DS1307+ / EEPROM sharing Pull-Up Resistors

MacTuxLin · 2010-09-23 10:29

Hello All,

Need an advice regarding RTC & EEPROM on the same SDA & SCL line. Each requires a 10k pull-up resistor to 3v3. Will there be any problem if I just implement 1 10k on each SDA & SCL line instead (picture)?

Thanks.

JonnyMac · 2010-09-23 10:50

Yes, that's fine. Attached is a pic of a DS1307 in my Propeller Platform. You can see the shared pull-ups between the boot EEPROM and the DS1307.

tonyp12 · 2010-09-23 12:47

It's a bus, so only use one resistor to 3.3v.
using two would be the same as using a single resistor with half the ohm value.

MacTuxLin · 2010-09-23 18:42

Thank you very much JonnyMac & Tonyyp12

DS1307+ / EEPROM sharing Pull-Up Resistors

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