PIC16F677-I/SO Microchip Technology, PIC16F677-I/SO Datasheet - Page 65
![IC PIC MCU FLASH 2KX14 20SOIC](/photos/6/64/66480/150-20-soic_sml.jpg)
PIC16F677-I/SO
Manufacturer Part Number
PIC16F677-I/SO
Description
IC PIC MCU FLASH 2KX14 20SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F690DM-PCTLHS.pdf
(306 pages)
3.PIC16F677-IP.pdf
(2 pages)
4.PIC16F677-IP.pdf
(16 pages)
5.PIC16F677-ISO.pdf
(294 pages)
Specifications of PIC16F677-I/SO
Program Memory Type
FLASH
Program Memory Size
3.5KB (2K x 14)
Package / Case
20-SOIC (7.5mm Width)
Mfg Application Notes
Intro to Capacitive Sensing Appl Notes Layout and Physical Design Appl Note
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
18
Eeprom Size
256 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
SSP
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
17
Number Of Timers
2
Operating Supply Voltage
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
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
Minimum Operating Temperature
- 40 C
On-chip Adc
12-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC162061 - HEADER INTRFC MPLAB ICD2 20PINAC164039 - MODULE SKT PROMATE II 20DIP/SOIC
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- PIC16F690DM-PCTLHS PDF datasheet #2
- PIC16F677-IP PDF datasheet #3
- PIC16F677-IP PDF datasheet #4
- PIC16F677-ISO PDF datasheet #5
- Current page: 65 of 294
- Download datasheet (6Mb)
4.2.4
The Ultra Low-Power Wake-up (ULPWU) on RA0 allows
a slow falling voltage to generate an interrupt-on-change
on RA0 without excess current consumption. The mode
is selected by setting the ULPWUE bit of the PCON
register. This enables a small current sink, which can be
used to discharge a capacitor on RA0.
Follow these steps to use this feature:
a)
b)
c)
d)
e)
will be generated which will cause the device to
wake-up and execute the next instruction. If the GIE bit
of the INTCON register is set, the device will then call
the interrupt vector (0004h). See Section 4.4.2 “Inter-
rupt-on-change”
“PORTA/PORTB Interrupt” for more information.
This feature provides a low-power technique for
periodically waking up the device from Sleep. The
time-out is dependent on the discharge time of the RC
circuit on RA0. See Example 4-2 for initializing the
Ultra Low-Power Wake-up module.
© 2006 Microchip Technology Inc.
When the voltage on RA0 drops below V
Charge the capacitor on RA0 by configuring the
RA0 pin to output (= 1).
Configure RA0 as an input.
Enable interrupt-on-change for RA0.
Set the ULPWUE bit of the PCON register to
begin the capacitor discharge.
Execute a SLEEP instruction.
ULTRA LOW-POWER WAKE-UP
and
PIC16F631/677/685/687/689/690
Section 14.3.3
IL
, an interrupt
Preliminary
A series resistor between RA0 and the external
capacitor provides overcurrent protection for the
RA0/AN0/C1IN+/ICSPDAT/ULPWU pin and can allow
for software calibration of the time-out (see Figure 4-1).
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 interrupt delay.
This technique will compensate for the affects of
temperature, voltage and component accuracy. The
Ultra Low-Power Wake-up peripheral can also be
configured as a simple Programmable Low-Voltage
Detect or temperature sensor.
EXAMPLE 4-2:
BCF
BCF
BSF
BSF
BCF
BSF
BCF
BCF
CALL
BSF
BSF
BSF
MOVLW
MOVWF
BCF
SLEEP
Note:
STATUS,RP0
STATUS,RP1
PORTA,0
STATUS,RP1
ANSEL,0
STATUS,RP0
STATUS,RP1
TRISA,0
CapDelay
PCON,ULPWUE
IOCA,0
TRISA,0
B’10001000’
INTCON
STATUS,RP0
For more information, refer to Application
Note AN879, “Using the Microchip Ultra
Low-Power Wake-up Module” (DS00879).
ULTRA LOW-POWER
WAKE-UP INITIALIZATION
;Bank 0
;
;Set RA0 data latch
;Bank 2
;RA0 to digital I/O
;Bank 1
;
;Output high to
;charge capacitor
;Enable ULP Wake-up
;Select RA0 IOC
;RA0 to input
;Enable interrupt
;and clear flag
;Bank 0
;Wait for IOC
DS41262C-page 63
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