Rainbow-electronics DS1339 Uživatelský manuál Strana 1

1 of 18 072302Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any

DS133910 of 18Figure 6. PROGRAMMABLE TRICKLE CHARGE 1 OF 16 SELECT NOTE: ONLY 1010 ENABLES CHARGER 1 OF 2 SELECT 1 OF 3 SELECT TCS3 TC

DS133911 of 182-WIRE SERIAL DATA BUSThe DS1339 supports a bidirectional 2-wire bus and data transmission protocol. A device that sends dataonto the bu

DS133912 of 18Figure 7. DATA TRANSFER ON 2-WIRE SERIAL BUSDepending upon the state of the R/ W bit, two types of data transfer are possible:1) Data

DS133913 of 18The DS1339 can operate in the following two modes:1) Slave Receiver Mode (Write Mode): Serial data and clock are received through SDA a

DS133914 of 18ABSOLUTE MAXIMUM RATINGS*Voltage Range on Any Pin Relative to Ground -0.3V to +6.0VOperating Temperature Range -40°C to +85°CStorage Te

DS133915 of 18CRYSTAL SPECIFICATIONS*PARAMETER SYMBOL MIN TYP MAX UNITS NOTESNominal Frequency FO32.768 kHzSeries Resistance ESR 45 kLoad Capacitance

DS133916 of 18AC ELECTRICAL CHARACTERISTICS (VCC = MIN to MAX, TA = -40°C t

DS133917 of 18Figure 10. TIMING DIAGRAMFigure 11. POWER-UP/DOWN TIMINGOUTPUTSVCCVPF(max)VPF(min)INPUTSHIGH-ZDON'T CAREVALIDRECOGNIZED RECOGNIZEDV

DS133918 of 18POWER-UP DOWN CHARACTERISTICS (TA = -40°C to +85°C) (Note 12)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESRecovery at Power-up

DS13392 of 18DESCRIPTIONThe DS1339 serial real-time clock is a low-power clock/date device with two programmable time-of-dayalarms and a programmable

DS13393 of 18SIGNAL DESCRIPTIONSVCC, GND – DC power is provided to the device on these pins.SCL (Serial Clock Input) – SCL is used to synchronize data

DS13394 of 18CLOCK ACCURACYThe accuracy of the clock is dependent upon the accuracy of the crystal and the accuracy of the matchbetween the capacitive

DS1339 5 of 18 Figure 2. DS1339 TIMEKEEPER REGISTERS ADDRESS BIT7 BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 BIT0 FUNCTION RANGE 00H 0 10 SEC

DS13396 of 18TIME AND DATE OPERATIONThe time and date information is obtained by reading the appropriate register bytes. The real-time clockregisters

DS13397 of 18Figure 3. ALARM MASK BITSALARM 1 REGISTER MASK BITS(BIT 7)DY/DTA1M4 A1M3 A1M2 A1M1ALARM RATEX 1 1 1 1 Alarm once per secondX 1 1 1 0 Alar

DS1339 8 of 18 Figure 4. SQUARE-WAVE OUTPUT FREQUENCY RS2 RS1 SQUARE-WAVE OUTPUT FREQUENCY 0 0 1Hz 0 1 4.096kHz 1 0 8.192kHz 1 1 32.768kHz

DS13399 of 18is cleared when written to logic 0. This bit can only be written to logic 0. Attempting to write to logic 1leaves the value unchanged.A2F