27220 Parallax Inc, 27220 Datasheet - Page 177

• Manufacturer Part Number: 27220
• Description: BOOK STAMPWORKS
• Manufacturer: Parallax Inc

Specifications of 27220

• Accessory Type: Booklet
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: StampWorks
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable

Moving Forward · Page 167
THi
TLo
In the program the constants
and
are used to set the high and low
temperature thresholds. These values are expressed in whole degrees Fahrenheit,
and are converted to half-degrees Celsius before being written to the appropriate
register.
C
= (F - 32) x 5 / 9 x 2
half
Finally, note that as in the setup of the configuration register, a 10 millisecond
PAUSE is required after every EEPROM write. Once the thresholds are written to the
thermostat registers the THi and TLo outputs will operate independently and without
further program interface. The BASIC Stamp can read the configuration register to
get the status of the DS1620 THi and TLo outputs. See Experiment #30.