Microchip Technology TDGL002 - chipKIT Uno32 Development Board TDGL002 TDGL002 Data Sheet
Product codes
TDGL002
PIC32MX3XX/4XX
DS61143H-page 162
© 2011 Microchip Technology Inc.
TABLE 29-17: EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature
(unless otherwise stated)
Operating temperature
-40°C
≤ T
A
≤ +85°C for Industrial
-40°C
≤ T
A
≤ +105°C for V-Temp
Param.
No.
Symbol
Characteristics
Min.
Typical
(1)
Max.
Units
Conditions
OS10
F
OSC
External CLKI Frequency
(External clocks allowed only
in EC and ECPLL modes)
(External clocks allowed only
in EC and ECPLL modes)
DC
4
—
—
—
50
(3)
50
(5)
MHz
MHz
MHz
EC (Note 5)
ECPLL
ECPLL
(Note 4)
OS11
Oscillator Crystal Frequency
3
—
10
MHz
XT
(Note 5)
OS12
4
—
10
MHz
XTPLL
(Notes 4, 5)
(Notes 4, 5)
OS13
10
—
25
MHz
HS
(Note 5)
OS14
10
—
25
MHz
HSPLL
(Notes 4, 5)
(Notes 4, 5)
OS15
32
32.768
100
kHz
S
OSC
(Note 5)
OS20
T
OSC
T
OSC
= 1/F
OSC
= T
CY
(2)
—
—
—
—
See parameter
OS10 for F
OS10 for F
OSC
value
OS30
T
OS
L,
T
OS
H
External Clock In (OSC1)
High or Low Time
High or Low Time
0.45 x T
OSC
—
—
ns
EC (Note 5)
OS31
T
OS
R,
T
OS
F
External Clock In (OSC1)
Rise or Fall Time
Rise or Fall Time
—
—
0.05 x T
OSC
ns
EC (Note 5)
OS40
T
OST
Oscillator Start-up Timer Period
(Only applies to HS, HSPLL,
XT, XTPLL and S
(Only applies to HS, HSPLL,
XT, XTPLL and S
OSC
Clock
Oscillator modes)
—
1024
—
T
OSC
(Note 5)
OS41
T
FSCM
Primary Clock Fail Safe
Time-out Period
Time-out Period
—
2
—
ms
(Note 5)
OS42
G
M
External Oscillator
Transconductance
Transconductance
—
12
—
mA/V
V
DD
= 3.3V
T
A
= +25°C
(Note 5)
Note 1:
Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are characterized but are
not tested.
not tested.
2:
Instruction cycle period (T
CY
) equals 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.
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.
3:
40 MHz maximum for PIC32MX320F032H and PIC32MX420F032H devices.
4:
PLL input requirements: 4 MH
Z
≤ F
PLLIN
≤ 5 MH
Z
(use PLL prescaler to reduce F
OSC
). This parameter is
characterized, but tested at 10 MHz only at manufacturing.
5:
This parameter is characterized, but not tested in manufacturing.