Owner manual

VM162/VM172Chapter 3 Conﬁguration

Juli 23, 1997 Page 3- 9© PEP Modular Computers

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

3.3.6 EEPROM Write Protection

The serial EEPROM stores important data, such as the PEP assigned Ethernet address. In order to pre-

vent overwriting, users may set the protection.

3.3.7 JTAG Chain

Jumper Setting Description

J4 Set 24 MHz connected to 68EN360 RCLK2 pin Default

Open 24 MHz disconnected from 68EN360 RCLK2 pin

Jumper Setting Description

J9 Set Serial EEPROM write protected

Open Serial EEPROM not write protected Default

Jumper Setting Description

J23 1-2 JTAG Chain, CPUs included

1-3 JTAG Chain, CPUs excluded Default