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| PIC16F818_13 Datasheet, PDF (42/178 Pages) Microchip Technology – 18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Technology | |||
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PIC16F818/819
FIGURE 5-7:
BLOCK DIAGRAM OF RA7/OSC1/CLKI PIN
From OSC2
Oscillator
Circuit
Data
Bus
WR
PORTA
WR
TRISA
D
Q
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
(FOSC = 011)
VDD
P
N
FOSC = 10x
VSS
RD TRISA
Q
D
EN
RD PORTA
Schmitt Trigger
Input Buffer
FOSC = 10x
Note 1: I/O pins have protection diodes to VDD and VSS.
VDD
RA7/OSC1/CLKI
VSS
DS39598F-page 42
ï£ 2001-2013 Microchip Technology Inc.
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