参数资料
型号: DSPIC30F3013-20I/SP
厂商: Microchip Technology
文件页数: 8/161页
文件大小: 0K
描述: IC DSPIC MCU/DSP 24K 28DIP
产品培训模块: Serial Communications using dsPIC30F I2C
Serial Communications using dsPIC30F SPI
Serial Communications using dsPIC30F UART
dsPIC30F 12 bit ADC - Part 2
dsPIC30F Addressing Modes - Part 1
dsPIC30F Architecture - Part 1
dsPIC30F DSP Engine & ALU
dsPIC30F Interrupts
dsPIC30F Motor Control PWM
dsPIC Timers
Asynchronous Stimulus
dsPIC30F Addressing Modes - Part 2
dsPIC30F Architecture - Part 2
dsPIC30F 12-bit ADC Part 1
标准包装: 15
系列: dsPIC™ 30F
核心处理器: dsPIC
芯体尺寸: 16-位
速度: 20 MIPS
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 20
程序存储器容量: 24KB(8K x 24)
程序存储器类型: 闪存
EEPROM 大小: 1K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 2.5 V ~ 5.5 V
数据转换器: A/D 10x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 28-DIP(0.300",7.62mm)
包装: 管件
其它名称: DSPIC30F301320ISP
2011 Microchip Technology Inc.
DS39932D-page 135
PIC18F46J11 FAMILY
10.2
PORTA, TRISA and LATA Registers
PORTA is a 7-bit wide, bidirectional port. It may
function as a 5-bit port, depending on the oscillator
mode selected. Setting a TRISA bit (= 1) will make the
corresponding PORTA pin an input (i.e., put the
corresponding output driver in a high-impedance
mode). Clearing a TRISA bit (= 0) will make the
corresponding PORTA pin an output (i.e., put the
contents of the output latch on the selected pin).
Reading the PORTA register reads the status of the
pins, whereas writing to it, will write to the port latch.
The Data Latch (LATA) register is also memory mapped.
Read-modify-write operations on the LATA register read
and write the latched output value for PORTA.
The other PORTA pins are multiplexed with analog
inputs, the analog VREF+ and VREF- inputs and the com-
parator voltage reference output. The operation of pins,
RA<3:0> and RA5, as A/D converter inputs is selected
by clearing or setting the control bits in the ANCON0
register (A/D Port Configuration Register 0).
Pins, RA0 and RA3, may also be used as comparator
inputs by setting the appropriate bits in the CMCON reg-
ister. To use RA<3:0> as digital inputs, it is also
necessary to turn off the comparators.
All PORTA pins have TTL input levels and full CMOS
output drivers.
The TRISA register controls the direction of the PORTA
pins, even when they are being used as analog inputs.
The user must ensure the bits in the TRISA register are
maintained set when using them as analog inputs.
EXAMPLE 10-2:
INITIALIZING PORTA
Note:
On a Power-on Reset (POR), RA5 and
RA<3:0> are configured as analog inputs
and read as ‘0’.
CLRF
LATA
; Initialize LATA
; to clear output
; data latches
MOVLB
0x0F
; ANCONx register not in
; Access Bank
MOVLW
0x0F
; Configure A/D
MOVWF
ANCON0
; for digital inputs
MOVLW
0xCF
; Value used to
; initialize data
; direction
MOVWF
TRISA
; Set RA<3:0> as inputs
; RA<5:4> as outputs
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