PIC18F4680-I/PT Microchip Technology, PIC18F4680-I/PT Datasheet - Page 336

• Manufacturer Part Number: PIC18F4680-I/PT
• Description: IC MCU FLASH 32KX16 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4680-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 64KB (32K x 16)
• Package / Case: 44-TQFP, 44-VQFP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 36
• Eeprom Size: 1K x 8
• Ram Size: 3.25K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3.25 KB
• Interface Type: I2C/SPI/EUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 44
• Number Of Timers: 4
• Operating Supply Voltage: 4.2 V to 5.5 V
• 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, DM163011
• Minimum Operating Temperature: - 25 C
• On-chip Adc: 11-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPI3-DB18F4680 - BOARD DAUGHTER ICEPIC3AC164305 - MODULE SKT FOR PM3 44TQFP444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18F2585/2680/4585/4680
Table 23-3 shows the relation between the clock
generated by the PLL and the frequency error from jitter
(measured jitter-induced error of 2%, Gaussian distribu-
tion, within 3 standard deviations), as a percentage of
the nominal clock frequency.
TABLE 23-3:
TABLE 23-4:
DS39625B-page 334
40 MHz
24 MHz
16 MHz
Output
Nominal PLL Output
PLL
40 MHz
24 MHz
16 MHz
0.83 ns
1.25 ns
0.5 ns
P
jitter
FREQUENCY ERROR FROM JITTER AT VARIOUS PLL GENERATED CLOCK SPEEDS
TOTAL FREQUENCY ERROR AT VARIOUS PLL GENERATED CLOCK SPEEDS
(100 PPM OSCILLATOR DRIFT, INCLUDING ERROR FROM JITTER)
1.67 ns
2.5 ns
T
(125 Kb/s)
1 ns
0.01209%
0.01313%
0.01125%
jitter
8 s
Frequency Error at Various Nominal Bit Times (Bit Rates)
(125 Kb/s)
0.00125%
0.00209%
0.00313%
8 s
Frequency Error at Various Nominal Bit Times (Bit Rates)
Preliminary
(250 Kb/s)
0.01250%
0.01418%
0.01625%
4 s
This is clearly smaller than the expected drift of a crystal
oscillator, typically specified at 100 ppm or 0.01%. If we
add jitter to oscillator drift, we have a total frequency drift
of 0.0132%. The total oscillator frequency errors for
common clock frequencies and bit rates, including both
drift and jitter, are shown in Table 23-4.
(250 Kb/s)
0.00250%
0.00418%
0.00625%
4 s
(500 Kb/s)
0.015%
0.018%
0.023%
2 s
(500 Kb/s)
0.005%
0.008%
0.013%
2 s
 2004 Microchip Technology Inc.
(1 Mb/s)
0.027%
0.035%
0.02%
(1 Mb/s)
1 s
0.017%
0.025%
0.01%
1 s