PXR40 datasheet(72/100 Pages) FREESCALE

72 / 100 page

PXR40 Microcontroller Data Sheet, Rev. 1

Electrical characteristics

Freescale Semiconductor

Table 24. PFCPR1 settings vs. frequency of operation1

1 Illegal combinations exist. Use entries from the same row in this table.

Spec

Clock

Mode

Maximum Frequency2

(MHz)

2 This is the nominal maximum frequency of operation: platform runs at f

sys/2 in Enhanced Mode .

APC =

RWSC

WWSC

DPFEN3

3 For maximum flash performance, set to 0b1.

IPFEN3

PFLIM4

4 For maximum flash performance, set to 0b10.

BFEN5

5 For maximum flash performance, set to 0b1.

Core

fsys

Platform

fplatf

Enhanced

264 MHz6

6 This is the nominal maximum frequency of operation in Enhanced Mode. Max speed is the maximum speed

allowed including frequency modulation (FM). 270 MHz parts allow for 264 MHz system core clock(fsys)+2% FM

and 132 Mhz platform clock (fplatf)+ 2% FM.

132 MHz6

0b011

0b01

0b0

0b1

0b0

0b1

0b00

0b01

0b1x

0b0

0b1

Enhanced/

Full

200 MHz

100 MHz

0b010

0b01

0b0

0b1

0b0

0b1

0b00

0b01

0b1x

0b0

0b1

Legacy

132 MHz

0b100

0b01

0b0

0b1

0b0

0b1

0b00

0b01

0b1x

0b0

0b1

Default setting after reset:

0b111

0b11

0b00

0b0

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