Rainbow-electronics DS1302 Manual do Utilizador

Copyright 1995 by Dallas Semiconductor Corporation.All Rights Reserved. For important information regardingpatents and other intellectual property r

DS1302041697 10/12AC ELECTRICAL CHARACTERISTICS (cont’d) (0°C to 70°C; VCC = +5V ± 10%*)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESCLK to RST HoldtCCHVCC

DIM MIN MAX8–PINPKGA IN.MMB IN.MMC IN.MMD IN.MME IN.MMF IN.MMG IN.MMH IN.MMJ IN.MMK IN.MM0.3609.140.40010.160.2406.100.2606.600.1203.050.1403.560.3007

DS1302041697 12/12DS1302S SERIAL TIMEKEEPER 8–PIN SOIC (150 MIL AND 200 MIL)DIM MIN MAX8–PIN(150 MIL)PKGA IN.MMB IN.MMC IN.MME IN.MMF IN.MMG IN.MMH IN

176A45A34A23A12A01RD0WRAMCKDS1302041697 2/12The DS1302 is the successor to the DS1202. In addi-tion to the basic timekeeping functions of the DS1202,

DS1302041697 3/12RESET AND CLOCK CONTROLAll data transfers are initiated by driving the RST inputhigh. The RST input serves two functions. First, RSTt

DS1302041697 4/12TCS. The RS bits (bits 0 – 1) select the resistor that isconnected between VCC2 and VCC1. The resistorselected by the resistor sele

DS1302041697 5/12DATA TRANSFER SUMMARY Figure 3SCLKI/ORST01 23456 701 23456 7R/WA0 A1 A2 A3 A4 1ADDRESS COMMAND DATA INPUT/OUTPUTSINGLE BYTE TRANSFERS

DS1302041697 6/12REGISTER ADDRESS/DEFINITION Figure 41760504030201RD0WREGISTER ADDRESS REGISTER DEFINITION01 0 0 0 0 1RD0W1 0 0 0 1 0RD01 0 0 0 1 1RD0

DS1302041697 7/12DS1302 PROGRAMMABLE TRICKLE CHARGER Figure 51 OF 3SELECT1 OF 2SELECT1 OF 16 SELECT(NOTE: ONLY 1010 CODE ENABLES CHARGERVCC2PIN #1VCC1

DS1302041697 8/12ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground –0.5V to +7.0VOperating Temperature 0°C to 70°CStorage Temperature –55

DS1302041697 9/12DC ELECTRICAL CHARACTERISTICS (cont’d) (0°C to 70°C; VCC = 2.5 to 5.5V*)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESTimekeeping CurrentIC