參數(shù)資料
型號(hào)： GS816272CGC-250IV
廠商： GSI TECHNOLOGY
元件分類： DRAM
英文描述： 256K x 72 18Mb S/DCD Sync Burst SRAMs
中文描述： 256K X 72 CACHE SRAM, 5.5 ns, PBGA209
封裝： 14 X 22 MM, 1 MM PITCH, ROHS COMPLIANT, BGA-209
文件頁(yè)數(shù)： 21/29頁(yè)
文件大?。?/td> 851K
代理商： GS816272CGC-250IV
GS816272CC-xxxV
Preliminary
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Rev: 1.02a 6/2006
21/29
2004, GSI Technology
Boundary Scan Register
The Boundary Scan Register is a collection of flip flops that can be preset by the logic level found on the RAM’s input or I/O pins.
The flip flops are then daisy chained together so the levels found can be shifted serially out of the JTAG Port’s TDO pin. The
Boundary Scan Register also includes a number of place holder flip flops (always set to a logic 1). The relationship between the
device pins and the bits in the Boundary Scan Register is described in the Scan Order Table following. The Boundary Scan
Register, under the control of the TAP Controller, is loaded with the contents of the RAMs I/O ring when the controller is in
Capture-DR state and then is placed between the TDI and TDO pins when the controller is moved to Shift-DR state. SAMPLE-Z,
SAMPLE/PRELOAD and EXTEST instructions can be used to activate the Boundary Scan Register.
Instruction Register
ID Code Register
·
31 30 29
Boundary Scan Register
0
1
2
0
· · ·
1
2
0
Bypass Register
TDI
TDO
TMS
TCK
Test Access Port (TAP) Controller
1
·
1
0
·
·
·
·
·
·
·
·
·
Control Signals
·
JTAG TAP Block Diagram
Identification (ID) Register
The ID Register is a 32-bit register that is loaded with a device and vendor specific 32-bit code when the controller is put in
Capture-DR state with the IDCODE command loaded in the Instruction Register. The code is loaded from a 32-bit on-chip ROM.
It describes various attributes of the RAM as indicated below. The register is then placed between the TDI and TDO pins when the
controller is moved into Shift-DR state. Bit 0 in the register is the LSB and the first to reach TDO when shifting begins.
相關(guān)PDF資料
PDF描述
GS816272CGC-250V 256K x 72 18Mb S/DCD Sync Burst SRAMs
GS816272CGC-150I 256K x 72 18Mb S/DCD Sync Burst SRAMs
GS816272CC 256K x 72 18Mb S/DCD Sync Burst SRAMs
GS816272CC-150 256K x 72 18Mb S/DCD Sync Burst SRAMs
GS816272CC-150I 256K x 72 18Mb S/DCD Sync Burst SRAMs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
GS816272CGC-300 制造商:GSI Technology 功能描述:SRAM SYNC OCTAL 2.5V/3.3V 18MBIT 256KX72 5NS/2.8NS 209FBGA - Trays
GS816273C-133 制造商:GSI Technology 功能描述:SRAM SYNC OCTAL 2.5V/3.3V 18MBIT 256KX72 3.5NS 209FBGA - Trays
GS816273C-133I 制造商:GSI Technology 功能描述:SRAM SYNC OCTAL 2.5V/3.3V 18MBIT 256KX72 3.5NS 209FBGA - Trays
GS816273C-150 制造商:GSI Technology 功能描述:SRAM SYNC OCTAL 2.5V/3.3V 18MBIT 256KX72 3.3NS 209FBGA - Trays
GS816273C-150I 制造商:GSI Technology 功能描述:SRAM SYNC OCTAL 2.5V/3.3V 18MBIT 256KX72 3.3NS 209FBGA - Trays
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