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Diffstat (limited to 'i2c/rtc_epson_8564je/README')
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1 files changed, 34 insertions, 0 deletions
diff --git a/i2c/rtc_epson_8564je/README b/i2c/rtc_epson_8564je/README new file mode 100644 index 0000000..e87f4de --- /dev/null +++ b/i2c/rtc_epson_8564je/README @@ -0,0 +1,34 @@ +------------------------------------------------------------------------------- +Epson 8564JE I2C RTC +------------------------------------------------------------------------------- + +This an example capture of I2C traffic from/to an Epson 8564JE I2C RTC chip. + + +Logic analyzer setup +-------------------- + +The logic analyzer used for capturing was a ChronoVu LA8 at a sample rate +of 1MHz. The logic analyzer probes were connected to the RTC chip like this: + + Probe RTC chip pin + ------------------------ + 0 (green) SCL + 6 (blue) SDA + GND GND + + +Data +---- + +The device talking to the RTC was doing the following in an infinite loop: + + - Set the RTC to a specific date/time (Nov 22, 2011 - 04:03:54, weekday = 2). + + - Read back the current time from the RTC. + +The sigrok command line used was: + + sigrok-cli -d 0:samplerate=1mhz --samples 8388608 \ + -p '1=SCL,7=SDA,2-6,8' -o rtc_epson_8564je.sr + |