PIC18F6680-I/L Microchip Technology, PIC18F6680-I/L Datasheet - Page 141

• Manufacturer Part Number: PIC18F6680-I/L
• Description: Microcontrollers (MCU) 64KB 3328 RAM 52 I/O
• Manufacturer: Microchip Technology

Specifications of PIC18F6680-I/L

• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3.25 KB
• Interface Type: I2C/SPI/AUSART/CAN
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 53
• Number Of Timers: 5
• Operating Supply Voltage: 4.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12-ch x 10-bit
• Program Memory Type: Flash
• Program Memory Size: 64 KB
• Package / Case: PLCC-68
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.6
PORTF is an 8-bit wide, bidirectional port. The corre-
sponding data direction register is TRISF. Setting a
TRISF bit (= 1) will make the corresponding PORTF pin
an input (i.e., put the corresponding output driver in a
high-impedance mode). Clearing a TRISF bit (= 0) will
make the corresponding PORTF pin an output (i.e., put
the contents of the output latch on the selected pin).
Read-modify-write operations on the LATF register
read and write the latched output value for PORTF.
PORTF is multiplexed with several analog peripheral
functions, including the A/D converter inputs and
comparator inputs, outputs, and voltage reference.
FIGURE 10-13:
 2004 Microchip Technology Inc.
Note 1: On a Power-on Reset, the RF6:RF0 pins
2: To configure PORTF as digital I/O, turn off
PORTF, LATF and TRISF Registers
are configured as inputs and read as ‘0’.
comparators and set ADCON1 value.
Note 1: I/O pins have diode protection to V
Port/Comparator Select
Comparator Data Out
Data Bus
WR LATF or
WR PORTF
WR TRISF
RD PORTF
To A/D Converter
PORTF RF1/AN6/C2OUT AND RF2/AN7/C1OUT PINS BLOCK DIAGRAM
TRIS Latch
Data Latch
D
D
CK
RD TRISF
CK
RD LATF
Q
Q
Q
Q
PIC18F6585/8585/6680/8680
0
1
DD
and V
Q
EXAMPLE 10-6:
EN
SS
CLRF
CLRF
MOVLW
MOVWF
MOVLW
MOVWF
MOVLW
MOVWF
D
.
PORTF
LATF
07h
CMCON
0Fh
ADCON1
0CFh
TRISF
V
P
N
V
Schmitt
Trigger
Analog
Input
Mode
DD
SS
INITIALIZING PORTF
; Initialize PORTF by
; clearing output
; data latches
; Alternate method
; to clear output
; data latches
;
; Turn off comparators
;
; Set PORTF as digital I/O
; Value used to
; initialize data
; direction
; Set RF3:RF0 as inputs
; RF5:RF4 as outputs
; RF7:RF6 as inputs
DS30491C-page 139
I/O pin