PIC16F819 Microchip Technology Inc., PIC16F819 Datasheet - Page 43

• Manufacturer Part Number: PIC16F819
• Description: 18/20-pin Enhanced Flash Microcontrollers With Nanowatt Technology
• Manufacturer: Microchip Technology Inc.

FIGURE 5-5:
FIGURE 5-6:
 2004 Microchip Technology Inc.
MCLR Circuit
Data
Bus
RD Port
Note 1: I/O pins have protection diodes to V
Data
Bus
WR
PORTA
WR
TRISA
RD PORTA
2: CLKO signal is 1/4 of the F
TRIS Latch
D
Data Latch
D
CK
CK
BLOCK DIAGRAM OF RA5/MCLR/V
BLOCK DIAGRAM OF RA6/OSC2/CLKO PIN
RD TRISA
CLKO (F
Q
Q
Q
Q
RD TRIS
(F
OSC
OSC
MCLRE
= 1x1)
Q
/4)
V
(F
SS
OSC
OSC
EN
MCLR Filter
= 1x0,011)
D
frequency.
Q
DD
and V
From OSC1
EN
D
SS
.
(F
V
V
Schmitt Trigger
Input Buffer
OSC
P
N
DD
SS
Schmitt Trigger
Input Buffer
PP
= 1x0,011)
Oscillator
PIN
Circuit
V
V
Schmitt Trigger
Buffer
P
N
DD
SS
MCLRE
PIC16F818/819
V
V
DD
SS
V
SS
RA6/OSC2/CLKO
RA5/MCLR/V
DS39598E-page 41
PP