PIC18C658 MICROCHIP [Microchip Technology], PIC18C658 Datasheet - Page 90

• Manufacturer Part Number: PIC18C658
• Description: High-Performance Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18CXX8
FIGURE 8-2:
TABLE 8-1:
TABLE 8-2:
DS30475A-page 90
RA0/AN0
RA1/AN1
RA2/AN2/V
RA3/AN3/V
RA4/T0CKI
RA5/SS/AN4/LVDIN
OSC2/CLKO/RA6
Legend: TTL = TTL input, ST = Schmitt Trigger input, OD = Open Drain
PORTA
LATA
TRISA
ADCON1
Legend: x = unknown, u = unchanged, - = unimplemented locations read as '0'.
WR TRISA
WR LATA
or
WR PORTA
Note 1: I/O pin has diode protection to V
Name
Data
Bus
RD PORTA
TMR0 Clock Input
Name
Shaded cells are not used by PORTA.
REF
REF
Bit 7
—
—
—
—
-
+
TRIS Latch
Data Latch
D
D
RA4/T0CKI PIN BLOCK
DIAGRAM
CK
CK
PORTA FUNCTIONS
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
RD LATA
RD TRISA
Latch A Data Output Register
PORTA Data Direction Register
Bit 6
RA6
Q
Q
Q
Q
—
Bit#
bit0
bit1
bit2
bit3
bit4
bit5
bit6
Q
VCFG1 VCFG0 PCFG3
Bit 5
RA5
EN
Schmitt
Trigger
Input
Buffer
SS
TTL
TTL
TTL
TTL
ST/OD
TTL
TTL
EN
Buffer
D
only.
V
N
SS
Bit 4
RA4
Advanced Information
Input/output or analog input or V
Input/output or analog input or V
input, or low voltage detect input.
Input/output or analog input.
Input/output or analog input.
Input/output or external clock input for Timer0 output is open drain type.
Input/output or slave select input for synchronous serial port or analog
OSC2 or clock output or I/O pin.
I/O Pin
Bit 3
RA3
(1)
PCFG2
Bit 2
RA2
FIGURE 8-3:
WR LATA
or
WR PORTA
WR
TRISA
Data
Bus
Note 1:
Data Bus
Data Bus
RD PORTA
ECRA6 or
RCRA6 Enable
PCFG1
Bit 1
RA1
RD TRISA
TRIS Latch
I/O pins have diode protection to V
Data Latch
D
D
CK
CK
Function
RD LATA
REF
REF
PCFG0 --00 0000 --uu uuuu
-.
+.
RA6 BLOCK DIAGRAM
Q
Q
Q
Q
Bit 0
RA0
 2000 Microchip Technology Inc.
-x0x 0000 -uuu uuuu
-xxx xxxx -uuu uuuu
-111 1111 -111 1111
ECRA6 or
RCRA6
Enable
Value on
POR,
BOR
Q
DD
V
V
P
N
EN
SS
DD
and V
D
Value on all
RESETS
other
SS
I/O Pin
TTL
Input
Buffer
.
(1)