Sorry for my wrong part number.
My hardware consists of an Arduino FIO, DeadOn RTC -DS3234 breakout, and breakout board for micro SD transflash of Sparkfun. I tried with a Arduino Pro 3.3v 8MHz, DeadOn RTC -DS3234 breakout , and a micro SD shield . But it does not work as well. I configured the two SPI devices shares D11, D12, and D13 pins , and one's CS is D10 pin and the other's CS is D9.
DeadOn RTC-DS3234- https://www.sparkfun.com/products/10160
micro SD transflash - SparkFun microSD Transflash Breakout - BOB-00544 - SparkFun Electronics
Please help me.
Byungsoon
sd_rtc3234_0521.ino (4.87 KB)