Datasheet

 2009-2012 Microchip Technology Inc. DS70591E-page 417
dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610
28.2 AC Characteristics and Timing Parameters
This section defines the dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610 AC characteristics
and timing parameters for 50 MIPS devices.
TABLE 28-5: EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C  T
A  +85°C for Industrial
Param
No.
Symb Characteristic Min Typ
(1)
Max Units Conditions
MOS10 FIN External CLKI Frequency
(External clocks allowed only
in EC and ECPLL modes)
DC — 50 MHz EC
Oscillator Crystal Frequency 3.5
—
10
—
—
—
10
33
50
MHz
kHz
MHz
XT
SOSC
HS
MOS20 TOSC TOSC = 1/FOSC 10 — DC ns
MOS25 T
CY Instruction Cycle Time
(2)
20 — DC ns
MOS30 TosL,
Tos H
External Clock in (OSC1)
High or Low Time
0.375 x T
OSC — 0.625 x TOSC ns EC
MOS31 TosR,
Tos F
External Clock in (OSC1)
Rise or Fall Time
——20nsEC
MOS40 TckR CLKO Rise Time
(3)
—5.2—ns
MOS41 TckF CLKO Fall Time
(3)
—5.2—ns
MOS41 G
M External Oscillator
Transconductance
14 16 18 mA/V VDD = 3.3V,
TA = +25ºC
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated.
2: Instruction cycle period (TCY) equals two times the input oscillator time base period. All specified values
are based on characterization data for that particular oscillator type under standard operating conditions
with the device executing code. Exceeding these specified limits may result in an unstable oscillator
operation and/or higher than expected current consumption. All devices are tested to operate at “min.”
values with an external clock applied to the OSC1/CLKI pin. When an external clock input is used, the
“max.” cycle time limit is “DC” (no clock) for all devices.
3: Measurements are taken in EC mode. The CLKO signal is measured on the OSC2 pin.