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PIC12F519-E/MS Datasheet(PDF) 27 Page - Microchip Technology

Part # PIC12F519-E/MS
Description  8-Pin, 8-Bit Flash Microcontrollers
PDF  96 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC12F519-E/MS Datasheet(HTML) 27 Page - Microchip Technology

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© 2008 Microchip Technology Inc.
DS41319B-page 25
PIC12F519
6.3
I/O Interfacing
The equivalent circuit for an I/O port pin is shown in
Figure 6-1. All port pins, except GP3 which is input
only, may be used for both input and output operations.
For input operations, these ports are non-latching. Any
input must be present until read by an input instruction
(e.g., MOVF GPIO, W). The outputs are latched and
remain unchanged until the output latch is rewritten. To
use a port pin as output, the corresponding direction
control bit in TRISGPIO must be cleared (= 0). For use
as an input, the corresponding TRISGPIO bit must be
set. Any I/O pin (except GP3) can be programmed
individually as input or output.
FIGURE 6-1:
PIC12F519 EQUIVALENT CIRCUIT FOR I/O PINS – GP0/GP1
VDD
VDD
I/O
Pin
VSS
Pin Change
Q
D
Wake-up
on change
Latch
Q
D
Q
Q
D
CK
Q
Data Latch
TRIS Latch
RD Port
TRIS ‘F’
WREG
WR
Data
GPPU
CK
CK
GP0/ICSPDAT
GP1/ICSPCLK
• General purpose I/O
• General purpose I/O
• In-Circuit Serial Programming™ data
• In-circuit Serial Programming™ clock
• Wake-up on input change trigger
• Wake-up on input change trigger



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