Rainbow-electronics DS1615 Manuel d'utilisateur

1 of 24 122800FEATURES Digital thermometer measures temperature -40°C to +85°C in 0.5°C increments (-40°Fto +183.2°F in 0.9°F increments) Digital

DS161510 of 24After a temperature conversion is completed, the number of the bin to be updated is determined bydropping the two least significant bits

DS161511 of 24starts a datalog mission or polls the device for information, one or both of these pins will be pulsed fourtimes. Depending on the stat

DS161512 of 24TIME OF DAY ALARM BITS Table 2ALARM REGISTER MASK BITS (BIT 7)SECONDS MINUTES HOURS DAYS1 1 1 1 Alarm once per second0 1 1 1 Alarm when

DS161513 of 24TLIE - Temperature Low Interrupt Enable - When set to a logic 1, this bit permits the Temperature LowFlag (TLF) in the Status register t

DS161514 of 24TLF - Temperature Low Flag - A logic 1 in the Temperature Low Flag bit indicates that the temperatureis/has been less than or equal to t

DS161515 of 24This register determines the low threshold for interrupt generation from the thermal sensor. If thetemperature is less than or equal to

DS161516 of 24A second security feature lies in the fact that once the sample rate has been selected by writing to theSample Rate register, it cannot

DS161517 of 24Synchronous CommunicationSynchronous communication is accomplished over the 3-wire bus which is composed of three signals.These are the

DS161518 of 24CRC HARDWARE DESCRIPTION AND POLYNOMIAL Figure 4Communication Reset (Asynchronous Mode)When transmitting the command, parameters, or da

DS161519 of 241. Write Byte (22h)Host Transmit:D7 D6 D5 D4 D3 D2 D1 D0001000100 a6a5a4a3a2a1a0d7 d6 d5 d4 d3 d2 d1 d0DS1615 Response: NoneNote that g

DS16152 of 24DESCRIPTIONThe DS1615 is an integrated temperature recorder that combines a real time clock with temperature datalogging and histogram ca

DS161520 of 24Note that the Specification test command is ignored if the ST button is pulled to ground when thecommand is issued.4. Read Temperature

DS161521 of 24ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -0.3V to +7.0VOperating Temperature -40°C to +85°CStorage Temperature

DS161522 of 24AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; VCC=5.0V ±10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESVcc rise/fall time tR/tF3 500 ms

DS161523 of 24POWER-UP/DOWN WAVEFORM TIMING Figure 5ASYNCHRONOUS SERIAL INTERFACE TIMING Figure 5SYNCHRONOUS (3-WIRE) SERIAL INTERFACE READ TIMING Fig

DS161524 of 24SPECIFICATION POLLING FROM ST INPUT Figure 8SPECIFICATION POLLING FROM COMMAND Figure 9STINSPECOUTSPECtSStSltShRXINSPECOUTSPECstart data

DS16153 of 24DS1615 BLOCK DIAGRAM Figure 1SIGNAL DESCRIPTIONSThe following paragraphs describe the function of each pin.VCC- VCC is a +5-volts input

DS16154 of 24I/O (3-wire Input/Output) - The I/O pin is the data Input/Output signal for the 3-wire synchronouscommunications channel.RST (3-wire R

DS16155 of 24DS1615 MEMORY MAP Figure 2aAddress Register Definition Page(s)0000H001FHRTC AND CONTROL REGISTERS 00020H003FH(RESERVED) 10040H005FHUSER N

DS16156 of 24DS1615 RTC AND CONTROL PAGE Figure 2bADDRESS BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 FUNCTION00 0 10 Seconds Single Seconds01 0

DS16157 of 24DS1615 ALARM TIME STAMPS AND DURATIONS Figure 2cSample Counter Address(Low, Medium, High Bytes)DurationAddressRegister220, 221, 222 223

DS16158 of 24THERMAL SENSORThe key to temperature monitoring in the DS1615 is an integrated thermal sensor. The thermal sensorcan measure temperature

DS16159 of 24Upon initiation of datalog mission by either method, the DS1615 will do two things:1. The INSPEC and OUTSPEC pins will generate four