Datasheet

© 2007-2012 Microchip Technology Inc. DS70292G-page 351
dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/X04, AND dsPIC33FJ128GPX02/X04
TABLE 30-17: 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 ≤T
A ≤+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
0.8 — 8 MHz ECPLL, HSPLL, XTPLL
modes
OS51 F
SYS On-Chip VCO System
Frequency
100 — 200 MHz —
OS52 T
LOCK PLL Start-up Time (Lock Time) 0.9 1.5 3.1 mS —
OS53 D
CLK CLKO Stability (Jitter)
(2)
-3 0.5 3 % Measured over 100 ms
period
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 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 30-18: 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 @ 7.3728 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 30-19: 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 ≤TA ≤+125°C for Extended
Param
No.
Characteristic Min Typ Max Units Conditions
LPRC @ 32.768 kHz
(1)
F21a LPRC -20 ±6 +20 % -40°C ≤ TA ≤ +85°C VDD = 3.0-3.6V
F21b LPRC -30 — +30 % -40°C ≤ T
A ≤ +125°C VDD = 3.0-3.6V
Note 1: Change of LPRC frequency as VDD changes.