DLP-245SX DLP Design Inc, DLP-245SX Datasheet - Page 9

• Manufacturer Part Number: DLP-245SX
• Description: Interface Modules & Development Tools USB/Micro Dev Board
• Manufacturer: DLP Design Inc

Specifications of DLP-245SX

• Interface Type: USB
• Data Bus Width: 8 bit
• Operating Supply Voltage: 5.25 V
• Product: Interface Modules
• For Use With/related Products: SX28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

0xAC – DS18S20 Start Convert
Parameters:
Function:
Example:
0xAD – DS18S20 Read Data
Parameters:
Returns:
Function:
Example:
Returns:
Port Pin – Selects the microcontroller port pin on the SX28 to be used for
communication with the DS18S20 temperature sensor.
1 Byte: A single byte indicating the result of trying to reset the temperature
sensor.
Sensor status definitions:
This function will select a port pin for communicating with a DS18S20
temperature sensor and start a temperature conversion. In addition to power and
ground connections, a 1.5K to 4.7K pull-up resistor must be connected between
VCC and the data pin of the DS18S20 for proper communication. The
conversion time for the DS18S20 is specified for a maximum of 750 milliseconds.
0x2, 0xAC, 0xB0, 0x1E – Starts a temperature conversion on SX28 port pin B0.
Port Pin – Selects the microcontroller port pin on the SX28 to be used for
communication with the DS18S20 temperature sensor.
9 Bytes: The contents of the scratchpad memory in the DS18S20.
This function will select a port pin for communicating with a DS18S20
temperature sensor and request the current contents of the DS18S20’s
scratchpad memory. A conversion (command 0xAC) must have been previously
requested for the data to be current. Additionally, host software must wait at
least 750 milliseconds for the conversion to complete before reading the 9 bytes
of data. In addition to power and ground, a 1.5K to 4.7K pull-up resistor must be
connected between VCC and the data pin of the DS18S20 for proper
communications. (For an example of how to calculate .1°C resolution
temperature data from the 9 bytes of return data, refer to the example Windows
source code.)
0x2, 0xAD, 0xB0, 0x1F – Requests 9 byte temperature data from SX28 port pin
B0.
9
99: Sensor ready
8: Short circuit detected
2: No sensor detected