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ISL12020MIRZ Datasheet(PDF) 3 Page - Intersil Corporation |
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ISL12020MIRZ Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 32 page 3 FN6667.4 February 11, 2010 Table of Contents Block Diagram .................................................. 2 Pin Descriptions ............................................... 4 Absolute Maximum Ratings .............................. 5 Electrical Specifications.....................................6 SDA vs SCL Timing............................................ 8 Symbol Table.................................................... 8 Typical Performance Curves ............................. 8 General Description ........................................ 10 Functional Description.................................... 10 Power Control Operation ................................. 10 Normal Mode (VDD) to Battery-Backup Mode (VBAT) ................................................ 10 Battery-Backup Mode (VBAT) to Normal Mode (VDD)................................................. 10 Power Failure Detection .................................. 11 Brownout Detection ........................................ 11 Battery Level Monitor...................................... 11 Real Time Clock Operation.............................. 11 Single Event and Interrupt .............................. 11 Frequency Output Mode .................................. 12 General Purpose User SRAM ............................ 12 I2C Serial Interface ........................................ 12 Oscillator Compensation.................................. 12 Register Descriptions ..................................... 12 Real Time Clock Registers .............................. 14 Addresses [00h to 06h]................................... 14 Control and Status Registers (CSR) ................ 14 Addresses [07h to 0Fh]................................... 14 Status Register (SR)....................................... 14 Interrupt Control Register (INT) ...................... 16 Initial AT and DT setting Register (ITRO) .......... 17 ALPHA Register (ALPHA)................................. 19 BETA Register (BETA) .................................... 19 Final Analog Trimming Register (FATR)............. 20 Final Digital Trimming Register (FDTR) ............. 21 ALARM Registers (10h to 15h)......................... 21 Time Stamp VDD to Battery Registers (TSV2B) ..................................................... 22 Time Stamp Battery to VDD Registers (TSB2V) ..................................................... 22 DST Control Registers (DSTCR) ....................... 22 TEMP Registers (TEMP)................................... 24 NPPM Registers (NPPM) .................................. 24 XT0 Registers (XT0)....................................... 24 ALPHA Hot Register (ALPHAH) ......................... 25 User Registers (Accessed by Using Slave Address 1010111x) .................................. 25 Addresses [00h to 7Fh] ................................. 25 I2C Serial Interface ........................................ 25 Protocol Conventions ..................................... 25 Device Addressing.......................................... 26 Write Operation ............................................. 27 Read Operation .............................................. 27 Application Section ........................................ 27 Battery-Backup Details................................... 27 Layout Considerations .................................... 28 Measuring Oscillator Accuracy ......................... 28 Temperature Compensation Operation.............. 29 Daylight Savings Time (DST) Example.............. 29 Revision History ............................................. 30 Products......................................................... 31 ISL12020M |
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