PIC18F6585 Datasheet, PDF (430/496 Pages) Microchip Technology – 64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module

PIC18F6585/8585/6680/8680
27.4.3 TIMING DIAGRAMS AND SPECIFICATIONS
FIGURE 27-6:
EXTERNAL CLOCK TIMING (ALL MODES EXCEPT PLL)
Q4
Q1
Q2
Q3
Q4
Q1
OSC1
CLKO
1
3
3
4
4
2
TABLE 27-6: EXTERNAL CLOCK TIMING REQUIREMENTS
Param.
No.
Symbol
Characteristic
Min Max Units
Conditions
1A
FOSC
External CLKI Frequency⁽¹⁾ DC
40 MHz EC, ECIO, -40°C to +85°C
Oscillator Frequency⁽¹⁾
DC
25 MHz EC,ECIO, -40°C to +85°C, EMA
DC
25 MHz EC, ECIO, +85°C to +125°C
DC
16 MHz EC, ECIO, +85°C to +125°C, EMA
DC
4 MHz RC oscillator
0.1
4 MHz XT oscillator
4
25 MHz HS oscillator, -40°C to +85°C
4
25 MHz HS oscillator, -40°C to +85°C, EMA
4
25 MHz HS oscillator, +85°C to +125°C
4
16 MHz HS oscillator, +85°C to +125°C, EMA
1
TOSC
External CLKI Period⁽¹⁾
Oscillator Period⁽¹⁾
4
10 MHz HS + PLL oscillator, -40°C to +85°C
4
6.25 MHz HS + PLL oscillator, +85°C to +125°C
DC 200 kHz LP oscillator
25
—
ns EC, ECIO, -40°C to +85°C
40
—
ns EC,ECIO, -40°C to +85°C, EMA
40
—
ns EC, ECIO, +85°C to +125°C
62.5
—
ns EC, ECIO, +85°C to +125°C, EMA
250
—
ns RC oscillator
250 10,000 ns XT oscillator
40
—
ns HS oscillator, -40°C to +85°C
40
—
ns HS oscillator, -40°C to +85°C, EMA
40
—
ns HS oscillator, +85°C to +125°C
62.5
—
ns HS oscillator, +85°C to +125°C, EMA
100 250 ns HS + PLL oscillator, -40°C to +85°C
160 250 ns HS + PLL oscillator, +85°C to +125°C
5
200 µs LP oscillator
2
TCY
Instruction Cycle Time⁽¹⁾
100
—
ns TCY = 4/FOSC, -40°C to +85°C
160
—
ns TCY = 4/FOSC, +85°C to +125°C
3
TOSL,
External Clock in (OSC1)
30
—
ns XT oscillator
TOSH
High or Low Time
2.5
—
µs LP oscillator
10
—
ns HS oscillator
4
TOSR, External Clock in (OSC1)
—
20
ns XT oscillator
TOSF
Rise or Fall Time
—
50
ns LP oscillator
—
7.5
ns HS oscillator
Note 1: Instruction cycle period (TCY) equals four times the input oscillator time base period for all configurations
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.
DS30491C-page 428
 2004 Microchip Technology Inc.