MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 165
MOD5234-100IR
Manufacturer Part Number
MOD5234-100IR
Description
MOD5234 10/100 ETHERNET MODULE
Manufacturer
NetBurner Inc
Type
Controllers & Processorsr
Datasheets
1.MOD5272-100IR.pdf
(3 pages)
2.MOD5234-100IR.pdf
(4 pages)
3.MOD5234-100IR.pdf
(754 pages)
Specifications of MOD5234-100IR
Interface
I²C, SPI, UART
Voltage - Supply
2.5V
Mounting Type
Surface Mount
Package / Case
Module
Product
Modules
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Format
-
Baud Rates
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
Q4483564
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7.4.6
In PLL mode, the PLL synthesizes the system clocks. The PLL can multiply the reference clock
frequency by 4x to 18x, provided that the system clock frequency remains within the range listed
in the electrical specifications. For example, if the reference frequency is 8 MHz, the PLL can
synthesize frequencies of 32 MHz to 144 MHz. In addition, the RFD can reduce the system
frequency by dividing the output of the PLL. The RFD is not in the feedback loop of the PLL, so
changing the RFD divisor does not affect PLL operation. Finally, the PLL can be frequency
modulated to reduce electromagnetic interference often associated with clock circuitry.
Figure 7-9
values. Actual component values depend on crystal specifications.
The following subsections describe each major block of the PLL. Refer to
these functional sub-blocks interact.
Freescale Semiconductor
PLL Operation
shows the external support circuitry for the crystal oscillator with example component
VSSPLL
C1
ON-CHIP
Figure 7-9. Crystal Oscillator Example
EXTAL
MCF5235 Reference Manual, Rev. 2
RF
XTAL
RS
VSSPLL
C2
8-MHz Crystal Configuration
C1 = C2 = 16 pF
RF ≥ 1 MΩ
RS = 470 Ω
Figure 7-10
Functional Description
to see how
7-21
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