PIC16C712-20/SO Microchip Technology, PIC16C712-20/SO Datasheet - Page 53

• Manufacturer Part Number: PIC16C712-20/SO
• Description: IC MCU OTP 1KX14 A/D PWM 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C712-20/SO

• Core Size: 8-Bit
• Program Memory Size: 1.75KB (1K x 14)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Core Processor: PIC
• Speed: 20MHz
• Number Of I /o: 13
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 18-SOIC (7.5mm Width)
• Controller Family/series: PIC16C
• No. Of I/o's: 13
• Ram Memory Size: 128Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

9.2
9.2.1
The PIC16CXXX can be operated in four different oscil-
lator modes. The user can program two configuration
bits (FOSC1 and FOSC0) to select one of these four
modes:
• LP
• XT
• HS
• RC
9.2.2
In XT, LP or HS modes, a crystal or ceramic resonator
is connected to the OSC1/CLKIN and OSC2/CLKOUT
pins
PIC16CXXX oscillator design requires the use of a par-
allel cut crystal. Use of a series cut crystal may give a
frequency out of the crystal manufacturers specifica-
tions. When in XT, LP or HS modes, the device can
have
OSC1/CLKIN pin (Figure 9-3).
FIGURE 9-2:
FIGURE 9-3:
1999 Microchip Technology Inc.
Note 1: See Table 9-1 and Table 9-2 for recom-
Clock from
ext. system
to
an
C1
C2
2: A series resistor (RS) may be required for
3: RF varies with the crystal chosen.
Oscillator Configurations
CRYSTAL OSCILLATOR/CERAMIC
RESONATORS
OSCILLATOR TYPES
(1)
(1)
Low Power Crystal
Crystal/Resonator
High Speed Crystal/Resonator
Resistor/Capacitor
establish
mended values of C1 and C2.
AT strip cut crystals.
external
XTAL
RS
Open
(2)
CRYSTAL/CERAMIC
RESONATOR OPERATION
(HS, XT OR LP
OSC CONFIGURATION)
EXTERNAL CLOCK INPUT
OPERATION (HS, XT OR LP
OSC CONFIGURATION)
OSC1
OSC2
oscillation
clock
OSC1
OSC2
source
RF
PIC16C7XX
(3)
PIC16C7XX
(Figure 9-2).
SLEEP
to
drive
internal
logic
The
Preliminary
To
the
TABLE 9-1
TABLE 9-2
Ranges Tested:
XT
HS
Note 1: Recommended values of C1 and C2 are
Osc Type
Mode
HS
XT
LP
2: Higher capacitance increases the stability
3: Since each resonator/crystal has its own
4: Rs may be required in HS mode, as well as
These values are for design guidance only. See
notes at bottom of page.
These values are for design guidance only. See
notes at bottom of page.
identical to the ranges tested (Table 9-1).
of the oscillator, but also increases the start-
up time.
characteristics, the user should consult the
resonator/crystal manufacturer for appropri-
ate values of external components.
XT mode to avoid overdriving crystals with
low drive level specification.
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
16.0 MHz
PIC16C712/716
200 kHz
200 kHz
Freq
Crystal
20 MHz
32 kHz
1 MHz
4 MHz
4 MHz
8 MHz
Freq
CERAMIC RESONATORS
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
68 - 100 pF
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
Cap. Range
47-68 pF
15-33 pF
15-33 pF
OSC1
33 pF
15 pF
15 pF
15 pF
15 pF
C1
DS41106A-page 53
68 - 100 pF
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
Cap. Range
47-68 pF
15-33 pF
15-33 pF
OSC2
33 pF
15 pF
15 pF
15 pF
15 pF
C2