24C Datasheet, 24C 16kbyte Serial SMD EEPROM Datasheet, buy 24CSMD. 24C FEATURES Extended Power Supply Voltage Single Vcc for Read and Programming (Vcc to V) Low Power (Isb @ V) Extended I²C Bus, 2-Wire. Product Support – Data sheets and errata, application notes and . Microchip products meet the specification contained in their particular Microchip Data Sheet .
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CCS does not monitor this forum on a regular basis. Please do not post bug Reports on this forum. Send them to support ccsinfo. Fri Feb 28, 5: I am tring to use an ST M supplier farnell calls it 24C external eeprom chip with the But the chip will not initialise. I am vatasheet an expert user and was hoping to able to use this driver instead of writing my own code. Has anybody else encountered and fixed this problem?
Or does anyone have any suggestions as to mistakes i may have made. Fri Feb 28, 1: I have looked at the data sheet for the M, and it looks like the C sample driver should work OK. I don’t know why CCS gives out that file, without identifying the special chip that it works for. Fri Feb 28, 2: The MB comes in 5 different versions, etc.
24C (ETC) PDF技术资料下载 24C 供应信息 IC Datasheet 数据表 (1/8 页)
What PIC are you using? You could use 24f128. What version of the CCS compiler do you have? On the EEPROM, if you have the version that has “chip enable” pins, then what voltage levels do you have these pins connected to?
GND, Vcc, or un-connected? Are you using ICD? Especially, a common GND between the two chips. Is this your very first project, or have you made other projects work first, such as blinking a LED, etc. Fri Feb 28, 4: Do you have proper connections to Vcc and GND, for both: Especially, a common GND between: Is this your very first project, or have you made other: The resistors should be connected as shown in this schematic: Here’s the data sheet: It states on page 3, that they must be connected to Vcc or GND.
In your case, you should connect them to GND. Sat Mar 01, 4: You need a pull-up resistor on SDA: The resistors should be connected as shown: If i use a 4k7 resistor i will need a 68pF capicitor as well? Sat Mar 01, 1: That is the correct data sheet for a MBN6. If you had the chip that has 3 chip-enable lines, then it would be a “-BBN6”.
The users were the Beta testers unknowingly, until they figured it out. It probably didn’t get out of “Beta” meaning excessingly buggy until version 3. You should write very simple code with that version, and hope it works.
Don’t try using hardware i2c. Hope that CCS had the software i2c working with vs.
24C Datasheet(PDF) – List of Unclassifed Manufacturers
I don’t even have records for the Beta versions. So I can’t tell you if there was a problem for sure. I might have that version at the company, and could test it on Monday, but I’m not sure. In that schematic, the “Cbus capacitors” symbolize capacitance that’s inherent in the circuit.
It doesn’t represent capacitors that you’re supposed to add. So don’t add any. The bus capacitance in an i2c circuit is mainly due to the “input capacitance” of the i2c chips. For the SCL pin, it’s 6 pf max.
24C128 Datasheet PDF
You can’t do this with your version of the chip, because it doesn’t have the 3 chip-enable pins. Then multiply 8 chips x 8 pf each, which gives 64 pf. Add a few more pf for the output capacitance of the PIC pin that’s driving SDA, datashwet maybe a few more pf for stray capacitance. That’s the “Cbus” that they’re talking about.
Then you can refer to their graph in Figure 3, and see the maximum value of pull-up resistor that you can use. For example, at KHz, with 70 pf, you should use a resistor no larger in value than 4K. For pf, the largest resistor value can be 14K. But this is really a non-issue in most designs.
The only reason you would want to use the largest possible resistor is if you have a low-power design, and your primary concern is conserving the battery. Probably, most embedded applications only use the EEPROM for a short interval, compared to the overall time that they’re running.
So using the maximum sized pull-up resistor is dayasheet a non-issue. It’s much better to go for signal integrity.
So do that, and don’t add any capacitors. Mon Mar 03, 7: If you had the chip: The users were the Beta testers unknowingly,: It probably didn’t get out of: You should write very: Hope that CCS had the software i2c: I don’t even have records for the: So I can’t tell you if there was a problem: I might have that version at the company, and could: It doesn’t represent capacitors: For example, in Table 8: You can’t do this with your version of the chip, because: For pf, the largest resistor: So using the maximum sized pull-up resistor is: It’s much better to go for signal: Once i put the pull up resistors in it started to work.
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