447J Copyright © 2009-2014, ARM. All rights reserved. 2-6
ID052914 Non-Confidential
2.2 Power up, on/off and reset signals
You can use either of the push buttons to reset the system, but only the ON/OFF push button
can power up the system. The motherboard drives two reset signals to each daughterboard and
receives a reset-request signal from each daughterboard.
Figure 2-2 shows the power up ON/OFF/Soft Reset push button and Hardware RESET
push-button signals in the system.
Figure 2-2 Reset signals
Note
To completely power down the system, you must turn off the external 12V power supply.
See also the ARM
®
Versatile
™
Express Configuration Technical Reference Manual for an
overview of the startup sequence and the operation of the ON/OFF/Soft Reset and Hardware
Reset push-button switches.
Test chip
Motherboard Express μATX
CoreTile Express
(daughterboard site 1)
Daughterboard
Configuration
Controller
Motherboard Configuration
Controller (MCC)
Reset and start
code execution
FPGA
LogicTile Express
(daughterboard site 2)
HDRY2
HDRY
Load FPGA
image and
reset
ON/OFF/Soft Reset
pushbutton
Hardware RESET
pushbutton
CB
CB
CB_nPOR
CB_nRST
CB_RSTREQ
HDRY
HDRY1
CB_nPOR
CB_nRST
CB_RSTREQ
Daughterboard
Configuration
Controller