Jumpers; Figure 9: Jumper Callouts; Table 6: Jumper Descriptions - Broadcom BCM91250A User Manual

User Manual
05/18/04
J
UMPERS
Figure 9 shows the positions of jumpers numerically. Compare
each jumper in
Board ID Function
J1 System Byte Order
J2 BCM1250
BootMode[1] bit
J3 BCM1250 plldiv[3]
J4 IOB0, IOB1 divide
ratios
J5 PLL bypass
Document 91250A-UM100-R
Table 6.

Figure 9: Jumper Callouts

Table 6: Jumper Descriptions

Settings
open = little endian
1-2 = big endian
open = 0 (generic bus boot ROM)
1-2 = 1 (SMBus boot ROM)
1-2 = 0
open = 1
Please see "Acceptable PLL
Settings" on page 21
open = IOB0 div4, IOB1 div3
1-2 = IOB0 div4, IOB1 div2
3-4 = IOB0 div3, IOB1 div3
1-2, 3-4 = IOB0 div3, IOB1 div2
open = normal PLL operation
B roadc om C or por ati on
Figure 9 number callouts with a description of
Default
big endian
generic bus boot ROM
set to speed bin of BCM1250
for more information.
dependent on speed bin of
BCM1250
normal PLL operation
BCM91250A

Jumpers

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