R
EM3027
Timer Page - Registers TimLow, TimHigh
TimLow
TimHigh
Timer value (Low byte)
Timer value (High byte)
Temperature Page - Register Temp
Temp
Temperature (range from -60° C to 190°C with 0°C corresponding to a content of 60d)
EEPROM Data Page - Register EEData
EEData
General purpose EEPROM data bytes
EEPROM Control Page - Register EEctrl
R80k, R20k,
R5k, R1.5k
FD0, FD1
ThEn
Selects trickle charger resistors between VHigh and VBack
Selects clock frequency at IRQ/CLKOUT pin.
Enables thermometer (‘0’ = disabled; ‘1’ = enabled)
Selects thermometer activation period (‘0’ = 1 second; ‘1’ = 16 seconds)
ThPer
EEPROM Control Page - Register XtalOffset
XtalOffset
Crystal frequency deviation at Turnover temperature TO in ppm. Example: value 63d is related to
60 ppm.
XtalOffset=1.05*XtalOffsetreal
where XtalOffsetreal is real value of crystal frequency deviation at Turnover temperature of the used crystal in ppm.
Note: Coefficient 1.05 (exactly 1.048576) is the result of the internally used frequency compensating method.
EEPROM Control Page - Register Qcoef
Qcoef
Thermal quadratic coefficient of the crystal. Example: value 151d is related to 0.035 ppm/°C²,
Qcoef = 4096 x 1.05 x QCoefreal
,
where Qcoefreal is real value of thermal quadratic coefficient of the crystal in ppm/°C².
EEPROM Control Page - Register TurnOver
TurnOver
Turnover temperature of the crystal (values 0 to 63d are related to temperature 4 to 67 °C).
Example: value 21d is related to 25°C.
T0 = T0_real – 4,
where T0_real is real value of Turnover temperature of the crystal in °C.
RAM Page - Register RAMdata
RAMdata General purpose RAM data bytes
Copyright © 2009, EM Microelectronic-Marin SA
12/09 – rev D
www.emmicroelectronic.com
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EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
