PIC16F631_08 Datasheet, PDF (243/306 Pages) Microchip Technology – 20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F631/677/685/687/689/690
17.7 AC Characteristics: PIC16F631/677/685/687/689/690 (Industrial, Extended)
FIGURE 17-4:
CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
Q1
OSC1/CLKIN
OSC2/CLKOUT
(LP,XT,HS Modes)
OS02
OS04 OS04
OS03
OSC2/CLKOUT
(CLKOUT Mode)
TABLE 17-1: CLOCK OSCILLATOR TIMING REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40°C ≤ TA ≤ +125°C
Param
No.
Sym.
Characteristic
Min. Typ† Max. Units
Conditions
OS01 _{FOSC External CLKIN Frequency}⁽¹⁾
DC
—
37
kHz LP Oscillator mode
DC
—
4
MHz XT Oscillator mode
DC
—
20
MHz HS Oscillator mode
DC
—
20
MHz EC Oscillator mode
Oscillator Frequency⁽¹⁾
— 32.768 —
kHz LP Oscillator mode
0.1
—
4
MHz XT Oscillator mode
1
—
20
MHz HS Oscillator mode
DC
—
4
MHz RC Oscillator mode
OS02 TOSC External CLKIN Period⁽¹⁾
27
—
∞
μs LP Oscillator mode
250
—
∞
ns XT Oscillator mode
50
—
∞
ns HS Oscillator mode
50
—
∞
ns EC Oscillator mode
Oscillator Period⁽¹⁾
—
30.5
—
μs LP Oscillator mode
250
— 10,000 ns XT Oscillator mode
50
—
1,000
ns HS Oscillator mode
250
—
—
ns RC Oscillator mode
OS03 _TCY
Instruction Cycle Time⁽¹⁾
200
TCY
DC
ns TCY = 4/FOSC
OS04* TOSH, External CLKIN High,
TOSL External CLKIN Low
2
—
100
—
—
μs LP oscillator
—
ns XT oscillator
20
—
—
ns HS oscillator
OS05* TOSR, External CLKIN Rise,
TOSF External CLKIN Fall
0
—
∞
ns LP oscillator
0
—
∞
ns XT oscillator
0
—
∞
ns HS oscillator
* These parameters are characterized but not tested.
† 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 OSC1 pin. When an
external clock input is used, the ‘max’ cycle time limit is ‘DC’ (no clock) for all devices.
© 2008 Microchip Technology Inc.
DS41262E-page 241