NAD M27 Service Manual page 8

PIC18F26K20
MCU BOARD
Table Pointer<21>
inc/dec logic
21
20
Address Latch
Program Memory
(8/16/32/64 Kbytes)
Data Latch
8
Instruction Bus <16>
Internal
(3)
OSC1
Oscillator
Block
(3)
OSC2
LFINTOSC
Oscillator
T1OSI
16 MHz
Oscillator
T1OSO
Single-Supply
(2)
MCLR
Programming
In-Circuit
V , V
DD SS
Debugger
BOR
EEPROM
HLVD
FVR
Comparator
CV
REF
Note 1: CCP2 is multiplexed with RC1 when Configuration bit CCP2MX is set, or RB3 when CCP2MX is not set.
2: RE3 is only available when MCLR functionality is disabled.
3: OSC1/CLKIN and OSC2/CLKOUT are only available in select oscillator modes and when these pins are not being used as digital I/O.
Refer to Section 2.0 "Oscillator Module (With Fail-Safe Clock Monitor)" for additional information.
Data Bus<8>
8 8
PCLATH
PCLATU
PCU PCH PCL
Program Counter
31-Level Stack
STKPTR
Table Latch
ROM Latch
IR
State machine
Instruction
control signals
Decode and
Control
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
Fail-Safe
Clock Monitor
Data
Timer0 Timer1
MSSP
ECCP1 CCP2
Data Latch
Data Memory
Address Latch
12
Data Address<12>
4 12 4
BSR Access
FSR0
Bank
FSR1
FSR2
12
inc/dec
logic
Address
Decode
8
PRODH PRODL
8 x 8 Multiply
3
8
W
BITOP
8
8
8
8
8
ALU<8>
8
Precision
FVR
Band Gap
Reference
Timer2 Timer3
ADC FVR
EUSART
10-bit
8
PORTA
RA0/AN0
RA1/AN1
RA2/AN2/V -/CV
REF
RA3/AN3/V +
REF
RA4/T0CKI/C1OUT
RA5/AN4/SS/HLVDIN/C2OUT
(3)
OSC2/CLKOUT /RA6
(3)
OSC1/CLKIN /RA7
PORTB
RB0/INT0/FLT0/AN12
RB1/INT1/AN10
RB2/INT2/AN8
(1)
RB3/AN9/CCP2
RB4/KBI0/AN11
RB5/KBI1/PGM
RB6/KBI2/PGC
RB7/KBI3/PGD
PORTC
RC0/T1OSO/T13CKI
(1)
RC1/T1OSI/CCP2
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
PORTE
(2)
MCLR/V /RE3
PP
REF