PIC16LC773-04SLASHSP datasheet(129/200 Pages) MICROCHIP

129 / 200 page

PIC16C77X

Advance Information

DS30275A-page 129

FIGURE 12-2: CRYSTAL/CERAMIC

RESONATOR OPERATION

(HS, XT OR LP

OSC CONFIGURATION)

FIGURE 12-3: EXTERNAL CLOCK INPUT

OPERATION (HS OSC

CONFIGURATION)

TABLE 12-1

CERAMIC RESONATORS

TABLE 12-2

CAPACITOR SELECTION FOR

CRYSTAL OSCILLATOR

Ranges Tested:

Mode

Freq

OSC1

OSC2

455 kHz

2.0 MHz

4.0 MHz

68 - 100 pF

15 - 68 pF

68 - 100 pF

15 - 68 pF

8.0 MHz

16.0 MHz

10 - 68 pF

10 - 22 pF

10 - 68 pF

10 - 22 pF

These values are for design guidance only. See

notes at bottom of page.

Resonators Used:

455 kHz

Panasonic EFO-A455K04B

± 0.3%

2.0 MHz

Murata Erie CSA2.00MG

± 0.5%

4.0 MHz

Murata Erie CSA4.00MG

± 0.5%

8.0 MHz

Murata Erie CSA8.00MT

± 0.5%

16.0 MHz Murata Erie CSA16.00MX

± 0.5%

All resonators used did not have built-in capacitors.

Note1:

See Table 12-1 and Table 12-2 for recom-

mended values of C1 and C2.

A series resistor (RS) may be required for

AT strip cut crystals.

RF varies with the crystal chosen.

C1(1)

C2(1)

XTAL

OSC2

OSC1

RF(3)

SLEEP

logic

PIC16C77X

RS(2)

internal

OSC1

OSC2

Open

Clock from

ext. system

PIC16C77X

Osc Type

Crystal

Freq

Cap. Range

32 kHz

33 pF

200 kHz

15 pF

200 kHz

47-68 pF

1 MHz

15 pF

4 MHz

15 pF

4 MHz

15 pF

8 MHz

15-33 pF

20 MHz

15-33 pF

These values are for design guidance only. See

notes at bottom of page.

Crystals Used

32 kHz

Epson C-001R32.768K-A

± 20 PPM

200 kHz

STD XTL 200.000KHz

± 20 PPM

1 MHz

ECS ECS-10-13-1

± 50 PPM

4 MHz

ECS ECS-40-20-1

± 50 PPM

8 MHz

EPSON CA-301 8.000M-C

± 30 PPM

20 MHz

EPSON CA-301 20.000M-C

± 30 PPM

Note 1: Recommended values of C1 and C2 are

identical to the ranges tested (Table 12-1).

2: Higher capacitance increases the stability

of oscillator but also increases the start-up

time.

3: Since each resonator/crystal has its own

characteristics, the user should consult the

resonator/crystal manufacturer for appropri-

ate values of external components.

4: Rs may be required in HS mode as well as

XT mode to avoid overdriving crystals with

low drive level specification.

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