Jp4 - Watchdog; Jp8 – Battery Backup Enable/Disable; Other Jumpers - GE D20 Installation And Operation Manual

D20/D200
Installation and Operations Guide
Connections and Configuration
D20ME Jumpering
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JP4 - Watchdog This 2-position jumper enables or disables the hardware Watchdog.
Note:
Pin 1 = SLOWCK
Pin 3 = /WD
JP8 – Battery The D20ME card has two 3.6V lithium batteries to maintain NVRAM contents in the
event of a power failure.
Backup
Enable/disable
Important: Disconnect the batteries if the board is to be stored for extended periods.
Jumper

Other Jumpers

Jumpers JP5, JP6 and JP7 are not user configurable. They are for factory test only.
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The Watchdog should never be left disabled during normal operation of
the D20ME.
JP4 Pins Jumper Position
pin 1 to 2 (center)
pin 3 to 2 (center)
Position
JP8 pin 1 to 2
pin 3 to 2
pins 4 to 5
994-0078-2.00-7
disables the hardware Watchdog.
enables the hardware Watchdog.
Function
disconnects the batteries from the NVRAM
connects the batteries to the NVRAM
always jumpered
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Function
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