PIC16F737-I Datasheet, PDF (225/276 Pages) Microchip Technology – 28/40/44-Pin, 8-Bit CMOS Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

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