PIC18F2221 MICROCHIP [Microchip Technology], PIC18F2221 Datasheet - Page 349

• Manufacturer Part Number: PIC18F2221
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

26.4.3
FIGURE 26-6:
TABLE 26-6:
© 2007 Microchip Technology Inc.
1A
1
2
3
4
Note 1:
Param.
No.
OSC1
CLKO
F
T
T
T
T
T
T
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
Symbol
OSC
CY
OS
OS
OS
OS
OSC
L,
H
R,
F
EXTERNAL CLOCK TIMING REQUIREMENTS
EXTERNAL CLOCK TIMING (ALL MODES EXCEPT PLL)
External CLKI Frequency
Oscillator Frequency
External CLKI Period
Oscillator Period
Instruction Cycle Time
External Clock in (OSC1)
High or Low Time
External Clock in (OSC1)
Rise or Fall Time
Q4
Characteristic
CY
(1)
) equals four times the input oscillator time base period for all configurations
Q1
1
(1)
(1)
(1)
(1)
Preliminary
1000
Q2
Min
250
100
160
DC
DC
DC
DC
0.1
2.5
40
32
30
10
—
—
—
—
—
—
4
5
2
PIC18F4321 FAMILY
3
Max
200
7.5
25
50
25
40
20
20
50
—
—
—
—
—
—
—
—
—
1
4
4
1
Q3
3
Units
MHz
MHz
MHz
MHz
MHz
kHz
kHz
ns
ns
μs
ns
μs
ns
μs
ns
ns
ns
μs
ns
ns
ns
ns
Q4
4
XT, RC Oscillator mode
HS Oscillator mode
LP Oscillator mode
RC Oscillator mode
XT Oscillator mode
HS Oscillator mode
LP Oscillator mode
XT, RC Oscillator mode
HS Oscillator mode
LP Oscillator mode
RC Oscillator mode
XT Oscillator mode
HS Oscillator mode
LP Oscillator mode
T
T
XT Oscillator mode
LP Oscillator mode
HS Oscillator mode
XT Oscillator mode
LP Oscillator mode
HS Oscillator mode
CY
CY
= 4/F
= 4/F
4
OSC
OSC
Conditions
, Industrial
, Extended
DS39689E-page 347
Q1