PIC18F8621-I/PT Microchip Technology, PIC18F8621-I/PT Datasheet - Page 23

• Manufacturer Part Number: PIC18F8621-I/PT
• Description: IC PIC MCU FLASH 32KX16 80TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F8621-I/PT

• Core Size: 8-Bit
• Program Memory Size: 64KB (32K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.75K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Controller Family/series: PIC18
• No. Of I/o's: 70
• Eeprom Memory Size: 1024Byte
• Ram Memory Size: 3.75KB
• Cpu Speed: 40MHz
• No. Of Timers: 5
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3840 B
• Interface Type: MSSP, SPI, I2C, EUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 69
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM183032
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• Package: 80TQFP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPAC164320 - MODULE SKT MPLAB PM3 80TQFPAC174011 - MODULE SKT PROMATEII 80TQFP
• Lead Free Status / Rohs Status: Details
• Other names: PIC18F8621-I/PTR; PIC18F8621-I/PTR

2.0
2.1
The PIC18F6525/6621/8525/8621 devices can be
operated in twelve different oscillator modes. The user
can program four configuration bits (FOSC3, FOSC2,
FOSC1 and FOSC0) to select one of these eight
modes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. ECIO+PLL
11. HS+SPLL
12. RCIO
2.2
In XT, LP, HS, HS+PLL or HS+SPLL Oscillator modes, a
crystal or ceramic resonator is connected to the OSC1
and OSC2 pins to establish oscillation. Figure 2-1 shows
the pin connections.
The PIC18F6525/6621/8525/8621 oscillator design
requires the use of a parallel cut crystal.
 2005 Microchip Technology Inc.
Note:
LP
XT
HS
RC
EC
ECIO
HS+PLL
RCIO
ECIO+SPLL External Clock with software
OSCILLATOR
CONFIGURATIONS
Oscillator Types
Crystal Oscillator/Ceramic
Resonators
Use of a series cut crystal may give a
frequency out of the crystal manufacturers
specifications.
enabled
with PLL enabled
pin enabled
with software control
Low-Power Crystal
Crystal/Resonator
High-Speed Crystal/Resonator
External Resistor/Capacitor
External Clock
External Clock with I/O pin
High-Speed Crystal/Resonator
External Resistor/Capacitor with
I/O pin enabled
controlled PLL
External Clock with PLL and I/O
High-Speed Crystal/Resonator
External Resistor/Capacitor with
I/O pin enabled
PIC18F6525/6621/8525/8621
FIGURE 2-1:
TABLE 2-1:
These values are for design guidance only.
See notes following this table.
Note 1:
Mode
Note 1: Higher capacitance increases the stability
HS
XT
C1
C2
2:
3:
2: When operating below 3V V
3: Since each resonator/crystal has its own
4 MHz
2 kHz
(1)
(1)
of the oscillator but also increases the
start-up time.
using certain ceramic resonators at any
voltage, it may be necessary to use high
gain HS mode, try a lower frequency
resonator or switch to a crystal oscillator.
characteristics, the user should consult the
resonator/crystal manufacturer for appro-
priate values of external components or
verify oscillator performance.
See Table 2-1 and Table 2-2 for
recommended values of C1 and C2.
A series resistor (R
AT strip cut crystals.
R
16.0 MHz
XTAL
R
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
F
S
Freq
varies with the oscillator mode chosen.
(2)
Resonators Used:
CAPACITOR SELECTION FOR
CERAMIC RESONATORS
OSC2
OSC1
Ranges Tested:
CRYSTAL/CERAMIC
RESONATOR OPERATION
(HS, XT OR LP
CONFIGURATION)
68-100 pF
15-68 pF
15-68 pF
10-68 pF
10-22 pF
PIC18F6X2X/8X2X
S
R
) may be required for
C1
F
(3)
16 MHz
DS39612B-page 21
8 MHz
Sleep
DD
68-100 pF
15-68 pF
15-68 pF
10-68 pF
10-22 pF
, or when
To
Internal
Logic
C2