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Hardware Preparation and Installation
1
EEPROM Write Protect Header (J30)
A 2-pin planar header enables/disables programming of the on-board
EEPROMs as a means of protecting the contents from being corrupted. No
jumper installed disables EEPROM programming by driving the WP pin
to a logic high. The jumper must be installed in order to program any of the
EEPROMs at addresses A0, A6, A8, and/or AA.
Setting the PMC Vio Keying Pin
Signalling voltage (Vio) is determined by the location of the PMC Vio
keying pin. Each site can be independently configured for either 5V or
3.3V signalling. The option selected can be determined by observing the
location of the Vio keying pin.
1
2
Disables EEPROM
J30
(factory configuration)
1
2
J30
programming
Enables EEPROM
programming
3.3V key option on a PMC board
5V key option on a PMC board