参数资料
| 型号： | PI7C8154BNAIE |
| 厂商： | Pericom |
| 文件页数： | 5/114页 |
| 文件大小： | 0K |
| 描述： | IC PCI-PCI BRIDGE ASYNC 304-PBGA |
| 产品变化通告： | Product Discontinuation Notice 22/Jan/2010 |
| 标准包装： | 27 |
| 系列： | * |
| 应用： | * |
| 接口： | * |
| 电源电压： | * |
| 封装/外壳： | 304-BBGA |
| 供应商设备封装： | 304-PBGA（31x31） |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
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PI7C8154B
ASYNCHRONOUS 2-PORT
PCI-to-PCI BRIDGE
Advance Information
Page 102 of 114
JUNE 2008 REVISION 1.1
describe the boundary-scan test logic elements: TAP pins, instruction register, test data registers
and TAP controller. Figure 16-1 illustrates how these pieces fit together to form the JTAG unit.
Figure 16-1 TEST ACCESS PORT DIAGRAM
16.1.1
TAP PINS
The PI7C8154B’s TAP pins form a serial port composed of four input connections (TMS, TCK,
TRST# and TDI) and one output connection (TDO). These pins are described in Table 16-1. The
TAP pins provide access to the instruction register and the test data registers.
16.1.2
INSTRUCTION REGISTER
The Instruction Register (IR) holds instruction codes. These codes are shifted in through the Test
Data Input (TDI) pin. The instruction codes are used to select the specific test operation to be
performed and the test data register to be accessed.
The instruction register is a parallel-loadable, master/slave-configured 5-bit wide, serial-shift
register with latched outputs. Data is shifted into and out of the IR serially through the TDI pin
clocked by the rising edge of TCK. The shifted-in instruction becomes active upon latching from
the master stage to the slave stage. At that time the IR outputs along with the TAP finite state
machine outputs are decoded to select and control the test data register selected by that instruction.
Upon latching, all actions caused by any previous instructions terminate.
The instruction determines the test to be performed, the test data register to be accessed, or both.
The IR is two bits wide. When the IR is selected, the most significant bit is connected to TDI, and
the least significant bit is connected to TDO. The value presented on the TDI pin is shifted into the
IR on each rising edge of TCK. The TAP controller captures fixed parallel data (1101 binary).
When a new instruction is shifted in through TDI, the value 1101(binary) is always shifted out
through TDO, least significant bit first. This helps identify instructions in a long chain of serial data
from several devices.
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相关代理商/技术参数 |
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|---|---|
| PI7C8154EVB | 功能描述:界面开发工具 64B/66MHz 2 Port PCI Bridge Eval Brd RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| PI7C8154NA-33 | 制造商:PERICOM 功能描述: |
| PI7C81552 | 制造商:PERICOM 制造商全称:Pericom Semiconductor Corporation 功能描述:ENHANCED 2-PORT PCI TO PCI BRIDGE INTEL 21152 COMPARISON |
| PI7C81552A | 制造商:PERICOM 制造商全称:Pericom Semiconductor Corporation 功能描述:ENHANCED 2-PORT PCI TO PCI BRIDGE INTEL 21152 COMPARISON |
| PI7C9X110 | 制造商:PERICOM 制造商全称:Pericom Semiconductor Corporation 功能描述:PCI Express-to-PCI Reversible Bridge |
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