PIC18F27J53T-I/SO Microchip Technology, PIC18F27J53T-I/SO Datasheet - Page 61

• Manufacturer Part Number: PIC18F27J53T-I/SO
• Description: 28-pin, USB, 128KB Flash, 4KB RAM, 12 MIPS, 12-bit ADC, NanoWatt XLP 28 SOIC .30
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F27J53T-I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2.15 V ~ 3.6 V
• Data Converters: A/D 10x10b/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3.8 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 8
• Operating Supply Voltage: 2.15 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

4.7
The Ultra Low-Power Wake-up (ULPWU) on RA0 allows
a slow falling voltage to generate an interrupt-on-change
without excess current consumption.
Follow these steps to use this feature:
1.
2.
3.
4.
5.
6.
7.
8.
 2010 Microchip Technology Inc.
Configure a remappable output pin to output the
ULPOUT signal.
Map an INTx interrupt-on-change input function to
the same pin as used for the ULPOUT output func-
tion. Alternatively, in step 1, configure ULPOUT to
output onto a PORTB interrupt-on-change pin.
Charge the capacitor on RA0 by configuring the
RA0 pin to an output and setting it to ‘1’.
Enable interrupt-on-change (PIE bit) for the
corresponding pin selected in step 2.
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.
Ultra Low-Power Wake-up
Preliminary
PIC18F47J53 FAMILY
When the voltage on RA0 drops below V
will be generated, which will cause the device to
wake-up and execute 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 causes the device to
wake-up from Sleep mode, the ULPLVL (WDTCON<5>)
bit is set. When the ULPWU module causes the device
to
(DSWAKEL<5>) bit is set. Software can check these bits
upon wake-up to determine the wake-up source. Also in
Sleep mode, only the remappable output function,
ULPWU, will output this bit value to an RPn pin for
externally detecting wake-up events.
See Example 4-1 for initializing the ULPWU module.
Note:
wake-up
For module related bit definitions, see the
WDTCON
“Watchdog Timer (WDT)” and the
DSWAKEL register (Register 4-6).
from
Deep
register
Sleep,
in
DS39964B-page 61
IL
Section 28.2
the
, an interrupt
DSULP