Datasheet

dsPIC33FJ32GP202/204 and dsPIC33FJ16GP304
DS70290J-page 222 © 2007-2011 Microchip Technology Inc.
TABLE 22-17: PLL CLOCK TIMING SPECIFICATIONS (VDD = 3.0V TO 3.6V)
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +125°C for Extended
Param
No.
Symbol Characteristic Min Typ
(1)
Max Units Conditions
OS50 F
PLLI PLL Voltage Controlled
Oscillator (VCO) Input
Frequency Range
(2)
0.8 — 8 MHz ECPLL, XTPLL modes
OS51 F
SYS On-Chip VCO System
Frequency
(3)
100 — 200 MHz —
OS52 T
LOCK PLL Start-up Time (Lock Time)
(3)
0.9 1.5 3.1 ms —
OS53 DCLK CLKO Stability (Jitter)
(3)
-3 0.5 3 % Measured over 100 ms
period
Note 1: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.
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. To calculate the effective jitter for individual time bases
or communication clocks use this formula:
Peripheral Clock Jitter
DCLK
FOSC
Peripheral Bit Rate Clock
--------------------------------------------------------------
⎝⎠
⎛⎞
------------------------------------------------------------------------=
For example: Fosc = 32 MHz, DCLK = 3%, SPI bit rate clock, (i.e., SCK) is 2 MHz.
SPI SCK Jitter
D
CLK
32 MHz
2 MHz
--------------------
⎝⎠
⎛⎞
------------------------------
3%
16
----------
3%
4
--------
0.75%====
TABLE 22-18: AC CHARACTERISTICS: INTERNAL RC 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 ≤ TA ≤ +125°C for Extended
Param
No.
Characteristic Min Typ Max Units Conditions
Internal FRC Accuracy @ FRC Frequency = 7.37 MHz
(1)
F20a FRC -2 — +2 % -40°C ≤ TA ≤ +85°C VDD = 3.0-3.6V
F20b FRC -5 — +5 % -40°C ≤ T
A ≤ +125°C VDD = 3.0-3.6V
Note 1: Frequency calibrated at 25°C and 3.3V. TUN bits can be used to compensate for temperature drift.
TABLE 22-19: INTERNAL RC 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 -15 ±6 +15 % -40°C ≤ TA ≤ +85°C VDD = 3.0-3.6V
F21b LPRC -40 — +40 % -40°C ≤ T
A ≤ +125°C VDD = 3.0-3.6V
Note 1: Change of LPRC frequency as V
DD changes.
2: LPRC impacts the Watchdog Timer Time-out Period (T
WDT1). See Section 19.4 “Watchdog Timer
(WDT)” for more information.