參數(shù)資料
型號: PIC18F8720T-E/PT
廠商: Microchip Technology
文件頁數(shù): 23/165頁
文件大?。?/td> 0K
描述: IC PIC MCU FLASH 64KX16 80TQFP
標準包裝: 1,200
系列: PIC® 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 25MHz
連通性: EBI/EMI,I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,LVD,POR,PWM,WDT
輸入/輸出數(shù): 68
程序存儲器容量: 128KB(64K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量: 3.75K x 8
電壓 - 電源 (Vcc/Vdd): 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 16x10b
振蕩器型: 外部
工作溫度: -40°C ~ 125°C
封裝/外殼: 80-TQFP
包裝: 帶卷 (TR)
配用: XLT80PT3-ND - SOCKET TRAN ICE 80MQFP/TQFP
AC164320-ND - MODULE SKT MPLAB PM3 80TQFP
AC174011-ND - MODULE SKT PROMATEII 80TQFP
2004 Microchip Technology Inc.
DS39609B-page 117
PIC18F6520/8520/6620/8620/6720/8720
10.6
PORTF, LATF and TRISF Registers
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.
EXAMPLE 10-6:
INITIALIZING PORTF
FIGURE 10-13:
PORTF RF1/AN6/C2OUT, RF2/AN7/C1OUT PINS BLOCK DIAGRAM
Note 1: On a Power-on Reset, the RF6:RF0 pins
are configured as inputs and read as ‘0’.
2: To configure PORTF as digital I/O, turn off
comparators and set ADCON1 value.
CLRF
PORTF
; Initialize PORTF by
; clearing output
; data latches
CLRF
LATF
; Alternate method
; to clear output
; data latches
MOVLW
0x07
;
MOVWF
CMCON
; Turn off comparators
MOVLW
0x0F
;
MOVWF
ADCON1
; Set PORTF as digital I/O
MOVLW
0xCF
; Value used to
; initialize data
; direction
MOVWF
TRISF
; Set RF3:RF0 as inputs
; RF5:RF4 as outputs
; RF7:RF6 as inputs
Port/Comparator Select
Data Bus
WR LATF
WR TRISF
Data Latch
TRIS Latch
RD TRISF
Q
D
Q
CK
QD
EN
Comparator Data Out
0
1
Q
D
Q
CK
P
N
VDD
VSS
RD PORTF
I/O pin
or
WR PORTF
RD LATF
Schmitt
Trigger
Note
1:
I/O pins have diode protection to VDD and VSS.
Analog
Input
Mode
To A/D Converter
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