Eddy DK Programmer Guide
43
2.4.5.4.
RTC
- DS1340 (Dallas, I2C interface)
- 12.5pF load capacitance crystal must be used. (Refer to Crystal Spec below)
- Do not use another RTC Chip.
- Backup Battery: CR2032 (235mAh) Lithium Battery.
DS1340 Crystal Specifications
Parameter
Symbol
MIN
TYP
MAX
Units
Normal Frequency
fo
32.768
KHz
Series Resistance
ESR
45,60
KΩ
Load Capacitance
CL
12.5
pF
2.4.5.5.
Temp Sensor
AD0(PC0)에 National LM50
2.4.5.6.
Light Sensor
BH1600FVC (Rohm)
The Output voltage is caculated as below
Viout = 0.6 x10-6 x Ev x R1
Where, Viout = IOUT output voltage [V]
Ev = lilluminance of the ALS(Ambient Light Sensor) surface [lx]
R1 = IOUT output resistor [Ω]
