參數(shù)資料
型號(hào)： SCANPSC110FSCX
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 微控制器/微處理器
中文描述： SPECIALTY MICROPROCESSOR CIRCUIT, PDSO28
封裝： 0.300 INCH, MS-013, SOIC-28
文件頁(yè)數(shù)： 21/25頁(yè)
文件大小： 269K
代理商： SCANPSC110FSCX
5
www.fairchildsemi.com
SCANPSC1
10F
Overview of SCANPSC110F Bridge Functions (Continued)
FIGURE 2. SCANPSC110F Bridge State Machines
The SCANPSC110F contains three distinct but coupled
state-machines (see Figure 2 ). The first of these is the
TAP-control state-machine, which is used to drive the
SCANPSC110Fs scan ports in conformance with the
1149.1 Standard (see Figure 17 of appendix). The second
is the SCANPSC110F-selection state-machine (Figure 3).
The third state-machine actually consists of three identical
but independent state-machines (see Figure 4), one per
SCANPSC110F local scan port. Each of these scan port-
selection state-machines allows individual local ports to be
inserted into and removed from the SCANPSC110Fs over-
all scan chain.
The SCANPSC110F selection state-machine performs the
address matching which gives the SCANPSC110F its
multi-drop
capability.
That
logic
supports
single-
SCANPSC110F access, multi-cast, and broadcast. The
SCANPSC110F-selection state-machine implements the
chip’s Level-1 protocol.
KEY
+ = OR
&
= AND
ADDR
= 6-bit address in the Instruction Register
SLOT
= Static address in the SCANPSC110F Selection Controller
FIGURE 3. State Machine for SCANPSC110F Bridge Selection Controller
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