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Diffstat (limited to 'i2c/rtc_dallas_ds3231/README')
| -rw-r--r-- | i2c/rtc_dallas_ds3231/README | 48 |
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diff --git a/i2c/rtc_dallas_ds3231/README b/i2c/rtc_dallas_ds3231/README new file mode 100644 index 0000000..12c783e --- /dev/null +++ b/i2c/rtc_dallas_ds3231/README @@ -0,0 +1,48 @@ +------------------------------------------------------------------------------- +Maxim Integrated DS3231 RTC +------------------------------------------------------------------------------- + +Details: + - DS3231 datasheet: https://datasheets.maximintegrated.com/en/ds/DS3231.pdf + + +Logic analyzer setup +-------------------- + +The logic analyzer used was Geeetech Mini Board Cypress FX2(LP) eval board +with fx2lafw firmware (at 4MHz): + + Probe DS3231 pin + ------------------------- + 0 SCL + 1 SDA + + +ds3231_ex1.sr +---------------------- + +The file provides reading/writing of time keeping registers as well as +control, control/status and temperature registers of the RTC chip, which +was setup to 24-hours mode: + +- Read Control register +- Write Control register - disable alarms +- Read Control/Status register +- Write Control/Status register - clear alarm's flags +- Write Alarm 1 registers - set Alarm 1 at every 1st date +- Write Alarm 2 registers - set Alarm 2 at every minute +- Read date/time +- Read temperature (MSB) + + +ds3231_ex2.sr +---------------------- + +The file provides reading/writing of time keeping registers as well as +control/status and temperature registers of the RTC chip, which was setup +to 24-hours mode and after Alarm 2 occured: + +- Read Control/Status register +- Write Control/Status register - clear alarm flag +- Read date/time +- Read temperature (MSB) |