PIC32MX1XX_12 Datasheet, PDF (255/328 Pages) Microchip Technology – 32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

PIC32MX1XX/2XX
TABLE 29-16: PLL CLOCK TIMING SPECIFICATIONS
AC CHARACTERISTICS
Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +105°C for V-temp
Param.
No.
Symbol
Characteristics⁽¹⁾
Min. Typical Max. Units
Conditions
OS50 FPLLI
PLL Voltage Controlled
Oscillator (VCO) Input
Frequency Range
3.92
—
5 MHz ECPLL, HSPLL, XTPLL,
FRCPLL modes
OS51 FSYS On-Chip VCO System
60
—
120 MHz
—
Frequency
OS52 TLOCK PLL Start-up Time (Lock Time) —
—
2
ms
—
OS53 DCLK CLKO Stability⁽²⁾
-0.25
—
+0.25 % Measured over 100 ms
(Period Jitter or Cumulative)
period
Note 1: These parameters are characterized, but not tested in manufacturing.
2: This jitter specification is based on clock-cycle by clock-cycle measurements. To get the effective jitter for
individual time-bases on communication clocks, use the following formula:
EffectiveJitter = -------------------------^D----^C----^L---^K--------------------------
------------------^S----^Y---^S----^C----^L----^K--------------------
CommunicationClock
For example, if SYSCLK = 40 MHz and SPI bit rate = 20 MHz, the effective jitter is as follows:
EffectiveJitter = ^D-----^C----^L--^K-- = ^D-----^C----^L--^K--
4---0--
1.41
20
TABLE 29-17: INTERNAL FRC ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature
-40°C  TA  +85°C for Industrial
-40°C  TA  +105°C for V-temp
Param.
No.
Characteristics
Min. Typical Max. Units
Conditions
Internal FRC Accuracy @ 8.00 MHz⁽¹⁾
F20b FRC
-0.9
—
+0.9
%
—
Note 1: Frequency calibrated at 25°C and 3.3V. The TUN bits can be used to compensate for temperature drift.
TABLE 29-18: INTERNAL LPRC ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +105°C for V-temp
Param.
No.
Characteristics
Min. Typical Max. Units
Conditions
LPRC @ 31.25 kHz⁽¹⁾
F21 LPRC
-15
—
+15
%
—
Note 1: Change of LPRC frequency as VDD changes.
 2011-2012 Microchip Technology Inc.
Preliminary
DS61168E-page 255