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| PIC16F818_13 Datasheet, PDF (6/178 Pages) Microchip Technology – 18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Technology | |||
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PIC16F818/819
FIGURE 1-1:
PIC16F818/819 BLOCK DIAGRAM
Flash
Program
Memory
1K/2K x 14
Program
Bus
14
Instruction reg
13
Program Counter
Data Bus
8
8-Level Stack
(13-bit)
RAM
File
Registers
128/256 x 8
RAM Addr(1)
9
Addr MUX
Direct Addr 7
Indirect
8 Addr
FSR reg
Status reg
8
Instruction
Decode &
Control
RA7/OSC1/CLKI
RA6/OSC2/CLKO
Timing
Generation
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
3
MUX
ALU
8
W reg
PORTA
PORTB
RA0/AN0
RA1/AN1
RA2/AN2/VREF-
RA3/AN3/VREF+
RA4/AN4/T0CKI
RA5/MCLR/VPP
RA6/OSC2/CLKO
RA7/OSC1/CLKI
RB0/INT
RB1/SDI/SDA
RB2/SDO/CCP1
RB3/CCP1/PGM
RB4/SCK/SCL
RB5/SS
RB6/T1OSO/T1CKI/PGC
RB7/T1OSI/PGD
Timer0
MCLR VDD, VSS
Timer1
Timer2
Data EE
128/256 Bytes
10-bit, 5-channel
A/D
Synchronous
Serial Port
CCP1
Note 1: Higher order bits are from the Status register.
DS39598F-page 6
ï£ 2001-2013 Microchip Technology Inc.
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