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Hardware Preparation
2.2.8
Clock-In Source Selection
The main clock source can be selected between an external (off-board) source by
connecting to P6 or an on-board clock oscillator. The selection is done by setting JP1. When
a jumper is placed between positions 1–2 of JP1, the external clock source is enabled. When
a jumper is placed between positions 2–3 of JP1, the on-board clock oscillator is enabled
(see Figure 2-6).
.
JP1
1 2 3
External Clock
JP1
1 2 3
On-board Clock Oscillator
Factory Setup
Figure 2-6. Clock Source Selection
2.2.9
FCC1 Ethernet Port Mode—MII/RMII
The Ethernet PHY on FCC1 is set by default to 100Base-Tx full duplex and can be
configured to operate in MII or RMII interface. The selection is done by setting JP5. When
a jumper is placed between positions 1–2 of JP5, the MII interface is enabled. When a
jumper is placed between positions 2–3 of JP5, the RMII interface is enabled (see
Figure 2-7).
JP5
JP5
1
2 3
MII Mode
1
2 3
RMII Mode
Factory Setup
Figure 2-7. FCC1 Ethernet Mode Selection
NOTE
To cause a mode change, set JP5 while the board is
powered-off.
Chapter 2. Hardware Preparation and Installation
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