Manual Reset Input - Analog Devices AD5100 Manual

AD5100
Floating WDI Input
If the WDI pin is floating, the watchdog function is disabled by
default. However, floating watchdog can be enabled in the RESET
configuration register such that a broken WDI connection or
any unusual condition that makes WDI float triggers the reset.
•
Register 0x0D[3] = 0: floating WDI input does not activate
RESET (Default)
•
Register 0x0D[3] = 1: floating WDI input activates RESET
This feature is fixed in OTP memory. Enabling or disabling the
floating WDI feature can be changed dynamically, using the
OTP overridden function is selected.

MANUAL RESET INPUT

Manual reset ( MR ) is an active low input to the AD5100 and
has an internal pull-up resistor to V
the MR pin goes low, RESET is activated. MR can be driven
from a CMOS logic signal.
The MR and RESET timing diagrams are shown in
RESET is activated after t
Note that
after the MR signal has gone high again.
t
RS_HOLD
MR has the highest priority in triggering the RESET over any
other monitoring inputs.
MR
RESET
* = PROGRAMMABLE
Figure 15. Manual Reset ( MR ) Timing Diagram
Rev. A | Page 18 of 36
. If the input signal on
3MON
and is held for
MR_DELAY
t
t
<
MR
MR_GLITCH
t
MR_DELAY
t
RS_HOLD*
Figure 15 .