PIC18LF2X_13 Datasheet, PDF (449/560 Pages) Microchip Technology – PIC18(L)F2X/45K50 USB Flash MCU Product Brief

PIC18(L)F2X/4XK22
27.11.3 TIMING DIAGRAMS AND SPECIFICATIONS
FIGURE 27-7:
EXTERNAL CLOCK TIMING (ALL MODES EXCEPT PLL)
Q4
Q1
Q2
Q3
Q4
Q1
OSC1
CLKOUT
1
3
3
4
4
2
TABLE 27-7: EXTERNAL CLOCK TIMING REQUIREMENTS
Param.
No.
Symbol
Characteristic
Min
Max Units
Conditions
1A
1
2
3
4
Note 1:
FOSC
External CLKIN
Frequency⁽¹⁾
Oscillator Frequency⁽¹⁾
DC
0.5
MHz EC, ECIO Oscillator mode (low power)
DC
16
MHz EC, ECIO Oscillator mode (medium power)
EC, ECIO Oscillator mode (high power)
DC
64
MHz
DC
4
MHz RC Oscillator mode
5
200
kHz LP Oscillator mode
0.1
4
MHz XT Oscillator mode
4
4
MHz HS Oscillator mode, VDD < 2.7V
4
16
MHz HS Oscillator mode, VDD 2.7V,
Medium-Power mode (HSMP)
TOSC
External CLKIN Period⁽¹⁾
Oscillator Period⁽¹⁾
4
20
MHz HS Oscillator mode, VDD 2.7V,
High-Power mode (HSHP)
2.0
—
62.5
—
15.6
—
s EC, ECIO Oscillator mode (low power)
ns EC, ECIO Oscillator mode (medium power)
EC, ECIO Oscillator mode (high power)
ns
250
—
ns RC Oscillator mode
5
200
s LP Oscillator mode
0.25
10
250
250
s XT Oscillator mode
ns HS Oscillator mode, VDD < 2.7V
62.5
250
ns HS Oscillator mode, VDD 2.7V,
Medium-Power mode (HSMP)
50
250
ns HS Oscillator mode, VDD 2.7V,
High-Power mode (HSHP)
TCY
Instruction Cycle Time⁽¹⁾
62.5
—
ns TCY = 4/FOSC
TOSL,
TOSH
External Clock in (OSC1)
High or Low Time
2.5
—
30
—
s LP Oscillator mode
ns XT Oscillator mode
10
—
ns HS Oscillator mode
TOSR,
External Clock in (OSC1)
—
50
ns LP Oscillator mode
TOSF
Rise or Fall Time
—
20
ns XT Oscillator mode
—
7.5
ns HS Oscillator mode
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 condi-
tions 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/CLKIN pin. When an external clock input is used, the “max.” cycle time limit is “DC” (no
clock) for all devices.
 2010-2012 Microchip Technology Inc.
DS41412F-page 449