82802AC datasheet(16/53 Pages) INTEL

16 / 53 page

Intel

® 82802AB/AC Firmware Hub

Datasheet

Interface

Symbol

Type

Intel

FWH

A/A Mux

Name and Function

VPP

PWR

Block Erase/Program Power Supply. For erasing array blocks or

programming data. VPP

= 3.3 V or 12 V VPP. With VPP ≤ VPPLK,

memory contents cannot be altered. Attempting a block erase or

program with an invalid VPP (see DC Characteristics) will produce

spurious results and should not be attempted. VPP may only be held

at 12 V for 80 hours over the lifetime of the device.

VCC

PWR

Device Power Supply. Internal detection automatically configures

the device for optimized read performance. Do not float any power

pins. With VCC

≤ VLKO, all attempts to write to flash memory are

inhibited. Device operations at invalid VCC voltages (see DC

Characteristics) produce spurious results and should not be

attempted.

GND

PWR

Ground. Do not float any ground pins.

VCCa

PWR

Analog Power Supply. This supply should share the same system

supply as VCC.

GNDa

PWR

Analog Ground. Should be tied to same plane as GND.

RFU

Reserved For Future Use. These pins are reserved for future

generations of this product. They may be left disconnected or driven.

If they are driven, the voltage levels should satisfy VIH and VIL

requirements.

A/A Mux = DQ[7:4]

No Connect. Pin may be driven or floated. If it is driven, the voltage

levels should satisfy VIH and VIL. No connects appear only on the

40ld TSOP package.

Ry/By#

Ready/Busy. Valid only in A/A Mux Mode. This output pin is a

reflection of bit 7 in the Status Register. This pin is used to

determine block erase or program completion.

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