Kontron CP372 - Manual (Page 53)

CP372 Configuration
ID 25780, Rev. 01 © 2002 Kontron Modular Computers GmbH Page 4 - 7
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P R E L I M I N A R Y
4.2.4 External Cluster Enable/Disable
The CP372 provides two possibilities to enable or disable all the outputs of an entire cluster at
one time. Each individual cluster may be controlled either per software or hardware, whereby
the hardware control has priority over the software control. Information regarding the software
control is provided with the driver software. The hardware control capability is described as fol-
lows.
To make use of the hardware control capability the application must provide some form of ex-
ternal switching capabilty. Figure 4-3 provides basic information for configuring an external
switch. Upon power up of the CP372, the output of each cluster is disabled until such time as
the application software requests an output of the cluster. After cluster output is enabled, it can
still be controlled by external switching. This feature permits external intervention either auto-
matically or manually at any time independent of the applicaton software.
Figure 4-4: External Cluster Enable/Disable
analog ground
R
load
R
load
R
load
R
load
S
off
S 1
S 2
S 3
S 4
off
Ch 0
Ch 1
Ch 2
Ch 3
CON 2
CP372
Example for Cluster A
(AGND)