AT73C224-G_14 Datasheet, PDF (73/75 Pages) ATMEL Corporation – Ultra-low Power Real-time Clock (RTC) and Backup Battery Management

AT73C224
Table of Contents
Features ..................................................................................................... 1
1 Description ............................................................................................... 1
2 Block Diagram .......................................................................................... 3
3 Pinout ........................................................................................................ 4
4 Application examples .............................................................................. 5
5 Detailed Description ................................................................................ 9
5.1 Core ...................................................................................................................9
5.2 Automatic Start-up Sequences and Shut-down ...............................................10
5.3 Digital Control and Protocol .............................................................................13
6 Register Tables ...................................................................................... 20
6.1 System Registers ............................................................................................20
6.2 PMU Registers ................................................................................................23
6.3 Interrupt Registers ...........................................................................................39
6.4 RTC Registers .................................................................................................43
7 Electrical Characteristics ...................................................................... 57
7.1 Absolute Maximum Ratings .............................................................................57
7.2 Recommended Operating Conditions .............................................................57
7.3 Digital I/Os .......................................................................................................58
7.4 Current Consumption Versus Modes ..............................................................58
7.5 BOOST1: Step-up Converter ...........................................................................59
7.6 BUCK2: Step-down Converter .........................................................................62
7.7 LDO3 & LDO4 .................................................................................................65
7.8 Real-time Clock (RTC) ....................................................................................67
7.9 VINT ................................................................................................................69
8 Package Drawing ................................................................................... 70
9 Revision History ..................................................................................... 71
Table of Contents....................................................................................... i
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6266A–PMAAC–08-Sep-08