Rainbow-electronics DS2411 Manual de usuario

1-Wire is a registered trademark of Dallas Semiconductor. 1 of 11 052003FEATURES§ Unique, Factory-Lasered and Tested 64-BitRegistration Number (8-Bit

DS241110 of 11Slave to MasterA read-data time slot begins like a write-one time slot. The voltage on the data line must remain belowVTLMIN until the r

DS241111 of 11NOISE SUPPRESSION SCHEME Figure 8VPUPVTHVHY0VtREHtGLtREHtGLCase A Case CCase BCRC GENERATIONTo validate the registration number transmit

DS24112 of 11ABSOLUTE MAXIMUM RATINGS*I/O Voltage to GND -0.5V to +6VVCC Voltage to GND -0.5V to +6VI/O, VCC Current ±20mAOperating Temperature Range

DS24113 of 11PARAMETER SYMBOL CONDITIONS MIN MAX UNITSI/O PIN, 1-Wire RESET, PRESENCE DETECT CYCLEStandard speed 480 640Reset Low Time tRSTLOverdrive

DS24114 of 11Note 11: e represents the time required for the pullup circuitry to pull the voltage on I/O up VIL toVTH.Note 12: d represents the time r

DS24115 of 11Figure 2. 1-WIRE CRC GENERATORX0X1X2X3X4X5X6X7X8POLYNOMIAL = X8 + X5 + X4 + 11stSTAGE2ndSTAGE3rdSTAGE4thSTAGE6thSTAGE5thSTAGE7thSTAGE8thS

DS24116 of 11TRANSACTION SEQUENCEThe communication sequence for accessing the DS2411 through the 1-Wire bus is as follows:§ Initialization§ ROM Func

DS24117 of 11Figure 5. ROM FUNCTIONS FLOW CHARTYNNDS2411 TxCRC ByteDS2411 TxSerial Number(6 Bytes)DS2411 TxFamily Code(1 Byte)YN33hRead ROMCommand?Bit

DS24118 of 111-WIRE SIGNALINGThe DS2411 requires strict protocols to ensure data integrity. The protocol consists of four types ofsignaling on one lin

DS24119 of 11INITIALIZATION PROCEDUREFigure 6. Reset and Presence PulseRESISTOR MASTER DS2411tRSTLtPDLtPDHMASTER Tx RESET PULSE MASTER Rx PRESENCE PUL