2.3
CPU Speed Se lec tion
The LBC- Plus uses a Crys tal con trolled fre quency syn the sizer to con trol the CPU clock rate. The
jumper block at J12 al lows for the se lec tion of any of 8 CPU base clock fre quen cies rang ing from 8
MHz to 100 MHz.
The ta ble be low gives all of the pos si ble CPU clock speeds avail able by jump er ing J12.
CPU
Speed
J12
1-2
J12
3-4
J12
5-6
8 Mhz
ON
ON
ON
16 MHz
ON
ON
OFF
33 MHz
ON
OFF
ON
40 MHz
ON
OFF
OFF
50 MHz
OFF
ON
ON
66 MHz
OFF
ON
OFF
80 MHz
OFF
OFF
ON
100 MHz
OFF
OFF
OFF
NOTE : The LBC- Plus board will be jumpered at the fac tory for the rated speed of the in stalled
proc es sor. Jump er ing J12 to any speed in ex cess of the rated speed may re sult in CPU over heat ing,
misop era tion, and pos si ble de struc tion of the CPU. Fail ures of CPUs which have been op er ated above
their rated speed or tem pera ture are not cov ered un der the Win Sys tems stan dard prod uct war ranty.
Page 2 - 2
OPERATIONS MANUAL LBC-Plus
991206
WinSystems - "The Embedded Systems Authority"
1 o
2 o
3 o
1 o
2 o
3 o
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J31
J12
J14
1 2 3
o o o
J36
