SFF-8449 - HD MANAGEMENT INTERFACE v1.1

Development *** THIS IS NOT A FINAL DRAFT *** SFF-8449 Rev 1.15.3.1.3 ModPrsLThe fixed-side shall de-assert the active-low ModPrsL signal. When mated with thefixed side, the free-side device shall assert ModPrsL low. See table TBD forelectrical characteristics of the signal, fixed-side and free-side terminationcharacteristics.5.3.1.4 IntLThe fixed-side shall de-assert the active-low ModPrsL signal. The free-side deviceshall assert IntL low to indicate that an event has occurred that requires interruptservice. The free-side device shall de-assert IntL after the fixed side has clearedthe appropriate interrupt flag bits within the free-side device memory map. Inaddition, the free-side device indicates completion of power up initialization byposting an IntL signal with the Data_Not_Ready (See SFF-8636) bit negated. See tableTBD for electrical characteristics of the signal, fixed-side and free-sidetermination characteristics.5.3.1.5 SCLTwo-wire interface clock.5.3.1.6 SDATwo-wire interface data.5.3.2 Free Side Device AddressingThe SFF-8449 management interface does not provide a mechanism to address individualfree-side devices. The fixed-side shall provide an independent physical layerinterface for each free-side device. Multiple free-side devices shall not share thesame clock and data signals.5.45.4.1 DC Electrical CharacteristicsSignal Symbol Min Max Unit ConditionVol 0 0.4 V Iol(max)=3.0mASCL, SDA Voh Vman-0.5 Vman+0.3 VVil -0.3 Vman*0.3 V(see note 1) Vih Vman*0.7 Vman+0.5 VVol 0 0.4 VModPrsL, IntL Voh Vman-0.5 Vman+0.3 V Iol=2.0mAVil -0.3 Vman*0.3 V(see note 1) Vih Vman*0.7 Vman+0.5 VManagement InterfacePower Supply Voltage Vman 1.7 3.6 VManagement InterfacePower Supply Current Iman - 8 mAActive Circuitry PowerSupply Voltage Vact - 3.6 VVin(nom) = 3.3V, 1Wfree side consumptionActive Circuitry PowerSupply Current Iact - 300mA mAMust add other casesfor reduced power andHD Management Interface Page 12