PIC18C658 MICROCHIP [Microchip Technology], PIC18C658 Datasheet - Page 322

• Manufacturer Part Number: PIC18C658
• Description: High-Performance Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18CXX8
25.3.3
FIGURE 25-5: EXTERNAL CLOCK TIMING
TABLE 25-4:
DS30475A-page 322
1A
1
2
3
4
Note 1: Instruction cycle period (T
Param. No. Symbol
CLKOUT
OSC1
TIMING DIAGRAMS AND SPECIFICATIONS
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.
Fosc
Tosc
T
TosL,
TosH
TosR,
TosF
CY
EXTERNAL CLOCK TIMING REQUIREMENTS
Q4
External CLKIN
Frequency
Oscillator Frequency
External CLKIN Period
Oscillator Period
Instruction Cycle Time
External Clock in (OSC1)
High or Low Time
External Clock in (OSC1)
Rise or Fall Time
Characteristic
(1)
CY
) equals four times the input oscillator time-base period. All specified values are
Q1
(1)
1
Advanced Information
(1)
(1)
(1)
Q2
Min
250
100
250
250
100
100
DC
DC
DC
DC
DC
0.1
2.5
40
40
30
10
—
—
—
4
4
4
5
5
5
5
2
3
10,000
10,000
Max
200
100
Q3
7.5
40
40
10
40
40
25
10
20
50
—
—
—
—
—
—
—
—
—
—
—
4
4
3
Units
MHz XT osc
MHz HS osc
MHz HS + PLL osc
MHz
MHz RC osc
MHz XT osc
MHz HS osc
MHz HS + PLL osc
kHz
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
s
Q4
4
LP osc
EC
LP osc mode
XT and RC osc
HS osc
HS + PLL osc
LP osc
EC
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
2000 Microchip Technology Inc.
= 4/F
4
OSC
Conditions
Q1