AS1860

Akros Silicon, Inc.

6399 San Ignacio Avenue, Suite 250, San Jose, CA 95119 USA

408.746.9000



http://www.AkrosSilicon.com

3

SW MODE POWER STATUS MONITORING (PGOOD) .......................................................................................................... 29

HISTORY REGISTER ................................................................................................................................................................30

PD VOLTAGE AND CURRENT MEASUREMENTS .........................................................................................................…..…30

PD OVER-CURRENT ALARM THRESHOLD ............................................................................................................................30

SW MODE POWER MARGINING..............................................................................................................................................30

SW MODE EMI PERFORMANCE CONTROL ...........................................................................................................................30

PWM CLOCKS - PRBS RANDOMIZATION ...............................................................................................................................30

PWM CLOCKS - FRACTIONAL-N .............................................................................................................................................30

SW MODE GENERAL-PURPOSE I/O & ADC............................................................................................................................30

GENERAL-PURPOSE I/O PINS.................................................................................................................................................31

GENERAL-PURPOSE ADC (ADCIN PIN)..................................................................................................................................31

SW MODE WATCHDOG TIMER OPERATION..........................................................................................................................31

WATCHDOG TIMER MODES ....................................................................................................................................................31

WATCHDOG TIMER OPERATION ............................................................................................................................................31

SW MODE INTERRUPT OPERATION ......................................................................................................................................32

INTERRUPT MASKING .............................................................................................................................................................32

INTERRUPT STATUS................................................................................................................................................................32

START/STOP TIMING ...............................................................................................................................................................32

DATA TIMING ............................................................................................................................................................................32

ACKNOWLEDGE (ACK) ............................................................................................................................................................32

DEVICE ADDRESS CONFIGURATION.....................................................................................................................................33

DEVICE ADDRESS/OPERATION WORD .................................................................................................................................34

REGISTER ADDRESS WORD...................................................................................................................................................34

DATA WORD..............................................................................................................................................................................34

WRITE CYCLE ...........................................................................................................................................................................34

READ CYCLE.............................................................................................................................................................................34

REGISTER DESCRIPTIONS .....................................................................................................................................................34

POWER OVER ETHERNET OVERVIEW ..................................................................................................................................42

POWER FEED ALTERNATIVES FOR 10/100/1000M ETHERNET SYSTEMS .........................................................................42

802.3AT SPECIFICATION .........................................................................................................................................................43

60W/90W APPLICATIONS.........................................................................................................................................................43

LLDP COMMUNICATION ..........................................................................................................................................................44

FOUR PAIR VOLTAGE SENSE ENABLED ...............................................................................................................................44

SWITCHING CONVERTER PRIMARY BIAS ENABLED ...........................................................................................................44

SECONDARY SIDE LOGIC ENABLE ........................................................................................................................................45

PACKAGE SPECIFICATIONS ...................................................................................................................................................48

CONTACT INFORMATION ........................................................................................................................................................50

IMPORTANT NOTICES .............................................................................................................................................................50

LEGAL NOTICE .........................................................................................................................................................................50

REFERENCE DESIGN POLICY.................................................................................................................................................50

LIFE SUPPORT POLICY ...........................................................................................................................................................50

SUBSTANCE COMPLIANCE .....................................................................................................................................................51