參數(shù)資料
型號: FW82815
英文描述: Controller Miscellaneous - Datasheet Reference
中文描述: 控制器雜項-數(shù)據(jù)表參考
文件頁數(shù): 165/172頁
文件大小: 795K
代理商: FW82815
82815 GMCH
R
Datasheet
165
6.
Testability
In the GMCH, the testability for Automated Test Equipment (ATE) board level testing has been changed
from the traditional NAND chain mode to a XOR chain. The GMCH pins are grouped in eight XOR
chains.
An XOR-Tree is a chain of XOR gates each with one of its inputs connected to a GMCH input pin or bi-
directional pin (used as an input pin only). The other input of each XOR gate connects to the non-
inverted output of the previous XOR gate in the chain. The first XOR gate of each chain will have one
pin internally connected tied to Vcc. The output of the last XOR gate is the chain output. Figure 14
shows the GMCH XOR chain implementation.
Figure 14. XOR Tree Implementation
Vcc
Pin 1
XOR
Out
xor.vsd
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
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