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PIC16F87 Datasheet(PDF) 65 Page - Microchip Technology

Part # PIC16F87
Description  18/20/28-Pin Enhanced FLASH Microcontrollers with nanoWatt Technology
PDF  214 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F87 Datasheet(HTML) 65 Page - Microchip Technology

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 2003 Microchip Technology Inc.
Preliminary
DS30487B-page 63
PIC16F87/88
FIGURE 5-12:
BLOCK DIAGRAM OF RB4 PIN
Data Latch
From Other
RBPU(2)
P
VDD
I/O pin(1)
Q
D
CK
Q
D
CK
QD
EN
QD
EN
Data Bus
WR
WR
Set RBIF
TRIS Latch
RD TRISB
RD PORTB
RB7:RB4 pins
Weak
Pull-up
RD PORTB
Latch
TTL
Input
Buffer
Q3
Q1
PORTB
Note 1:
I/O pins have diode protection to VDD and VSS.
2:
To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit.
3:
The SCL Schmitt conforms to the I2C™ specification.
SCK
SCK/SCL
1
0
PORT/SSPEN
SCL(3)
P
N
VSS
VDD
SCL Drive
TRISB



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