PIC24FJ64GA006-I Datasheet, PDF (228/258 Pages) Microchip Technology – 64/80/100-Pin, General Purpose, 16-Bit Flash Microcontrollers

PIC24FJ128GA010 FAMILY
FIGURE 27-3:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
Q4 Q1
Q2
Q3
Q4 Q1 Q2 Q3
OSC1
CLKO
OS20
OS25
OS40
OS30 OS30
OS31 OS31
OS41
TABLE 27-17: EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
Param
No.
Sym
Characteristic
Min
Typ⁽¹⁾
Max
Units
Conditions
OS10 FOSC External CLKI Frequency
DC
(external clocks allowed
3
only in EC mode)
—
32
MHz EC mode
—
8
MHz ECPLL mode
Oscillator Frequency
3.5
—
10
MHz XT mode
3.5
—
8
MHz XTPLL mode
10
—
32
MHz HS mode
31
—
33
kHz SOSC
OS20 TOSC TOSC = 1/FOSC
—
—
—
— See Parameter OS10
for FOSC value
OS25 TCY Instruction Cycle Time⁽²⁾
62.5
—
DC
ns
OS30 TosL, External Clock in (OSC1) 0.45 x TOSC
—
—
ns EC mode
TosH High or Low Time
OS31 TosR, External Clock in (OSC1)
—
TosF Rise or Fall Time
OS40 TckR CLKO Rise Time⁽³⁾
—
OS41 TckF CLKO Fall Time⁽³⁾
—
—
20
ns EC mode
6
10
ns
6
10
ns
Note 1:
2:
3:
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
Instruction cycle period (TCY) equals two times the input oscillator time base period. 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.
Measurements are taken in EC mode. The CLKO signal is measured on the OSC2 pin. CLKO is low for the
Q1-Q2 period (1/2 TCY) and high for the Q3-Q4 period (1/2 TCY).
DS39747F-page 228
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