参数资料
型号: PIC18F6620-E/PT
厂商: Microchip Technology
文件页数: 23/165页
文件大小: 0K
描述: IC PIC MCU FLASH 32KX16 64TQFP
产品培训模块: Asynchronous Stimulus
标准包装: 160
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 25MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,LVD,POR,PWM,WDT
输入/输出数: 52
程序存储器容量: 64KB(32K x 16)
程序存储器类型: 闪存
EEPROM 大小: 1K x 8
RAM 容量: 3.75K x 8
电压 - 电源 (Vcc/Vdd): 4.2 V ~ 5.5 V
数据转换器: A/D 12x10b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 64-TQFP
包装: 托盘
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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