Datasheet

PIC16C77X
DS30275B-page 6 Advance Information  1999-2013 Microchip Technology Inc.
FIGURE 1-2: PIC16C774 BLOCK DIAGRAM
EPROM
Program
Memory
4K x 14
13
Data Bus
8
14
Program
Bus
Instruction reg
Program Counter
8 Level Stack
(13-bit)
RAM
File
Registers
256 x 8
Direct Addr
7
RAM Addr
(1)
9
Addr MUX
Indirect
Addr
FSR reg
STATUS reg
MUX
ALU
W reg
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Instruction
Decode &
Control
OSC1/CLKIN
OSC2/CLKOUT
MCLR
VDD, VSS
PORTA
PORTB
PORTC
PORTD
PORTE
RA4/T0CKI
RA5/AN4
RB0/INT
RB7:RB4
RC0/T1OSO/T1CKI
RC1/T1OSI/CCP2
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
RD7/PSP7:RD0/PSP0
RE0/AN5/RD
RE1/AN6/WR
RE2/AN7/CS
8
8
Brown-out
Reset
Note 1: Higher order bits are from the STATUS register.
USART
CCP1,2
Synchronous
Timer0 Timer1 Timer2
Serial Port
RA3/AN3/VREF+/VRH
RA2/AN2/VREF-/VRL
RA1/AN1
RA0/AN0
Parallel Slave Port
8
3
Timing
Generation
12-bit
ADC
Precision
Reference
RB1/SS
RB2/AN8
RB3/AN9/LVDIN
Low-voltage
Detect
AVDD
AVSS
774.book Page 6 Tuesday, January 29, 2013 12:02 PM