Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
In battery powered applications, BrownOut reset is most important preporty to protect low voltage levels.
I watch my circuit by simulating battery voltage with Adjustable LDO regulator. The battery voltage is typicaly 3,7V to 4,2V in application. For MCU supply there is a adjustable MCP1726 LDO...
Hi!
I am using Microchip PIC18F26K22 MCU.
I have a battery powered board. There is a Li-Ion battery cell (because of GSM module). The voltage is from 4.2V to 3.7V in application.
MCU supply voltage is 3V. From battery to MCU, there is LDO chip between them. Also there is a serial schottky...
Thanks for your reply "FvM"
I look the datasheet and find this:
So it is not possible to change CPx bits without a chip erase. Than the data will cleared which i want to get by changing CPx bits to disable state.
Hi!
There is a device with pic18f67k22. In MPLAB, with pickit3, i am trying to read pic.
Code area fills with 0x00 from address 0x0 to 0x1FFFFF.
But i can see configuration data from menu "Configure->Configuration Bits" in MPLAB. Also i can change bits by removing the tick from "Configure Bits...
Thanks "zia"!
ok, i cant debug at64mhz but why debugger makes PLL disable when i press "RUN" ???
(i add OSCTUNEbits.PLLEN=1; in while(1) than it is solved.)
40mhz is the limit for debug? or pickit3?
my circuit runs perfect at 64mhz ( 16mhz intosc and 4x PLL )
Some times, i need to see some SFR values. So, i want to use DEBUG mode.
I am pushing HALT button. First debugger says unable to get PC value. Than i press run button, microchip runs but...
Hello!
There is a problem with my microchip pic18 circuit.
I am using internal oscillator and enabled PLL (4x multiplier)
#pragma config FOSC = INTIO2 // Oscillator: Internal RC oscillator
#pragma config PLLCFG = ON // PLL x4 Enable bit: Enabled
In my initialization of board i...
You can use M.A.L. ( Microchip Application Libraries ) . After you install that, you can use TCP-IP stacks ( For example TCPIP\Demo App\C18-PICDN2_ETH97.mcp ) . In the M.A.L., there is "MDD File System-SD Card" project. It drives sd or mmc via SPI bus!
---------- Post added at 18:12 ----------...
Voltage is perfect! I pick-up VCCIO pin to free by re-soldering. The 3V3 is about 3.26V (fix)
I re-solder all pull-up resistors. Also, now there is 4.4V on VCCIO pin :S
YES, my schematics like that expect, my 3V3_LDO and VCCIO pins connected together! MY FTDI is working, UART working.... THE PROBLEM IS THAT WHEN VCCIO AND 3V3_OUT together, I measure 4.2V. When i re-solder VCCIO pin, The voltage is 3.25. I see 4.4V on VCCIO pin when it is free!!
HELLO TO EVERYONE!
I tried to use, BUS POWERED USB to UART with FT232RL. The design is so simple but, MY 3.3V output is over 4.2V. So, i re-solder 3V3 and VCCIO pins from PCB. I measured with AVO meter. The LDO output pin (3V3) is 3,26V. IT is OK! But THE VCCIO pin seems 4.4V!!!!!!
I soldered...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
