PIC18F25K80T-I/MM Microchip Technology, PIC18F25K80T-I/MM Datasheet - Page 79
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PIC18F25K80T-I/MM
Manufacturer Part Number
PIC18F25K80T-I/MM
Description
ECAN, 32KB Flash, 4KB RAM, 16 MIPS, 12-bit ADC, CTMU 28 QFN-S 6x6mm T/R
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheet
1.PIC18F25K80-ISO.pdf
(628 pages)
Specifications of PIC18F25K80T-I/MM
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 ~ 85°C
Package / Case
*
Processor Series
PIC18F25K80
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3648 B
Interface Type
I2C, SPI
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
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F25K80T-I/MM
Manufacturer:
MICROCHIP
Quantity:
3 000
- Current page: 79 of 628
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4.7
The Ultra Low-Power Wake-up (ULPWU) on pin, RA0,
allows a slow falling voltage to generate an interrupt
without excess current consumption.
To use this feature:
1.
2.
3.
4.
5.
When the voltage on RA0 drops below V
wakes up and executes the next instruction.
This feature provides a low-power technique for
periodically waking up the device from Sleep mode.
The time-out is dependent on the discharge time of the
RC circuit on RA0.
When the ULPWU module wakes the device from
Sleep mode, the ULPLVL bit (WDTCON<5>) is set.
Software can check this bit upon wake-up to determine
the wake-up source.
See
EXAMPLE 4-1:
2011 Microchip Technology Inc.
TRISAbits.TRISA0 = 0;
PORTAbits.RA0 = 1;
for(i = 0; i < 10000; i++) Nop();
TRISAbits.TRISA0 = 1;
WDTCONbits.ULPEN = 1;
WDTCONbits.ULPSINK = 1;
OSCCONbits.IDLEN = 0;
Sleep();
Charge the capacitor on RA0 by configuring the
RA0 pin to an output and setting it to ‘1’.
Stop charging the capacitor by configuring RA0
as an input.
Discharge the capacitor by setting the ULPEN
and ULPSINK bits in the WDTCON register.
Configure Sleep mode.
Enter Sleep mode.
Example 4-1
Ultra Low-Power Wake-up
//***************************
//Charge the capacitor on RA0
//***************************
//*****************************
//Stop Charging the capacitor
//on RA0
//*****************************
//*****************************
//Enable the Ultra Low Power
//Wakeup module and allow
//capacitor discharge
//*****************************
//For Sleep
//Enter Sleep Mode
//
//for sleep, execution will
//resume here
for initializing the ULPWU module.
ULTRA LOW-POWER
WAKE-UP INITIALIZATION
IL
, the device
Preliminary
PIC18F66K80 FAMILY
A series resistor, between RA0 and the external
capacitor, provides overcurrent protection for the RA0/
CV
calibration of the time-out (see
FIGURE 4-9:
A timer can be used to measure the charge time and
discharge time of the capacitor. The charge time can
then be adjusted to provide the desired delay in Sleep.
This technique compensates for the affects of
temperature, voltage and component accuracy. The
peripheral can also be configured as a simple
programmable Low-Voltage Detect (LVD) or temperature
sensor.
Note:
REF
RA0/C
/AN0/ULPWU
VREF
For more information, see AN879, “Using
the Microchip Ultra Low-Power Wake-up
Module” (DS00879).
/AN0/ULPWU
ULTRA LOW-POWER
WAKE-UP INITIALIZATION
pin
and
Figure
enables
DS39977C-page 79
4-9).
software
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