MPC8272ADS Freescale Semiconductor, MPC8272ADS Datasheet - Page 29

• Manufacturer Part Number: MPC8272ADS
• Description: KIT DEVELOPMENT MPC8272
• Manufacturer: Freescale Semiconductor
• Type: MPUr

Specifications of MPC8272ADS

• Contents: Board
• For Use With/related Products: MPC8272
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.2.8
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).
.
2.2.9
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).
Clock-In Source Selection
FCC1 Ethernet Port Mode—MII/RMII
To cause a mode change, set JP5 while the board is
powered-off.
External Clock
1
1
Factory Setup
Figure 2-7. FCC1 Ethernet Mode Selection
Chapter 2. Hardware Preparation and Installation
MII Mode
Figure 2-6. Clock Source Selection
JP1
JP5
2
2
3
3
NOTE
On-board Clock Oscillator
1
1
Factory Setup
RMII Mode
JP1
JP5
2
2
Hardware Preparation
3
3