Microchip Technology MA330026 데이터 시트
dsPIC33FJ16(GP/MC)101/102 AND dsPIC33FJ32(GP/MC)101/102/104
DS70000652F-page 296
2011-2014 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
Operating temperature
-40°C
T
A
+85°C for Industrial
-40°C
T
A
+125°C for Extended
Param
No.
Symbol
Characteristic
Min
Typ
(
Max
Units
Conditions
OS50
F
PLLI
PLL Voltage Controlled Oscillator
(VCO) Input Frequency Range
(VCO) Input Frequency Range
3.0
—
8
MHz
ECPLL and MSPLL modes
OS51
F
SYS
On-Chip VCO System
Frequency
Frequency
12
—
32
MHz
OS52
T
LOCK
PLL Start-up Time (Lock Time)
(
)
—
—
2
mS
OS53
D
CLK
CLKO Stability (Jitter)
)
-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.
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
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:
D
CLK
32
5
------
--------------
2%
2.53
----------
0.79%
=
=
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
Operating temperature
-40°C
T
A
+85°C for Industrial
-40°C
T
A
+125°C for Extended
Param
No.
Characteristic
Min
Typ
Max
Units
Conditions
Internal FRC Accuracy @ 7.37 MHz
(
F20a
FRC
-2
±0.25
+2
%
-40°C
T
A
-10°C
V
DD
3.0-3.6V
F20b
FRC
-1
±0.25
+1
%
-10°C
T
A
+85°C
V
DD
3.0-3.6V
F20c
FRC
-5
±0.25
+5
%
+85°C
T
A
+125°C
V
DD
3.0-3.6V
Note 1:
Frequency is calibrated at +25°C and 3.3V. TUNx bits may be used to compensate for temperature drift.
TABLE 26-19: INTERNAL LOW-POWER RC (LPRC) ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature
Operating temperature
-40°C
T
A
+85°C for Industrial
-40°C
T
A
+125°C for Extended
Param
No.
Characteristic
Min
Typ
Max
Units
Conditions
LPRC @ 32.768 kHz
(
F21a
LPRC
-30
±10
+20
%
-40°C
T
A
-10°C
V
DD
3.0-3.6V
F21b
LPRC
-20
±10
+30
%
-10°C
T
A
+85°C
V
DD
3.0-3.6V
F21c
LPRC
-35
±10
+35
%
+85°C
T
A
+125°C
V
DD
3.0-3.6V
Note 1:
Change of LPRC frequency as V
DD
changes.
2:
LPRC accuracy impacts the Watchdog Timer Time-out Period (T
WDT
for more information.