Datasheet

dsPIC33FJ16(GP/MC)101/102 AND dsPIC33FJ32(GP/MC)101/102/104
DS70652E-page 294  2011-2012 Microchip Technology Inc.
TABLE 26-17: PLL CLOCK TIMING SPECIFICATIONS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  T
A  +125°C for Extended
Param
No.
Symbol Characteristic Min Typ
(1)
Max Units Conditions
OS50 FPLLI PLL Voltage Controlled
Oscillator (VCO) Input
Frequency Range
(2)
3.0 — 8 MHz ECPLL and MSPLL
modes
OS51 FSYS On-Chip VCO System
Frequency
(3)
12 — 32 MHz
OS52 TLOCK PLL Start-up Time (Lock Time)
(3)
—— 2mS
OS53 D
CLK CLKO Stability (Jitter)
(3)
-2 1 +2 %
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
2: These parameters are characterized by similarity, but are tested in manufacturing at 7.7 MHz input only.
3: These parameters are characterized by similarity, but are not tested in manufacturing. This specification is
based on clock cycle by clock cycle measurements. The effective jitter for individual time bases, or communi-
cation clocks used by the user application, are derived from dividing the CLKO stability specification by the
square root of “N” (where “N” is equal to F
OSC, divided by the peripheral data rate clock). For example, if
F
OSC = 32 MHz and the SPI bit rate is 5 MHz, the effective jitter of the SPI clock is equal to:
TABLE 26-18: AC CHARACTERISTICS: INTERNAL FAST RC (FRC) ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  T
A  +125°C for Extended
Param
No.
Characteristic Min Typ Max Units Conditions
Internal FRC Accuracy @ 7.3728 MHz
(1)
F20a FRC -1.5 ±0.25 +1.5 % -40°C  TA -10°C
F20b FRC -1 ±0.25 +1 % -10°C  T
A +85°C
F20c FRC -2 ±0.25 +2 % +125°C
Note 1: Frequency is calibrated at +25°C and 3.3V. TUNx bits may be used to compensate for temperature drift.
DCLK
32
5
------
--------------
2%
2.53
---------- 0 . 7 9 %==
TABLE 26-19: INTERNAL LOW-POWER RC (LPRC) ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  T
A  +125°C for Extended
Param
No.
Characteristic Min Typ Max Units Conditions
LPRC @ 32.768 kHz
(1,2)
F21a LPRC -20 ±10 +20 % -40°C  TA +85°C
F21b LPRC -30 ±10 +30 % -40°C  T
A +125°C
Note 1: Change of LPRC frequency as V
DD changes.
2: LPRC accuracy impacts the Watchdog Timer Time-out Period (T
WDT1). See Section 23.4 “Watchdog
Timer (WDT)” for more information.