PIC16F819 Microchip Technology Inc., PIC16F819 Datasheet - Page 133

• Manufacturer Part Number: PIC16F819
• Description: 18/20-pin Enhanced Flash Microcontrollers With Nanowatt Technology
• Manufacturer: Microchip Technology Inc.

FIGURE 15-4:
TABLE 15-1:
 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
OSC
CY
OS
OS
OS
OS
OSC
only and are not tested.
Instruction cycle period (T
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.
Sym
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
) equals four times the input oscillator time base period. All specified values
Q1
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†
T
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
3
CY
Q3
10,000
Max
3
200
250
DC
20
32
20
25
50
15
—
—
—
—
—
—
—
—
1
4
4
PIC16F818/819
Units
MHz XT and RC Oscillator mode
MHz HS Oscillator mode
MHz RC Oscillator mode
MHz XT Oscillator mode
MHz
kHz
kHz
ms
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Q4
4
LP Oscillator mode
HS Oscillator mode
LP Oscillator mode
XT and RC 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
CY
4
= 4/F
Conditions
OSC
DS39598E-page 131
Q1