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PM7348 参数 Datasheet PDF下载

PM7348图片预览
型号: PM7348
PDF下载: 下载PDF文件 查看货源
内容描述: [ATM/SONET/SDH IC, CMOS, PBGA324,]
分类和应用: ATM异步传输模式
文件页数/大小: 318 页 / 1736 K
品牌: PMC [ PMC-SIERRA, INC ]
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S/UNI-IMA-4 Telecom Standard Product Data Sheet  
Released  
10.6 JTAG Test Access Port  
The JTAG Test Access Port block provides JTAG support for boundary scan. The standard  
JTAG EXTEST, SAMPLE, BYPASS, IDCODE and STCTEST instructions are supported. The  
S/UNI-IMA-4 identification code is 173400CD hexadecimal.  
10.6.1 JTAG Support  
The S/UNI-IMA-4 supports the IEEE Boundary Scan Specification as described in the IEEE  
1149.1 standards. The Test Access Port (TAP) consists of the five standard pins; TRSTB, TCK,  
TMS, TDI and TDO used to control the TAP controller and the boundary scan registers. The  
TRSTB input is the active-low reset signal used to reset the TAP controller. TCK is the test  
clock used to sample data on input, TDI and to output data on output, TDO. The TMS input is  
used to direct the TAP controller through its states. The basic boundary scan architecture is  
shown below.  
Figure 27 Boundary Scan Architecture  
Boundary Scan  
TDI  
Register  
Device Identification  
Register  
Bypass  
Register  
Instruction  
Register  
and  
Mux  
DFF  
TDO  
Decode  
Control  
TMS  
Test  
Access  
Port  
Select  
Controller  
Tri-state Enable  
TRSTB  
TCK  
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.  
Document No.: PMC-2020889, Issue 2  
86