参数资料
型号: IDT72V73273BBG
厂商: IDT, Integrated Device Technology Inc
文件页数: 17/36页
文件大小: 0K
描述: IC DGTL SW 32768X32768 208-BGA
标准包装: 12
系列: 72V
类型: 多路复用器
电路: 8 x 1:1
电压电源: 单电源
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 208-BGA
供应商设备封装: 208-PBGA(17x17)
包装: 托盘
其它名称: 72V73273BBG
24
INDUSTRIAL TEMPERATURERANGE
IDT72V73273 3.3V TIME SLOT INTERCHANGE
DIGITAL SWITCH WITH RATE MATCHING 32,768 x 32,768 CHANNELS
JTAG SUPPORT
TheIDT72V73273JTAGinterfaceconformstotheBoundary-Scanstandard
IEEE-1149.1.Thisstandardspecifiesadesign-for-testabilitytechniquecalled
Boundary-Scan test (BST). The operation of the boundary-scan circuitry is
controlled by an external test access port (TAP) Controller.
TEST ACCESS PORT (TAP)
The Test Access Port (TAP) provides access to the test functions of the
IDT72V73273. It consists of three input pins and one output pin.
Test Clock Input (TCK)
TCKprovidestheclockforthetestlogic.TheTCKdoesnotinterferewithany
on-chipclockandthusremainsindependent.TheTCKpermitsshiftingoftest
data into or out of the Boundary-Scan register cells concurrently with the
operationofthedeviceandwithoutinterferingwiththeon-chiplogic.
Test Mode Select Input (TMS)
The logic signals received at the TMS input are interpreted by the TAP
Controllertocontrolthetestoperations.TheTMSsignalsaresampledatthe
risingedgeoftheTCKpulse. ThispinisinternallypulledtoVCCwhenitisnot
driven from an external source.
Test Data Input (TDI)
Serialinputdataappliedtothisportisfedeitherintotheinstructionregisteror
intoatestdataregister,dependingonthesequencepreviouslyappliedtothe
TMSinput.Bothregistersaredescribedinasubsequentsection.Thereceived
inputdataissampledattherisingedgeofTCKpulses.Thispinisinternallypulled
to VCC when it is not driven from an external source.
TestDataOutput(TDO)
DependingonthesequencepreviouslyappliedtotheTMSinput,thecontents
ofeithertheinstructionregisterordataregisterareseriallyshiftedoutthrough
the TDO pin on the falling edge of each TCK pulse. When no data is shifted
through the boundary scan cells, the TDO driver is set to a High-Impedance
state.
TABLE 17—IDENTIFICATION REGISTER DEFINITIONS
INSTRUCTION FIELD
VALUE
DESCRIPTION
RevisionNumber(31:28)
0x0
Reservedforversionnumber
IDT Device ID (27:12)
0x0430
DefinesIDTpartnumber
IDT JEDEC ID (11:1)
0x33
AllowsuniqueidentificationofdevicevendorasIDT
ID Register Indicator Bit (Bit 0)
1
IndicatesthepresenceofanIDregister
REGISTER NAME
BIT SIZE
Instruction(IR)
4
Bypass (BYR)
1
Identification(IDR)
32
Boundary Scan (BSR)
Note(1)
TABLE 18 — SCAN REGISTER SIZES
NOTES:
1. The Boundary Scan Descriptive Language (BSDL) file for this device is available on
the IDT website (www.idt.com), or by contacting your local IDT sales representative.
Test Reset (TRST)
ResettheJTAGscanstructure.ThispinisinternallypulledtoVCCwhenit
is not driven from an external source.
INSTRUCTION REGISTER
InaccordancewiththeIEEE-1149.1standard,theIDT72V73273usespublic
instructions.TheIDT72V73273JTAGinterfacecontainsafour-bitinstruction
register.InstructionsareseriallyloadedintotheinstructionregisterfromtheTDI
whentheTAPControllerisinitsshift-IRstate.Subsequently,theinstructionsare
decodedtoachievetwobasicfunctions:toselectthetestdataregisterthatmay
operatewhiletheinstructioniscurrent,andtodefinetheserialtestdataregister
path, which is used to shift data between TDI and TDO during data register
scanning. See Table 12 for Instruction decoding.
TESTDATAREGISTER
AsspecifiedinIEEE-1149.1,theIDT72V73273JTAGInterfacecontainstwo
testdataregisters:
The Boundary-Scan register
The Boundary-Scan register consists of a series of Boundary-Scan cells
arranged to form a scan path around the boundary of the IDT72V73273 core
logic.
The Bypass Register
TheBypassregisterisasinglestageshiftregisterthatprovidesaone-bitpath
from TDI to TDO. The IDT72V73273 boundary scan register bits are shown
inTable14.Bit0isthefirstbitclockedout.Allthree-stateenablebitsareactive
HIGH.
ID CODE REGISTER
AsspecifiedinIEEE-1149.1,thisinstructionloadstheIDRwiththeRevision
Number, Device ID, JEDEC ID, and ID Register Indicator Bit. See Table 10.
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