PIC18FXX39 Datasheet, PDF (270/322 Pages) Microchip Technology – Enhanced FLASH Microcontrollers with Single Phase Induction Motor Control Kernel

PIC18FXX39
23.3.3 TIMING DIAGRAMS AND SPECIFICATIONS
FIGURE 23-5:
EXTERNAL CLOCK TIMING (ALL MODES EXCEPT PLL)
Q4
Q1
Q2
Q3
Q4
Q1
OSC1
CLKO
1
3
3
4
4
2
TABLE 23-4: EXTERNAL CLOCK TIMING REQUIREMENTS
Param.
No.
Symbol
Characteristic
Min
Max Units
Conditions
1A
FOSC
External CLKI Frequency⁽¹⁾
DC
Oscillator Frequency⁽¹⁾
DC
40
MHz EC, ECIO, -40C to +85C
25
MHz EC, ECIO, +85C to +125C
4
25
MHz HS osc
4
10
MHz HS + PLL osc, -40C to +85C
4
6.25
MHz HS + PLL osc, +85C to +125C
1
TOSC
External CLKI Period⁽¹⁾
25
—
ns EC, ECIO, -40C to +85C
Oscillator Period⁽¹⁾
40
—
ns EC, ECIO, +85C to +125C
40
250
ns HS osc
100
250
ns HS + PLL osc, -40C to +85C
160
250
ns HS + PLL osc, +85C to +125C
2
TCY
Instruction Cycle Time⁽¹⁾
100
—
ns TCY = 4/FOSC, -40C to +85C
160
—
ns TCY = 4/FOSC, +85C to +125C
3
TosL,
External Clock in (OSC1)
10
TosH
High or Low Time
—
ns HS osc
4
TosR, External Clock in (OSC1)
—
7.5
ns HS osc
TosF
Rise or Fall Time
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.
TABLE 23-5: PLL CLOCK TIMING SPECIFICATIONS (VDD = 4.2 TO 5.5V)
Param
No.
Sym
Characteristic
Min
Typ†
Max Units Conditions
— FOSC Oscillator Frequency Range
4
—
10 MHz HS mode only
— FSYS On-Chip VCO System Frequency
16
—
40 MHz HS mode only
— t_rc PLL Start-up Time (Lock Time)
— CLK CLKO Stability (Jitter)
—
—
2
ms
-2
—
+2
%
† Data in “Typ” column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only
and are not tested.
DS30485B-page 270
Preliminary
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