PIC18F25K80-E/SO Microchip Technology, PIC18F25K80-E/SO Datasheet - Page 61
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PIC18F25K80-E/SO
Manufacturer Part Number
PIC18F25K80-E/SO
Description
ECAN, 32KB Flash, 4KB RAM, 16 MIPS, 12-bit ADC, CTMU 28 SOIC .300in TUBE
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheet
1.PIC18F25K80-ISO.pdf
(628 pages)
Specifications of PIC18F25K80-E/SO
Core Processor
PIC
Core Size
8-Bit
Speed
64MHz
Connectivity
ECAN, I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
24
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
3.6K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
*
Processor Series
PIC18F25K80
Core
PIC
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
I2C, SPI, USART
Maximum Clock Frequency
64 MHz
Number Of Programmable I/os
24
Number Of Timers
5
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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3.5.2
The EC and ECPLL 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.
Oscillator mode.
FIGURE 3-5:
An external clock source may also be connected to the
OSC1 pin in the HS mode, as shown in
this configuration, the divide-by-4 output on OSC2 is
not available. Current consumption in this configuration
will be somewhat higher than EC mode, as the internal
oscillator’s feedback circuitry will be enabled (in EC
mode, the feedback circuit is disabled).
FIGURE 3-6:
3.5.3
A Phase Lock Loop (PLL) circuit is provided as an
option for users who want to use a lower frequency
oscillator circuit or to clock the device up to its highest
rated frequency from a crystal oscillator. This may be
useful for customers who are concerned with EMI due
to high-frequency crystals or users who require higher
clock speeds from an internal oscillator.
2011 Microchip Technology Inc.
Clock from
Ext. System
Clock from
Ext. System
Figure 3-5
EXTERNAL CLOCK INPUT
(EC MODES)
PLL FREQUENCY MULTIPLIER
F
OSC
Open
shows the pin connections for the EC
/4
EXTERNAL CLOCK
INPUT OPERATION
(EC CONFIGURATION)
EXTERNAL CLOCK INPUT
OPERATION (HS OSC
CONFIGURATION)
OSC1/CLKI
OSC2/CLKO
OSC1
OSC2
PIC18F66K80
PIC18F66K80
(HS Mode)
Figure
3-6. In
Preliminary
PIC18F66K80 FAMILY
3.5.3.1
The HSPLL and ECPLL modes provide the ability to
selectively run the device at four times the external
oscillating source to produce frequencies up to
64 MHz.
The PLL is enabled by setting the PLLEN bit
(OSCTUNE<6>) or the PLLCFG bit (CONFIG1H<4>).
For the HF-INTOSC as primary, the PLL must be
enabled with the PLLEN. This provides a software con-
trol for the PLL, enabling even if PLLCFG is set to ‘1’,
so that the PLL is enabled only when the HF-INTOSC
frequency is within the 4 MHz to16 MHz input range.
This also enables additional flexibility for controlling the
application’s clock speed in software. The PLLEN
should be enabled in HF-INTOSC mode only if the
input frequency is in the range of 4 MHz-16 MHz.
FIGURE 3-7:
3.5.3.2
The PLL is available to the internal oscillator block
when the internal oscillator block is configured as the
primary clock source. In this configuration, the PLL is
enabled in software and generates a clock output of up
to 64 MHz.
The operation of INTOSC with the PLL is described in
Section 3.6.2 “INTPLL
that the PLL is enabled only if the HF-INTOSC
postscaler is configured for 4 MHz, 8 MHz or 16 MHz
OSC2
OSC1
PLL Enable (OSCTUNE<6>)
HS or EC
PLLCFG (CONFIG1H<4>)
Mode
HSPLL and ECPLL Modes
PLL and HF-INTOSC
F
F
IN
OUT
PLL BLOCK DIAGRAM
4
Modes”. Care should be taken
Comparator
Loop
Filter
Phase
VCO
DS39977C-page 61
SYSCLK
.
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