參數(shù)資料
型號(hào)： CY7C1381D-133BZXC
廠商： CYPRESS SEMICONDUCTOR CORP
元件分類(lèi)： DRAM
英文描述： 18-Mbit (512K x 36/1M x 18) Flow-Through SRAM
中文描述： 512K X 36 CACHE SRAM, 6.5 ns, PBGA165
封裝： 13 X 15 MM, 1.40 MM HEIGHT, LEAD FREE, MO-216, FBGA-165
文件頁(yè)數(shù)： 12/29頁(yè)
文件大?。?/td> 477K
代理商： CY7C1381D-133BZXC
PRELIMINARY
CY7C1381D
CY7C1383D
Document #: 38-05544 Rev. *A
Page 12 of 29
The IDCODE instruction is loaded into the instruction register
upon power-up or whenever the TAP controller is given a test
logic reset state.
SAMPLE Z
The SAMPLE Z instruction causes the boundary scan register
to be connected between the TDI and TDO balls when the TAP
controller is in a Shift-DR state. It also places all SRAM outputs
into a High-Z state.
SAMPLE/PRELOAD
SAMPLE/PRELOAD is a 1149.1 mandatory instruction. When
the SAMPLE/PRELOAD instructions are loaded into the
instruction register and the TAP controller is in the Capture-DR
state, a snapshot of data on the inputs and output pins is
captured in the boundary scan register.
The user must be aware that the TAP controller clock can only
operate at a frequency up to 20 MHz, while the SRAM clock
operates more than an order of magnitude faster. Because
there is a large difference in the clock frequencies, it is
possible that during the Capture-DR state, an input or output
will undergo a transition. The TAP may then try to capture a
signal while in transition (metastable state). This will not harm
the device, but there is no guarantee as to the value that will
be captured. Repeatable results may not be possible.
To guarantee that the boundary scan register will capture the
correct value of a signal, the SRAM signal must be stabilized
long enough to meet the TAP controller's capture set-up plus
hold times (t
CS
and t
CH
). The SRAM clock input might not be
captured correctly if there is no way in a design to stop (or
slow) the clock during a SAMPLE/PRELOAD instruction. If this
is an issue, it is still possible to capture all other signals and
simply ignore the value of the CK and CK# captured in the
boundary scan register.
Once the data is captured, it is possible to shift out the data by
putting the TAP into the Shift-DR state. This places the
boundary scan register between the TDI and TDO pins.
PRELOAD allows an initial data pattern to be placed at the
latched parallel outputs of the boundary scan register cells
prior to the selection of another boundary scan test operation.
The shifting of data for the SAMPLE and PRELOAD phases
can occur concurrently when required - that is, while data
captured is shifted out, the preloaded data can be shifted in.
BYPASS
When the BYPASS instruction is loaded in the instruction
register and the TAP is placed in a Shift-DR state, the bypass
register is placed between the TDI and TDO balls. The
advantage of the BYPASS instruction is that it shortens the
boundary scan path when multiple devices are connected
together on a board.
Reserved
These instructions are not implemented but are reserved for
future use. Do not use these instructions.
TAP Timing
tTL
Test Clock
(TCK)
1
2
3
4
5
6
Test Mode Select
(TMS)
tTH
Test Data-Out
(TDO)
tCYC
Test Data-In
(TDI)
tTMSH
tTMSS
tTDIH
tTDIS
tTDOX
tTDOV
DON’T CARE
UNDEFINED
相關(guān)PDF資料
PDF描述
CY7C1383D 18-Mbit (512K x 36/1M x 18) Flow-Through SRAM
CY7C1383D-100AXC 18-Mbit (512K x 36/1M x 18) Flow-Through SRAM
CY7C1383D-100AXI 18-Mbit (512K x 36/1M x 18) Flow-Through SRAM
CY7C1383D-100BGC 18-Mbit (512K x 36/1M x 18) Flow-Through SRAM
CY7C1383D-100BGI 18-Mbit (512K x 36/1M x 18) Flow-Through SRAM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CY7C1381DV25-133AXC 制造商:Cypress Semiconductor 功能描述:
CY7C1381F-133BGC 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 512Kx36 3.3V Sync FT 靜態(tài)隨機(jī)存取存儲(chǔ)器 RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪(fǎng)問(wèn)時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray
CY7C1381F-133BGCT 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 512Kx36 3.3V Sync FT 靜態(tài)隨機(jī)存取存儲(chǔ)器 RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪(fǎng)問(wèn)時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray
CY7C1381S-133AXC 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 CY7C1381S-133AXC RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪(fǎng)問(wèn)時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray
CY7C1381XC 制造商:Cypress Semiconductor 功能描述:
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