Datasheet

© 2009-2012 Microchip Technology Inc. Preliminary DS70616F-page 509
dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
TABLE 32-17: 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. Symbol Characteristic Min. Typ.
(1)
Max. Units Conditions
OS50 F
PLLI PLL Voltage Controlled
Oscillator (VCO) Input
Frequency Range
0.8 — 8.0 MHz ECPLL, XTPLL modes
OS51 F
SYS On-Chip VCO System
Frequency
120 — 340 MHz —
OS52 TLOCK PLL Start-up Time (Lock Time) 0.9 1.5 3.1 mS —
OS53 D
CLK CLKO Stability (Jitter)
(2)
-5 0.5 5 % —
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: This jitter specification is based on clock cycle-by-clock cycle measurements. To get the effective jitter for
individual time bases or communication clocks used by the application, use the following formula:
For example, if F
OSC = 120 MHz and the SPI bit rate = 10 MHz, the effective jitter is as follows:
Effective Jitter
DCLK
FOSC
Time Base or Communication Clock
---------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------=
Effective Jitter
DCLK
120
10
---------
--------------
D
CLK
12
--------------
D
CLK
3.464
--------------===
TABLE 32-18: AUXILIARY PLL CLOCK TIMING SPECIFICATIONS
(dsPIC33EPXXXMU8XX AND PIC24EPXXXGU8XX DEVICES ONLY)
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. Symbol Characteristic Min. Typ.
(1)
Max. Units Conditions
OS54 AF
PLLI PLL Voltage Controlled
Oscillator (VCO) Input
Frequency Range
3 — 5.5 MHz ECPLL, XTPLL modes
OS55 AFSYS On-Chip VCO System
Frequency
60 — 120 MHz —
OS56 AT
LOCK PLL Start-up Time (Lock Time) 0.9 1.5 3.1 mS —
OS57 AD
CLK CLKO Stability (Jitter) -2 0.25 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.