PIC16F77-I/LG Microchip Technology, PIC16F77-I/LG Datasheet - Page 147
![IC MCU FLASH 8KX14 W/AD 44PLCC](/photos/6/63/66325/150-44-plcc_sml.jpg)
PIC16F77-I/LG
Manufacturer Part Number
PIC16F77-I/LG
Description
IC MCU FLASH 8KX14 W/AD 44PLCC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F818-ISO.pdf
(6 pages)
4.PIC16F73-ISP.pdf
(174 pages)
5.PIC16F73-ISP.pdf
(14 pages)
6.PIC16F73-ISP.pdf
(12 pages)
Specifications of PIC16F77-I/LG
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
33
Program Memory Size
14KB (8K x 14)
Program Memory Type
FLASH
Ram Size
368 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
For Use With
DVA16XL441 - ADAPTER DEVICE ICE 44PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16F818-ISO PDF datasheet #3
- PIC16F73-ISP PDF datasheet #4
- PIC16F73-ISP PDF datasheet #5
- PIC16F73-ISP PDF datasheet #6
- Current page: 147 of 688
- Download datasheet (3Mb)
1997 Microchip Technology Inc.
Four of PORTB’s pins, RB7:RB4, have an interrupt on change feature. Only pins configured as
inputs can cause this interrupt to occur (i.e. any RB7:RB4 pin configured as an output is excluded
from the interrupt on change comparison). The input pins (of RB7:RB4) are compared with the
old value latched on the last read of PORTB. The “mismatch” outputs of RB7:RB4 are OR’ed
together to generate the RB Port Change Interrupt with flag bit RBIF (INTCON<0>).
This interrupt can wake the device from SLEEP. The user, in the interrupt service routine, can
clear the interrupt in the following manner:
a)
b)
A mismatch condition will continue to set flag bit RBIF. Reading PORTB will end the mismatch
condition, and allow flag bit RBIF to be cleared.
This interrupt on mismatch feature, together with software configurable pull-ups on these four
pins allow easy interface to a keypad and make it possible for wake-up on key-depression.
The interrupt on change feature is recommended for wake-up on key depression and operations
where PORTB is only used for the interrupt on change feature. Polling of PORTB is not recom-
mended while using the interrupt on change feature.
Figure 9-5: Block Diagram of RB7:RB4 Pins
Any read or write of PORTB. This will end the mismatch condition.
Clear flag bit RBIF.
Note 1: I/O pins have diode protection to V
2: To enable weak pull-ups, set the appropriate TRIS bit(s)
3: In sleep mode the device is in Q1 state.
RB7:RB6 in serial programming mode
Data bus
WR TRIS
WR Port
RBPU
and clear the RBPU bit (OPTION<7>).
Set RBIF
From other
RB7:RB4 pins
(2)
RD TRIS
RD Port
Data Latch
TRIS Latch
D
D
CK
CK
Section 9. I/O Ports
Q
Q
DD
Q
Q
Latch
and V
EN
EN
D
D
TTL
Input
Buffer
SS
.
V
P
DD
weak
pull-up
RD Port
Buffer
I/O
pin
Q1
DS31009A-page 9-7
Q3
(1)
ST
9
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