PIC16F1513-I/SP View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
PIC16F1513-I/SP Datasheet PDF : 360 Pages
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PIC16(L)F1512/3
FIGURE 5-3:
QUARTZ CRYSTAL
OPERATION (LP, XT OR
HS MODE)
PIC® MCU
C1
Quartz
Crystal
OSC1/CLKIN
RF(2)
To Internal
Logic
Sleep
C2
RS(1)
OSC2/CLKOUT
Note 1: A series resistor (RS) may be required for
quartz crystals with low drive level.
2: The value of RF varies with the Oscillator mode
selected (typically between 2 M to 10 M.
Note 1: Quartz crystal characteristics vary
according to type, package and
manufacturer. The user should consult the
manufacturer data sheets for specifications
and recommended application.
2: Always verify oscillator performance over
the VDD and temperature range that is
expected for the application.
3: For oscillator design assistance, reference
the following Microchip Applications Notes:
• AN826, “Crystal Oscillator Basics and
Crystal Selection for rfPIC® and PIC®
Devices” (DS00826)
• AN849, “Basic PIC® Oscillator Design”
(DS00849)
• AN943, “Practical PIC® Oscillator
Analysis and Design” (DS00943)
• AN949, “Making Your Oscillator Work”
(DS00949)
FIGURE 5-4:
CERAMIC RESONATOR
OPERATION
(XT OR HS MODE)
PIC® MCU
OSC1/CLKIN
C1
To Internal
Logic
RP(3)
RF(2)
Sleep
C2 Ceramic RS(1)
Resonator
OSC2/CLKOUT
Note 1: A series resistor (RS) may be required for
ceramic resonators with low drive level.
2: The value of RF varies with the Oscillator mode
selected (typically between 2 M to 10 M.
3: An additional parallel feedback resistor (RP)
may be required for proper ceramic resonator
operation.
5.2.1.3 Oscillator Start-up Timer (OST)
If the oscillator module is configured for LP, XT or HS
modes, the Oscillator Start-up Timer (OST) counts
1024 oscillations from OSC1. This occurs following a
Power-on Reset (POR) and when the Power-up Timer
(PWRT) has expired (if configured), or a wake-up from
Sleep. During this time, the program counter does not
increment and program execution is suspended unless
either FSCM or Two-Speed Start-up are enabled, in
which case code will continue to execute while the OST
is counting. The OST ensures that the oscillator circuit,
using a quartz crystal resonator or ceramic resonator,
has started and is providing a stable system clock to
the oscillator module.
In order to minimize latency between external oscillator
start-up and code execution, the Two-Speed Clock
Start-up mode can be selected (see Section 5.4
“Two-Speed Clock Start-up Mode”).
DS40001624C-page 44
2012-2014 Microchip Technology Inc.
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