PIC18F2331 MICROCHIP [Microchip Technology], PIC18F2331 Datasheet - Page 357

• Manufacturer Part Number: PIC18F2331
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

25.4.3
FIGURE 25-5:
TABLE 25-4:
 2003 Microchip Technology Inc.
1A
1
2
3
4
Note 1:
Param.
No.
OSC1
CLKO
F
T
T
TosL,
TosH
TosR,
TosF
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
OSC
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)
PIC18F2331/2431/4331/4431
(1)
Preliminary
Q2
Min
250
250
100
100
DC
DC
0.1
2.5
25
25
25
30
10
—
—
—
4
4
5
2
3
10,000
Max
200
250
250
7.5
40
25
10
20
50
—
—
—
—
—
—
—
Q3
4
4
3
Units
MHz
MHz
MHz
MHz
MHz
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
Q4
4
EC, ECIO
RC osc
XT osc
HS osc
HS + PLL osc
LP Osc mode
EC, ECIO
RC osc
XT osc
HS osc
HS + PLL osc
LP osc
T
XT osc
LP osc
HS osc
XT osc
LP osc
HS osc
CY
= 4/F
4
OSC
Conditions
DS39616B-page 355
Q1