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參數資料
型號: GS8662R18GE-300
廠商: GSI TECHNOLOGY
元件分類: DRAM
英文描述: 72Mb SigmaCIO DDR-II Burst of 4 SRAM
中文描述: 4M X 18 DDR SRAM, 0.45 ns, PBGA165
封裝: 15 MM X 17 MM, 1 MM PITCH, ROHS COMPLIANT, FPBGA-165
文件頁數: 30/37頁
文件大小: 942K
代理商: GS8662R18GE-300
Preliminary
GS8662R08/09/18/36E-333/300/250/200/167
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Rev: 1.01 9/2005
30/37
2005, GSI Technology
EXTEST
EXTEST is an IEEE 1149.1 mandatory public instruction. It is to be executed whenever the instruction register is loaded with
all logic 0s. The EXTEST command does not block or override the RAM’s input pins; therefore, the RAM’s internal state is
still determined by its input pins.
Typically, the Boundary Scan Register is loaded with the desired pattern of data with the SAMPLE/PRELOAD command.
Then the EXTEST command is used to output the Boundary Scan Register’s contents, in parallel, on the RAM’s data output
drivers on the falling edge of TCK when the controller is in the Update-IR state.
Alternately, the Boundary Scan Register may be loaded in parallel using the EXTEST command. When the EXTEST instruc-
tion is selected, the sate of all the RAM’s input and I/O pins, as well as the default values at Scan Register locations not asso-
ciated with a pin, are transferred in parallel into the Boundary Scan Register on the rising edge of TCK in the Capture-DR
state, the RAM’s output pins drive out the value of the Boundary Scan Register location with which each output pin is associ-
ated.
IDCODE
The IDCODE instruction causes the ID ROM to be loaded into the ID register when the controller is in Capture-DR mode and
places the ID register between the TDI and TDO pins in Shift-DR mode. The IDCODE instruction is the default instruction
loaded in at power up and any time the controller is placed in the Test-Logic-Reset state.
SAMPLE-Z
If the SAMPLE-Z instruction is loaded in the instruction register, all RAM outputs are forced to an inactive drive state (high-
Z) and the Boundary Scan Register is connected between TDI and TDO when the TAP controller is moved to the Shift-DR
state.
RFU
These instructions are Reserved for Future Use. In this device they replicate the BYPASS instruction.
JTAG TAP Instruction Set Summary
Instruction
Code
Description
Notes
EXTEST
000
Places the Boundary Scan Register between TDI and TDO.
1
IDCODE
001
Preloads ID Register and places it between TDI and TDO.
1, 2
SAMPLE-Z
010
Captures I/O ring contents. Places the Boundary Scan Register between TDI and
TDO.
Forces all RAM output drivers to High-Z.
1
RFU
011
Do not use this instruction; Reserved for Future Use.
1
SAMPLE/
PRELOAD
100
Captures I/O ring contents. Places the Boundary Scan Register between TDI and
TDO.
1
RFU
101
Do not use this instruction; Reserved for Future Use.
1
RFU
110
Do not use this instruction; Reserved for Future Use.
1
BYPASS
111
Places Bypass Register between TDI and TDO.
1
Notes:
1.
2.
Instruction codes expressed in binary, MSB on left, LSB on right.
Default instruction automatically loaded at power-up and in test-logic-reset state.
相關PDF資料
PDF描述
GS8662R18GE-300I 72Mb SigmaCIO DDR-II Burst of 4 SRAM
GS8662R18GE-333 72Mb SigmaCIO DDR-II Burst of 4 SRAM
GS8662R18GE-333I 72Mb SigmaCIO DDR-II Burst of 4 SRAM
GS8662R36E-167 72Mb SigmaCIO DDR-II Burst of 4 SRAM
GS8662R36E-167I 72Mb SigmaCIO DDR-II Burst of 4 SRAM
相關代理商/技術參數
參數描述
GS8662R18GE-300I 制造商:GSI 制造商全稱:GSI Technology 功能描述:72Mb SigmaCIO DDR-II Burst of 4 SRAM
GS8662R18GE-333 制造商:GSI 制造商全稱:GSI Technology 功能描述:72Mb SigmaCIO DDR-II Burst of 4 SRAM
GS8662R18GE-333I 制造商:GSI 制造商全稱:GSI Technology 功能描述:72Mb SigmaCIO DDR-II Burst of 4 SRAM
GS8662R36BGD-250I 制造商:GSI Technology 功能描述:GS8662R36BGD-250I - Trays
GS8662R36E-167 制造商:GSI 制造商全稱:GSI Technology 功能描述:72Mb SigmaCIO DDR-II Burst of 4 SRAM
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