Owner manual

VM162/VM172Chapter 3 Configuration
Juli 23, 1997 Page 3- 3© PEP Modular Computers
3.1 Default Jumper Settings
The VM162/VM172 has four wire jumpers which can be configured by the user. Additionally, the
VM162/VM172 has a set of solder jumpers which are factory set. The list of default settings are shown
below.
3.1.1 Jumper Default Settings (Component Side)
3.1.2 Jumper Default Settings (Solder Side)
Jumper
Default
Setting
Description
J1 Open Boot from VMEbus memory disabled
J2 Open Boot from boot ROM disabled
J10 Set On-board reset generator to VME
J11 Open Enhanced CXC mode disabled
J8
Open Protective ground disconnected from signal ground
(solder jumper)
Jumper
Default
Setting
Description
J3
Dependent on
board version
CPU type
J12-J15
Dependent on
board version
CPU power supply
J5-J7
Dependent on
board version
CPU clock speed
J4 Set 24 MHz Comm. Clock connected to 68EN360
J9 Open EEPROM write protection disabled
J16 1-3 SRAM data retention on
J17 Open BERR1 timeout 8µs not selected
J18 Open BERR1 timeout 32µs not selected
J19 and J20
Dependent on
board version
SRAM size
J21 Set BERR1 timeout 128µs selected
J22 Set VCB current test bridge