PIC18F25J50 MICROCHIP [Microchip Technology], PIC18F25J50 Datasheet - Page 510
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PIC18F25J50
Manufacturer Part Number
PIC18F25J50
Description
28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F25J50.pdf
(562 pages)
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PIC18F46J50 FAMILY
30.4.3
FIGURE 30-5:
TABLE 30-10: EXTERNAL CLOCK TIMING REQUIREMENTS
DS39931D-page 510
1A
1
2
3
4
Note 1:
Param.
No.
OSC1
CLKO
2:
3:
4:
F
T
T
T
T
T
T
Symbol
OSC
CY
OS
OS
OS
OS
OSC
The instruction cycle period (T
tions except PLL. All specified values are based on characterization data for that particular oscillator type
under standard operating conditions, with the device executing code. Exceeding these specified limits may
result in an unstable oscillator operation and/or higher than expected current consumption. All devices are
tested to operate at “min.” values with an external clock applied to the OSC1/CLKI pin. When an external
clock input is used, the “max.” cycle time limit is “DC” (no clock) for all devices.
In order to use the PLL, the external clock frequency must be either 4, 8, 12, 16, 20, 24, 40 or 48 MHz.
In order to use the PLL, the crystal/resonator must produce a frequency of either 4, 8, 12 or 16 MHz.
This is the maximum crystal/resonator driver frequency. The internal F
the PLL can be up to 48 MHz.
TIMING DIAGRAMS AND SPECIFICATIONS
L,
H
R,
F
External CLKI Frequency
Oscillator Frequency
External CLKI Period
Oscillator Period
Instruction Cycle Time
External Clock in (OSC1)
High or Low Time
External Clock in (OSC1)
Rise or Fall Time
EXTERNAL CLOCK TIMING
Q4
Characteristic
(1)
Q1
1
CY
(1)
(1)
(1)
) equals four times the input oscillator time base period for all configura-
(1)
62.5
20.8
20.8
62.5
83.3
Min
DC
DC
10
—
4
4
Q2
(4)
2
16
Max
250
250
DC
3
7.5
48
48
16
—
—
—
(4)
Q3
3
Units
MHz
MHz
ns
ns
ns
ns
ns
OSC
EC Oscillator mode
ECPLL Oscillator mode
HS Oscillator mode
HSPLL Oscillator mode
EC Oscillator mode
ECPLL Oscillator mode
HS Oscillator mode
HSPLL Oscillator mode
T
EC Oscillator mode
EC Oscillator mode
Q4
CY
4
frequency when running from
2011 Microchip Technology Inc.
= 4/F
4
OSC
Conditions
, Industrial
Q1
(2)
(3)
(2)
(3)
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