PIC12F683-I/MD Microchip Technology Inc., PIC12F683-I/MD Datasheet - Page 21

• Manufacturer Part Number: PIC12F683-I/MD
• Description: 8 PIN, 3.5KB FLASH, 128 RAM, 6 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC12F683-I/MD

• A/d Inputs: 4-Channel, 10-Bit
• Comparators: 1
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Frequency: 20 MHz
• Input Output: 6
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 8-Pin PDIP
• Programmable Memory: 3.5K Bytes
• Ram Size: 128 Bytes
• Serial Interface: None
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

3.0
3.1
The PIC12F683 has a wide variety of clock sources and
selection features to allow it to be used in a wide range
of applications while maximizing performance and mini-
mizing power consumption. Figure 3-1 illustrates a block
diagram of the PIC12F683 clock sources.
Clock sources can be configured from external oscilla-
tors, quartz crystal resonators, ceramic resonators and
Resistor-Capacitor (RC) circuits. In addition, the sys-
tem clock source can be configured from one of two
internal oscillators, with a choice of speeds selectable
via software. Additional clock features include:
• Selectable system clock source between external
• Two-Speed Clock Start-up mode, which
• Fail-Safe Clock Monitor (FSCM) designed to
FIGURE 3-1:
 2004 Microchip Technology Inc.
or internal via software.
minimizes latency between external oscillator
start-up and code execution.
detect a failure of the external clock source (LP,
XT, HS, EC or RC modes) and switch to the
internal oscillator.
OSC2
OSC1
CLOCK SOURCES
Overview
External Oscillator
Internal Oscillator
HFINTOSC
LFINTOSC
31 kHz
8 MHz
PIC12F683 CLOCK SOURCE BLOCK DIAGRAM
Sleep
500 kHz
250 kHz
125 kHz
31 kHz
8 MHz
4 MHz
2 MHz
1 MHz
Preliminary
(OSCCON<6:4>)
IRCF<2:0>
111
110
101
100
011
010
001
000
The PIC12F683 can be configured in one of eight clock
modes.
1.
2.
3.
4.
5.
6.
7.
8.
Clock source modes are configured by the FOSC<2:0>
bits
Section 12.0 “Special Features of the CPU”). The
internal clock can be generated by two oscillators. The
HFINTOSC is a high-frequency calibrated oscillator. The
LFINTOSC is a low-frequency uncalibrated oscillator.
LP, XT, HS, RC, RCIO, EC
EC – External clock with I/O on GP4.
LP – Low gain crystal or Ceramic Resonator
Oscillator mode.
XT – Medium gain crystal or Ceramic Resonator
Oscillator mode.
HS – High gain crystal or Ceramic Resonator
mode.
RC – External Resistor-Capacitor (RC) with
F
RCIO – External Resistor-Capacitor with I/O on
GP4.
INTRC – Internal oscillator with F
on GP4 and I/O on GP5.
INTRCIO – Internal oscillator with I/O on GP4
and GP5.
OSC
in
/4 output on GP4
the
Power-up Timer (PWRT)
Watchdog Timer (WDT)
Fail-Safe Clock Monitor (FSCM)
Configuration
(Configuration Word)
(OSCCON<0>)
FOSC<2:0>
PIC12F683
SCS
(CPU and Peripherals)
Word
DS41211B-page 19
System Clock
OSC
register
/4 output
(see