Eeprom Write Protect Header (J30); Setting The Pmc Vio Keying Pin - Motorola MVME5500 Installation And Use Manual

Hardware Preparation and Installation
1

EEPROM Write Protect Header (J30)

Setting the PMC Vio Keying Pin

1-16
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.
1
2
Disables EEPROM
programming
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.
5V key option on a PMC board
J30
Enables EEPROM
programming
(factory configuration)
3.3V key option on a PMC board
J30
1
2
Literature Center Web Site