PIC18LF24K Datasheet, PDF (546/594 Pages) –

PIC18(L)F26/45/46K40
TABLE 37-7: EXTERNAL CLOCK/OSCILLATOR TIMING REQUIREMENTS (CONTINUED)
Standard Operating Conditions (unless otherwise stated)
Param
No.
Sym.
Characteristic
Min. Typ† Max. Units
Conditions
OS21 F_CY
Instruction Frequency
—
FOSC/4
—
MHz
OS22 T_CY
Instruction Period
62.5 1/F_CY
—
ns
* These parameters are characterized but not tested.
† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
Note 1: Instruction cycle period (TCY) equals four 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 OSC1 pin.
When an external clock input is used, the “max” cycle time limit is “DC” (no clock) for all devices.
2: The system clock frequency (FOSC) is selected by the “main clock switch controls” as described in Section 6.0 “Power-
Saving Operation Modes”.
3: The system clock frequency (FOSC) must meet the voltage requirements defined in the Section 37.2 “Standard
Operating Conditions”.
4: LP, XT and HS oscillator modes require an appropriate crystal or resonator to be connected to the device. For clocking
the device with the external square wave, one of the EC mode selections must be used.
 2016 Microchip Technology Inc.
Preliminary
DS40001816C-page 546