PIC18F2423 MICROCHIP [Microchip Technology], PIC18F2423 Datasheet - Page 346

• Manufacturer Part Number: PIC18F2423
• Description: 28/40/44-Pin, Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2423/2523/4423/4523
26.4.3
FIGURE 26-5:
TABLE 26-6:
DS39755B-page 344
Param.
1A
1B
1C
1D
2
3
4
Note 1:
No.
OSC1
CLKO
F
F
T
Tosc
T
T
T
T
T
Symbol
CLKI
CY
OS
OS
OS
OS
CLKI
OSC
Instruction cycle period (T
except PLL. 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.
TIMING DIAGRAMS AND SPECIFICATIONS
L,
H
R,
F
EXTERNAL CLOCK TIMING REQUIREMENTS
Frequency
Period
Instruction Cycle Time
External Clock in (OSC1)
High or Low Time
External Clock in (OSC1) Rise or Fall Time
EXTERNAL CLOCK TIMING (ALL MODES EXCEPT PLL)
Q4
Characteristic
CY
) equals four times the input oscillator time base period for all configurations
Q1
1
(1)
CLKI External
Clock
Oscillator
CLKI External
Clock
Oscillator
Preliminary
Q2
2
1000
Min
100
250
100
100
DC
DC
DC
DC
DC
2.5
25
40
30
30
30
10
—
—
—
4
4
5
3
Q3
3
Max
250
250
7.5
40
25
10
33
10
33
20
50
—
—
—
—
—
—
—
—
—
—
1
4
Units
MHz EC, ECIO Oscillator mode
MHz XT Oscillator mode
MHz HS Oscillator mode
MHz HS + PLL Oscillator mode
MHz RC Oscillator mode
MHz HS + PLL Oscillator mode
kHz
kHz
ns
ns
ns
μs
ns
ns
μs
ns
ns
μs
ns
ns
Q4
ns
ns
ns
4
© 2007 Microchip Technology Inc.
EC, ECIO Oscillator mode
HS Oscillator mode
RC Oscillator mode
HS Oscillator mode
LP Oscillator mode
LP Oscillator mode
XT Oscillator mode
HS + PLL Oscillator mode
HS + PLL Oscillator mode
LP Oscillator mode
T
XT Oscillator mode
LP Oscillator mode
XT Oscillator mode
LP Oscillator mode
HS Oscillator mode
LP Oscillator mode
CY
4
= 4/F
Conditions
OSC
Q1