PIC18F8722T-I/PT Microchip Technology, PIC18F8722T-I/PT Datasheet - Page 34

• Manufacturer Part Number: PIC18F8722T-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,80PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F8722T-I/PT

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DV164136 - DEVELOPMENT KIT FOR PIC18XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPAC164320 - MODULE SKT MPLAB PM3 80TQFPAC174011 - MODULE SKT PROMATEII 80TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F8722 FAMILY
TABLE 2-2:
DS39646C-page 32
Capacitor values are for design guidance only.
Different capacitor values may be required to produce
acceptable oscillator operation. The user should test
the performance of the oscillator over the expected
V
to the following application notes for oscillator specific
information:
• AN588 – PIC
• AN826 – Crystal Oscillator Basics and Crystal
• AN849 – Basic PIC
• AN943 – Practical PIC
• AN949 – Making Your Oscillator Work
See the notes following this table for additional
information.
Osc Type
DD
Guide
Selection for rfPIC
Design
Note 1: Higher capacitance increases the stability
HS
XT
LP
and temperature range for the application. Refer
2: When operating below 3V V
3: Since each resonator/crystal has its own
4: Rs may be required to avoid overdriving
5: Always verify oscillator performance over
of the oscillator but also increases the
start-up time.
using certain ceramic resonators at any
voltage, it may be necessary to use the
HS mode or switch to a crystal oscillator.
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate
components.
crystals with low drive level specification.
the V
expected for the application.
10 MHz
20 MHz
25 MHz
Crystal
32 kHz
1 MHz
4 MHz
4 MHz
®
Freq
CAPACITOR SELECTION FOR
QUARTZ CRYSTALS
Microcontroller Oscillator Design
DD
®
and temperature range that is
®
and PIC
Oscillator Design
®
Typical Capacitor Values
Oscillator Analysis and
values
22 pF
22 pF
22 pF
22 pF
22 pF
22 pF
22 pF
®
C1
Devices
Tested:
of
DD
, or when
22 pF
22 pF
22 pF
22 pF
22 pF
22 pF
22 pF
external
C2
An external clock source may also be connected to the
OSC1 pin in the HS mode, as shown in Figure 2-2.
When operated in this mode, parameters D033 and
D043 apply.
FIGURE 2-2:
2.3
The EC and ECIO Oscillator modes require an external
clock source to be connected to the OSC1 pin. There is
no oscillator start-up time required after a Power-on
Reset or after an exit from Sleep mode.
In the EC Oscillator mode, the oscillator frequency
divided by 4 is available on the OSC2 pin. This signal
may be used for test purposes or to synchronize other
logic. Figure 2-3 shows the pin connections for the EC
Oscillator mode.
FIGURE 2-3:
The ECIO Oscillator mode functions like the EC mode,
except that the OSC2 pin becomes an additional
general purpose I/O pin. The I/O pin becomes bit 6 of
PORTA (RA6). Figure 2-4 shows the pin connections
for the ECIO Oscillator mode. When operated in this
mode, parameters D033A and D043A apply.
FIGURE 2-4:
Clock from
Ext. System
Clock from
Ext. System
Clock from
Ext. System
External Clock Input
F
RA6
Open
OSC
/4
EXTERNAL CLOCK INPUT
OPERATION (HS OSC
CONFIGURATION)
EXTERNAL CLOCK
INPUT OPERATION
(EC CONFIGURATION)
EXTERNAL CLOCK
INPUT OPERATION
(ECIO CONFIGURATION)
© 2008 Microchip Technology Inc.
OSC1/CLKI
I/O (OSC2)
OSC1/CLKI
OSC2/CLKO
OSC1
OSC2
PIC18FXXXX
PIC18FXXXX
PIC18FXXXX
(HS Mode)