MPC8272ADS Freescale Semiconductor, MPC8272ADS Datasheet - Page 25

• 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

2.2.1
The level of V
measured upon JP13, using a DVM or any other high-input impedance voltage measuring
device.
V
CCW increases V
down to range-low. LD27 provides visual indication for V
with the rise of V
2.2.2
After 1K cycles and negation of the power-on reset signal, the MPC8272 samples the seven
MODCK lines—the lower 3 on MODCK(1-3) and the upper four—MODCKH(0:3) field
to establish the multiplication factors of the CPM’s and core’s PLLs. The levels on
MODCK(1:3) lines are set using SW5 (see Figure 2-3), switches #6–#8. When an
individual switch is at the OFF position, its associated MODCK line is pulled-high (‘1’).
When at the ON position, the associated MODCK is pulled-down (‘0’). SW5 is shown in
Figure 2-3, while the various combinations for SW5 (#6 - #8) and their associated
MODCK(1:3) values are shown in Table 2-1.
DDL
level is factory-set at the mid-range, but may be changed using RP1. Rotating RP1
Setting the
Setting MODCK(1:3) for PLLs Multiplication
Factor—SW5 (#6–#8)
DDL
DDL
DDL
is tuned using RP1 and is in the range of 1.3 V to 1.7 V. V
. V
Chapter 2. Hardware Preparation and Installation
voltage up to range-high. Rotating it clockwise decreases V
HIGH
DDL
VDDL
Figure 2-2. V
changes Vs. RP1’s rotation direction is shown in Figure 2-2.
Supply Voltage Level
DDL
RP1
Trimmer
—
DDL
RP1
LOW
level. It illuminates brighter
Hardware Preparation
DDL
may be
DDL