PIC18F6520-IPT View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
PIC18F6520-IPT
Microchip Technology
PIC18F6520-IPT Datasheet PDF : 380 Pages
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PIC18F6520/8520/6620/8620/6720/8720
26.4.3 TIMING DIAGRAMS AND SPECIFICATIONS
FIGURE 26-7:
EXTERNAL CLOCK TIMING (ALL MODES EXCEPT PLL)
Q4
Q1
Q2
Q3
Q4
Q1
OSC1
CLKO
1
3
3
4
4
2
TABLE 26-6: EXTERNAL CLOCK TIMING REQUIREMENTS
Param
No.
Symbol
Characteristic
Min
Max
Units
Conditions
1A
FOSC
External CLKI Frequency(1)
DC
25
MHz EC, ECIO, PIC18FX620/X720
(-40°C to +85°C)
DC
40
MHz EC, ECIO, PIC18FX520
(-40°C to +85°C)
Oscillator Frequency(1)
DC
25
MHz EC, ECIO, PIC18FX520 using external
memory interface (-40°C to +85°C)
DC
4
MHz RC oscillator
0.1
4
MHz XT oscillator
4
25
MHz HS oscillator
4
10
MHz HS + PLL oscillator, PIC18FX520
6
6.25
MHz HS + PLL oscillator, PIC18FX520 using
external memory interface
4
6.25
MHz HS + PLL oscillator, PIC18FX620/X720
1
TOSC
External CLKI Period(1)
5
200
kHz LP Oscillator mode
25
—
ns EC, ECIO, PIC18FX620/X720
(-40°C to +85°C)
Oscillator Period(1)
160
—
ns EC, ECIO, PIC18FX520
(-40°C to +85°C)
250
—
ns RC oscillator
250
10,000
ns XT oscillator
25
250
ns HS oscillator
100
250
ns HS + PLL oscillator, PIC18FX520
100
160
ns HS + PLL oscillator, PIC18FX620/X720
2
TCY
Instruction Cycle Time(1)
25
—
s LP oscillator
100
—
ns
TCY = 4/FOSC
3
TOSL,
External Clock in (OSC1)
TOSH
High or Low Time
30
—
ns XT oscillator
2.5
—
s LP oscillator
10
—
ns HS oscillator
4
TOSR,
External Clock in (OSC1) Rise
—
TOSF
or Fall Time
—
20
ns XT oscillator
50
ns LP oscillator
—
7.5
ns HS oscillator
Note 1:
Instruction cycle period (TCY) equals four times the input oscillator time base period for all configurations 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.
DS39609C-page 320
2003-2013 Microchip Technology Inc.
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