Datasheet

 2011 Microchip Technology Inc. DS39932D-page 487
PIC18F46J11 FAMILY
TABLE 29-9: EXTERNAL CLOCK TIMING REQUIREMENTS
TABLE 29-10: PLL CLOCK TIMING SPECIFICATIONS
TABLE 29-11: INTERNAL RC ACCURACY (INTOSC AND INTRC SOURCES)
Param.
No.
Symbol Characteristic Min Max Units Conditions
1A F
OSC External CLKI Frequency
(1)
DC 48 MHz EC Oscillator mode
4 12 ECPLL Oscillator mode
Oscillator Frequency
(1)
4 16 MHz HS Oscillator mode
4 12 HSPLL Oscillator mode
1TOSC External CLKI Period
(1)
20.8 — ns EC Oscillator mode
83.3 — ECPLL Oscillator mode
Oscillator Period
(1)
62.5 250 ns HS Oscillator mode
83.3 250 HSPLL Oscillator mode
2T
CY Instruction Cycle Time
(1)
83.3 DC ns TCY = 4/FOSC, Industrial
3TOSL,
T
OSH
External Clock in (OSC1)
High or Low Time
10 — ns EC Oscillator mode
4T
OSR,
T
OSF
External Clock in (OSC1)
Rise or Fall Time
— 7.5 ns EC Oscillator mode
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.
Param
No.
Sym Characteristic Min Typ† Max Units Conditions
F10 F
PLLIN PLL Input Frequency Range 4 — 12 MHz
F11 F
PLLO PLL Output Frequency (4x FPLLIN)16—48MHz
F12 t
rc
PLL Start-up Time (lock time) — — 2 ms
† Data in “Typ” column is at 3.3V, 25C, unless otherwise stated.
Param
No.
Device Min Typ Max Units Conditions
INTOSC Accuracy @ Freq = 8 MHz,
4 MHz, 2 MHz, 1 MHz, 500 kHz, 250 kHz, 125 kHz, 31 kHz
(1)
All Devices
-1 +/-0.15 +1 % 0°C to +85°C V
DD = 2.0-3.3V
-1 +/-0.25 +1 % -40°C to +85°C V
DD = 2.0-3.6V,
V
DDCORE = 2.0-2.7V
INTRC Accuracy @ Freq = 31 kHz
(1)
All Devices 20.3 — 42.2 kHz -40°C to +85°C VDD = 2.0-3.6V,
V
DDCORE = 2.0-2.7V
Note 1: The accuracy specification of the 31 kHz clock is determined by which source is providing it at a given time.
When INTSRC (OSCTUNE<7>) is ‘1’, use the INTOSC accuracy specification. When INTSRC is ‘0’, use
the INTRC accuracy specification.