PIC16F747 Microchip Technology Inc., PIC16F747 Datasheet - Page 225

• Manufacturer Part Number: PIC16F747
• Description: 28/40/44-pin, 8-bit Cmos Flash Microcontrollers With 10-bit A/d And Nanowatt Technology
• Manufacturer: Microchip Technology Inc.

FIGURE 18-5:
TABLE 18-4:
 2004 Microchip Technology Inc.
1
2
3
4
Note 1:
Param
No.
OSC1
CLKO
† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance
F
T
T
T
T
T
T
Symbol
OSC
CY
OS
OS
OS
OS
OSC
only and are not tested.
Instruction cycle period (T
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.
L,
H
R,
F
EXTERNAL CLOCK TIMING REQUIREMENTS
External CLKI Frequency
(Note 1)
Oscillator Frequency
(Note 1)
External CLKI Period
(Note 1)
Oscillator Period
(Note 1)
Instruction Cycle Time
(Note 1)
External Clock in (OSC1)
High or Low Time
External Clock in (OSC1)
Rise or Fall Time
EXTERNAL CLOCK TIMING
Q4
Characteristic
CY
Q1
) equals four times the input oscillator time base period. All specified values are
1
Q2
1000
Min
250
250
200
500
DC
DC
DC
DC
0.1
2.5
50
50
15
—
—
—
4
5
5
5
2
Typ†
3
T
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
CY
Q3
3
10,000
Max
200
250
DC
20
32
20
25
50
15
—
—
—
—
—
—
—
—
1
4
4
Q4
Units
4
MHz
MHz
MHz
MHz
MHz
kHz
kHz
ms
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
PIC16F7X7
XT Oscillator mode
HS Oscillator mode
LP Oscillator mode
RC Oscillator mode
XT Oscillator mode
HS Oscillator mode
LP Oscillator mode
XT Oscillator mode
HS Oscillator mode
LP Oscillator mode
RC Oscillator mode
XT Oscillator mode
HS Oscillator mode
LP Oscillator mode
T
XT oscillator
LP oscillator
HS oscillator
XT oscillator
LP oscillator
HS oscillator
4
CY
= 4/F
Conditions
DS30498C-page 223
Q1
OSC