AUSTIN SEMICONDUCTOR, INC.
ADVANCE INFORMATION
nvSRAM
AS8nvLC512K32
Austin Semiconductor, Inc.
PIN ASSIGNMENT
MILITARY PINOUT/BLOCK DIAGRAM
(Top View)
VCAP1
68 Lead CQFP (Q)
CS
M4
HSB2
CS
M3
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 1
2 2
2 3
2 4
2 5
2 6
6 0
I/O 16
I/O 17
I/O 18
I/O 19
I/O 20
I/O 21
I/O 22
I/O 23
GND
I/O 24
I/O 25
I/O 26
I/O 27
I/O 28
I/O 29
I/O 30
I/O 31
I/O 0
I/O 1
5 9
5 8
5 7
5 6
5 5
5 4
5 3
5 2
5 1
5 0
4 9
4 8
4 7
4 6
4 5
4 4
I/O 2
I/O 3
CS
M2
I/O 4
I/O 5
I/O 6
I/O 7
GND
I/O 8
CS
M1
I/O 9
I/O 10
I/O 11
I/O 12
I/O 13
I/O 14
I/O 15
Notes:
1. This pin left open if ordered with capacitors already mounted in
package.
2. HSB\ signal is wired to all 4 die in module. This can be left open if
not used.
PinꢀName
ꢀI/OꢀTypeꢀ
Description
A0ꢀ–ꢀA18
A0ꢀ–ꢀA17
AddressꢀInputsꢀUsedꢀtoꢀSelectꢀoneꢀofꢀtheꢀ524,288ꢀbytesꢀofꢀtheꢀnvSRAMꢀforꢀx8ꢀConfiguration.
AddressꢀInputsꢀUsedꢀtoꢀSelectꢀoneꢀofꢀtheꢀ262,144ꢀwordsꢀofꢀtheꢀnvSRAMꢀforꢀx16ꢀConfiguration.
Input
DQ0ꢀ–ꢀDQ7
DQ0ꢀ–ꢀDQ15
DQ16ꢀͲDQ23
DQ24ꢀͲꢀDQ31
Input/Output BidirectionalꢀDataꢀI/OꢀLinesꢀforꢀdieꢀM1ꢀ(DQ0Ͳ7),ꢀM2ꢀ(DQ8Ͳ15),ꢀꢀM3ꢀ(DQ16Ͳ23),ꢀM4ꢀ(DQꢀ24Ͳ31)
WriteꢀEnableꢀInput,ꢀActiveꢀLOW.ꢀWhenꢀselectedꢀLOW,ꢀdataꢀonꢀtheꢀI/Oꢀpinsꢀisꢀwrittenꢀtoꢀtheꢀspecificꢀ
addressꢀlocation.
WE\1Ͳ4
CE\1Ͳ4
OE\
Input
Input
Input
ChipꢀEnableꢀInput,ꢀActiveꢀLOW.ꢀWhenꢀLOW,ꢀselectsꢀtheꢀchip.ꢀWhenꢀHIGH,ꢀdeselectsꢀtheꢀchip.
OutputꢀEnable,ꢀActiveꢀLOW.ꢀTheꢀactiveꢀLOWꢀOEꢀinputꢀenablesꢀtheꢀdataꢀoutputꢀbuffersꢀduringꢀreadꢀcycles.ꢀ
I/OꢀpinsꢀareꢀtriͲstatedꢀonꢀdeassertingꢀOEꢀHIGH.
VSS
VCC
Ground
GroundꢀforꢀtheꢀDevice.ꢀMustꢀbeꢀconnectedꢀtoꢀtheꢀgroundꢀofꢀtheꢀsystem.
PowerꢀSupply PowerꢀSupplyꢀInputsꢀtoꢀtheꢀDevice.
HardwareꢀStoreꢀBusyꢀ(HSB\).ꢀWhenꢀLOWꢀthisꢀoutputꢀindicatesꢀthatꢀaꢀhardwareꢀstoreꢀisꢀinꢀprogress.ꢀWhenꢀ
pulledꢀLOWꢀexternalꢀtoꢀtheꢀchipꢀitꢀinitiatesꢀaꢀnonvolatileꢀSTOREꢀoperation.ꢀAꢀweakꢀinternalꢀpullꢀupꢀresistorꢀ
keepsꢀthisꢀpinꢀHIGHꢀifꢀnotꢀconnectedꢀ(connectionꢀoptional).ꢀAfterꢀeachꢀstoreꢀoperationꢀHSB\ꢀisꢀdrivenꢀ
HIGHꢀforꢀshortꢀtimeꢀwithꢀstandardꢀoutputꢀhighꢀcurrent.
HSB\ꢀ
Input/Output
AutoStoreꢀCapacitor.ꢀSuppliesꢀpowerꢀtoꢀtheꢀnvSRAMꢀduringꢀpowerꢀlossꢀtoꢀstoreꢀdataꢀfromꢀSRAMꢀtoꢀ
nonvolatileꢀelements.ꢀ(leaveꢀpinꢀopenꢀifꢀcapsꢀmountedꢀonꢀpackage)
NoꢀConnect NoꢀConnect.ꢀThisꢀpinꢀisꢀnotꢀconnectedꢀtoꢀtheꢀdie.
VCAP
NC
PowerꢀSupply
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
AS8nvLC512K32
Rev. 0.0 08/09
2
AUSTIN [ AUSTIN SEMICONDUCTOR ]
