MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 158

• Manufacturer Part Number: MOD5234-100IR
• Description: MOD5234 10/100 ETHERNET MODULE
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

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

Clock Module
7.4.2
In external clock mode, the system is static and does not recognize reset until clocks are applied
to EXTAL and XTAL.
In PLL mode, the PLL operates in self-clocked mode (SCM) during reset until the input reference
clock to the PLL begins operating within the limits given in the electrical specifications.
If a PLL failure causes a reset, the system enters reset using the reference clock. Then the system
clock source changes to the PLL operating in SCM. If SCM is not functional, the system becomes
static. Alternately, if the LOCEN bit in SYNCR is cleared when the PLL fails, the system becomes
static. If external reset is asserted, the system cannot enter reset unless the PLL is capable of
operating in SCM.
7.4.2.1
When a POR is detected, the PLL registers will be initialized to their default state. The PLL will
not begin operating until the VDDPLL POR signal has negated. At this point, the PLL will begin
operating in SCM until a valid reference clock becomes present as indicated by the loss-of-clock
circuit. Refer to
7-14
1
Normal PLL clock mode
1:1 PLL clock mode
External clock mode
f
f
MFD ranges from 0 to 7
RFD ranges from 0 to 7
f
∆F
ref
sys/2
ref
System Clock Mode
Clock Operation During Reset
m
= input reference frequency
in external clock mode must not exceed 150MHz
Power-On Reset (POR)
= CLKOUT frequency
=
f
sys/2
Section 10.4.1.1, “Power-On
×
k
where k = 2±0.6, 4±0.6, or 6±0.6%.
Table 7-8. Clock Out and Clock In Relationships
f
- without frequency modulation
enabled:
- with frequency modulation:
f
sys/2
sys/2
f
f
sys
sys
= 2 × f
= f
MCF5235 Reference Manual, Rev. 2
=
=
ref
2f
------------------------------------------ -
PLL Options
f
-------------------------------------------------------- -
ref
ref
ref_1:1
× MFD
× MFD
(
2
(
RFD
2
RFD
+
Reset,” for more information.
+
2
1
2
) ∆F
)
±
m
Section 7.1.3.1, “Normal PLL Mode with
Crystal Reference”
“Normal PLL Mode with External Reference”
Section 7.1.3.3, “1:1 PLL Mode”
Section 7.1.3.4, “External Clock Mode
(Bypass Mode)”
Cross-Reference
and
Section 7.1.3.2,
Freescale Semiconductor