设置工作电压到1.8V

1万 · 2020-10-14 21:43

PIC16 LF 18346 单片机怎么设置工作电压到1.8V

设置了 FVRCON = 0XAA；
设置了 OSCFRQ = 0x06; //16MHZ
#pragma config RSTOSC = HFINT1 // Power-up default value for COSC bits->HFINTOSC (1MHz)
#pragma config BOREN = OFF // Brown-out Reset Enable bits->Brown-out Reset enabled, SBOREN bit ignored
#pragma config BORV = LOW // Brown-out Reset Voltage selection bit->Brown-out voltage (Vbor) set to 2.45V

1.8V的电源接上，不能正常跑起来

1万 · 2020-10-14 21:47

检查一下配置字的BOR, 看看是不是它设置的太高了....

1万 · 2020-10-14 21:50

#pragma config BORV = LOW // Brown-out Reset Voltage selection bit->Brown-out voltage (Vbor) set to 2.45V

2万 · 2020-10-14 21:54

工作模式配置检查一下看看

2万 · 2020-10-14 21:57

2.45V就复位了, 芯片当然跑不起来..

1万 · 2020-10-14 22:03

你可以试着把它disable,应该就可以在1.8V下跑起来了.

1万 · 2020-10-14 22:07

BOREN DISABLE还是不能跑起来...

2万 · 2020-10-14 22:10

把所有的配置字贴上来看一下/

1万 · 2020-10-14 22:14

// CONFIG1
#pragma config FEXTOSC = OFF // FEXTOSC External Oscillator mode Selection bits->Oscillator not enabled
#pragma config RSTOSC = HFINT1 // Power-up default value for COSC bits->HFINTOSC (1MHz)
#pragma config CLKOUTEN = OFF // Clock Out Enable bit->CLKOUT function is disabled; I/O or oscillator function on OSC2
#pragma config CSWEN = ON // Clock Switch Enable bit->Writing to NOSC and NDIV is allowed
#pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable->Fail-Safe Clock Monitor is enabled

// CONFIG2
#pragma config MCLRE = ON // Master Clear Enable bit->MCLR/VPP pin function is MCLR; Weak pull-up enabled
#pragma config PWRTE = ON // Power-up Timer Enable bit->PWRT enabled
#pragma config WDTE = SWDTEN // Watchdog Timer Enable bits->WDT controlled by the SWDTEN bit in the WDTCON register
#pragma config LPBOREN = OFF // Low-power BOR enable bit->ULPBOR disabled
#pragma config BOREN = OFF // Brown-out Reset Enable bits->Brown-out Reset enabled, SBOREN bit ignored
#pragma config BORV = LOW // Brown-out Reset Voltage selection bit->Brown-out voltage (Vbor) set to 2.45V
#pragma config PPS1WAY = ON // PPSLOCK bit One-Way Set Enable bit->The PPSLOCK bit can be cleared and set only once; PPS registers remain locked after one clear/set cycle
#pragma config STVREN = ON // Stack Overflow/Underflow Reset Enable bit->Stack Overflow or Underflow will cause a Reset
#pragma config DEBUG = OFF // Debugger enable bit->Background debugger disabled

// CONFIG3
#pragma config WRT = OFF // User NVM self-write protection bits->Write protection off
#pragma config LVP = ON // Low Voltage Programming Enable bit->Low Voltage programming enabled. MCLR/VPP pin function is MCLR. MCLRE configuration bit is ignored.

// CONFIG4
#pragma config CP = OFF // User NVM Program Memory Code Protection bit->User NVM code protection disabled
#pragma config CPD = OFF // Data NVM Memory Code Protection bit->Data NVM code protection disabled

2万 · 2020-10-14 22:17

试试这个看看?

// CONFIG1
#pragma config FEXTOSC = OFF // FEXTOSC External Oscillator mode Selection bits->Oscillator not enabled
#pragma config RSTOSC = HFINT1 // Power-up default value for COSC bits->HFINTOSC (1MHz)
#pragma config CLKOUTEN = OFF // Clock Out Enable bit->CLKOUT function is disabled; I/O or oscillator function on OSC2
#pragma config CSWEN = ON // Clock Switch Enable bit->Writing to NOSC and NDIV is allowed
#pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable->Fail-Safe Clock Monitor is enabled

// CONFIG2
#pragma config MCLRE = ON // Master Clear Enable bit->MCLR/VPP pin function is MCLR; Weak pull-up enabled
#pragma config PWRTE = OFF // Power-up Timer Enable bit->PWRT disabled
#pragma config WDTE = OFF // Watchdog Timer Enable bits->WDT disabled; SWDTEN is ignored
#pragma config LPBOREN = OFF // Low-power BOR enable bit->ULPBOR disabled
#pragma config BOREN = OFF // Brown-out Reset Enable bits->Brown-out Reset disabled
#pragma config BORV = LOW // Brown-out Reset Voltage selection bit->Brown-out voltage (Vbor) set to 2.45V
#pragma config PPS1WAY = OFF // PPSLOCK bit One-Way Set Enable bit->The PPSLOCK bit can be set and cleared repeatedly (subject to the unlock sequence)
#pragma config STVREN = ON // Stack Overflow/Underflow Reset Enable bit->Stack Overflow or Underflow will cause a Reset
#pragma config DEBUG = OFF // Debugger enable bit->Background debugger disabled

// CONFIG3
#pragma config WRT = OFF // User NVM self-write protection bits->Write protection off
#pragma config LVP = OFF // Low Voltage Programming Enable bit->High Voltage on MCLR/VPP must be used for programming.

// CONFIG4
#pragma config CP = OFF // User NVM Program Memory Code Protection bit->User NVM code protection disabled
#pragma config CPD = OFF // Data NVM Memory Code Protection bit->Data NVM code protection disabled

1万 · 2020-10-14 22:23

• Operating Voltage Range:
- 1.8V to 3.6V (PIC16LF18326/18346)
- 2.3V to 5.5V (PIC16F18326/18346)
楼主你是不带L的吧?

2万 · 2020-10-14 22:26

老铁, 你这才是关键问题!!!

1万 · 2020-10-14 22:28

我的是PIC16LF18346的, 带L的。

1万 · 2020-10-14 22:31

改了后一样没有效果。

2万 · 2020-10-14 22:42

配置字设置正确了, 剩下的就是你的程序的问题了...

2万 · 2020-10-14 22:46

你看看会不会是程序问题?

2万 · 2020-10-14 22:49

或者这样, 写个最小程序, 用外置可调电源供电, 写个IO口翻转程序, 从3.3V往下调, 看看到多少电压了开始不正常.

1万 · 2020-10-14 22:52

1.91--1.92V的电压时候，可以点亮的。

2万 · 2020-10-14 22:57

你用来驱动LED的啊?
外面不接东西, 用示波器测量翻转好了..

1万 · 2020-10-14 23:01

上电就有指示灯的，不亮就没好吧？