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EEPROM Write Protect Switch (S3-3) Hardware Preparation and Installation
MVME55006E Single-Board Computer Installation and Use (6806800A37D)
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1.6.11 EEPROM Write Protect Switch (S3-3)
This switch enables/disables programming of the on-board EEPROMs as a means of protecting
the contents from being corrupted. Set to 1, it disables EEPROM programming by driving the
WP pin to a logic high. Set to ON to program any of the EEPROMs at addresses A0, A6, A8,
and/or AA.
1.6.12 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.
Figure 1-13 S3-3 Settings
Disables EEPROM
Enables EEPROM programming
programming
(factory configuration)
S3-3
1
ON
2
3
4
1
ON
2
3
4
Figure 1-14 VIO Keying Pin Settings
+3.3V key option on a PMC board +5V key option on a PMC board