What is the correct way to interface a 5v PIC input/output to a 3.3v component? Asuming the pin will change from input to output throughout the program.
I will make a tutorial for this chip but need a correct circuit. Currently I am using 47nf cap parellel to a 4.7kohm resistor direct from pin to pin. Matt. On Oct 28, 5:43 am, William <[email protected]> wrote: > Hi Matt, > > Nice to hear from you! > > How about "sr23_" for prefix to the names? And I suppose you'll put > the library under include/storage/sram/sr23k256.jal ? > > Take care: that is a lower-voltage part (not 5 volt tolerant), and > you'll need a battery if you want persistent storage. Many picmicros > will operate at lower voltages, but sometimes only at a reduced > frequency. Also some older ICSP flash-burners will not work at the > lower voltages. The ICD2 is fine, and I'm sure many others are also. > > William > > On Oct 28, 2:26 am, mattschinkel <[email protected]> wrote: > > > > > I am creating a lib for Microchip's 23k256 SRAM (costs about $1) > > > similar to 24LC256 EEPROM but much much faster (up to 20MHz) and uses > > SPI bus instead of I2C (spi mode_00) > > >http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en539039 > > > What should I name the variables & procedures since I cannot use > > numbers as first characters in procedures & vars. > > > eg: > > > 23k256_init() is > > > const byte 23K256_READ = 0b_0000_0011 -- Read data from memory > > array beginning at selected address > > const byte 23K256_WRITE = 0b_0000_0010 -- Write data to memory array > > beginning at selected address > > const byte 23K256_READ_STATUS = 0b_0000_0101 -- Read status > > register > > const byte 23K256_WRITE_SETTINGS = 0b_0000_0001 -- Write settings > > register > > > I'm an SPI kind of guy :o) > > Matt.- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/jallib?hl=en -~----------~----~----~----~------~----~------~--~---
