PIC12F635ESS datasheet(181/234 Pages) MICROCHIP

181 / 234 page

DS41232D-page 179

PIC12F635/PIC16F636/639

15.10 AC Characteristics: PIC12F635/PIC16F636/639 (Industrial, Extended)

FIGURE 15-5:

CLOCK TIMING

TABLE 15-1:

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)

—

kHz

LP Oscillator mode

—

MHz

XT Oscillator mode

—

MHz

HS Oscillator mode

—

MHz

EC Oscillator mode

Oscillator Frequency(1)

—

32.768

—

kHz

LP Oscillator mode

0.1

—

MHz

XT Oscillator mode

—

MHz

HS Oscillator mode

—

MHz

RC Oscillator mode

OS02

TOSC

External CLKIN Period(1)

—

∞μs

LP Oscillator mode

250

—

∞

XT Oscillator mode

—

∞

HS Oscillator mode

—

∞

EC Oscillator mode

Oscillator Period(1)

—30.5

—

μs

LP Oscillator mode

250

—

10,000

XT Oscillator mode

—

1,000

HS Oscillator mode

250

—

RC Oscillator mode

OS03

TCY

Instruction Cycle Time(1)

200

TCY

TCY = 4/FOSC

OS04*

TosH,

TosL

External CLKIN High,

External CLKIN Low

2—

—

μs

LP oscillator

100

—

XT oscillator

—

HS oscillator

OS05*

TosR,

TosF

External CLKIN Rise,

External CLKIN Fall

—

LP oscillator

—

XT oscillator

—

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.

OSC1/CLKIN

OSC2/CLKOUT

OS02

OS03

OS04

OSC2/CLKOUT

(LP, XT, HS Modes)

(CLKOUT Mode)

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