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emPC-CXR
(
Hardware Manual
)
•
System Control
©
Janz Tec AG
Rev. V1.2
Generally it will be higher for a system with high power consumption to
prevent operation with low voltage and high current.
VS0
Pointer 11 (16bit, rw)
15
0
VS0
RESET:
Restored from EEPROM
VS0
If the sense voltage level is below VS0 for a certain time, a system
shutdown is triggered. When the voltage level is above VIN2+VHYST for
a certain time, then a system startup is triggered. Refer to the various
timing parameters for more details.
Program this register to zero to disable the sense voltage function. The
sense voltage level can be read from VS_ACTUAL regardless of the VS0
setting.
VHYST
Pointer 12 (16bit, rw)
15
0
VHYST
RESET:
Restored from EEPROM
VHYST
This register sets the hysteresis for the power supply and sense input
signals.
TIN11
Pointer 18 (16bit, rw)
15
0
TIN11
RESET:
Restored from EEPROM
TIN11
Reset delay (see VIN1).
TIN21
Pointer 19 (16bit, rw)
15
0
TIN21
RESET:
Restored from EEPROM
TIN21
Power good delay (see VIN2).
TS0
Pointer 20 (16bit, rw)
15
0
TS0
RESET:
Restored from EEPROM
TS0
When VS is below the VS0 threshold for longer than TS0, then a system
shutdown is triggerd. If VS passed VS0+VHYST before TS0 expires, then
no action is taken.
However, once a system shutdown has been triggered it cannot be
aborted by rising VS.