User`s guide

2.1 Configuration Jumpers
Table 2–1 Configuration Jumper Position Descriptions
Feature Jack/Jumper—Pins and Description
System clock
divisor
J1—1/2, —3/4, —5/6, —7/8 (eb164.4)
J1—1/2
(irq3)
J1—3/4
(irq2)
J1—5/6
(irq1)
J1—7/8
(irq0) Ratio
1
In In Out Out 3
In Out In In 4
In Out In Out 5
In Out Out In 6
In Out Out Out 7
Out In In In 8
Divisor 8 is used for 266 MHz (default).
Out In In Out 9
Divisor 9 is used for 300 MHz.
Out In Out In 10
Divisor 10 is used for 333 MHz.
Out In Out Out 11
Out Out In In 12
Out Out In Out 13
Out Out Out In 14
Out Out Out Out 15
1
The EB164 supports PCI bus speeds of 25 MHz to 33 MHz. Not all system clock ratios are
permissible at each CPU speed. The following CPU speed/ratio combinations are allowed:
CPU Speed
266.6 MHz
Ratios Allowed
8, 9, and 10
(continued on next page)
2–4 System Configuration and Connectors