Rainbow-electronics AT73C246 Manual do Utilizador descarregar pdf (Página 157)

11050A–PMAAC–07-Apr-10

AT73C246

1 Description ............................................................................................... 2

2 Block Diagram .......................................................................................... 3

3 Package and Pinout ................................................................................. 4

4 Pin Description ......................................................................................... 5

5 Application Block Diagram ..................................................................... 8

6 Absolute Maximum Ratings .................................................................. 11

7 Recommended Operating Conditions .................................................. 11

8 Power Dissipation Ratings .................................................................... 11

9 PMU Electrical Characteristics ............................................................. 12

9.1Current Consumption Versus Modes ......................................................................12

9.2Supply Monitor Thresholds ......................................................................................12

9.3Digital I/Os DC Characteristics ................................................................................13

9.4DCDC0 and DCDC1 ................................................................................................14

9.5LDO2 .......................................................................................................................16

9.6LDO3 .......................................................................................................................17

9.7LDO4 .......................................................................................................................18

9.8LDO5 .......................................................................................................................19

9.9Measurement Bridge and 10-bit ADC .....................................................................20

9.10RTC Crystal Oscillator ...........................................................................................21

9.11Die Temperature Sensor .......................................................................................21

10 Audio Codec Electrical Characteristics ............................................... 22

11 PMU Functional Description ................................................................. 25

11.1Power Manager State Diagram .............................................................................25

11.2PMU Startup and Shutdown State Diagram ..........................................................26

11.3Power Manager Conditional Transitions ................................................................27

11.4Power Manager State Description .........................................................................29

11.5DCDC0 and DCDC1 Functional Description .........................................................36

11.6LDO2 Functional Description .................................................................................37

11.7LDO3 and LDO4 Functional Description ...............................................................37

11.8Power Fail Detectors .............................................................................................38

11.9Measurement Bridge and 10-bit ADC ....................................................................38

11.10Real Time Clock (RTC) User Interface ................................................................40

11.11Die Temperature Sensor .....................................................................................54

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Rainbow-electronics AT73C246 Manual do Utilizador Página 157