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Chapter 3 Configuration VM162/VM172 Note: The above solder jumpers describe the basic configuration of the board. They are factory set and should not be altered by the user. Alteration of these jumpers can result in damage to the board. 3.3.5 Communications Clock Jumper Setting Description J4 Set 24 MHz connected to 68EN360 RCLK2 pin Open 24 MHz disconnected from 68EN360 RCLK2 pin Default 3.3.6 EEPROM Write Protection The serial EEPROM stores important data, such as the PEP assigned Ethernet address. In order to prevent overwriting, users may set the protection. Jumper Setting Description J9 Set Serial EEPROM write protected Open Serial EEPROM not write protected Jumper Setting Description J23 1-2 JTAG Chain, CPUs included 1-3 JTAG Chain, CPUs excluded Default 3.3.7 JTAG Chain Juli 23, 1997 © PEP Modular Computers Default Page 3- 9
