參數(shù)資料
型號: Am7969
廠商: Advanced Micro Devices, Inc.
英文描述: TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface)
中文描述: TAXIchip集成電路(透明異步Xmitter,接收器接口)
文件頁數(shù): 85/127頁
文件大小: 730K
代理商: AM7969
AMD
81
TAXIchip Integrated Circuits Technical Manual
T he Data Out Lines
When a Receiver sees the Sync symbol it sends the data byte it just received from its
Input Latch to its Decoder Latch, and then the receiver lowers its IGM. One more clock
cycle is required for the data to go to the Output Latch. At this point DSTRB is raised. In
this way all data bytes are output simultaneously from all receivers, two clock cycles
after the first Sync (or two clock cycles after a LOW CNB). The DSTRBs of all the
receivers rise simultaneously as well.
T he V LT N (V iolation) Pin
In Cascade mode the VLTN pin acts exactly like a Data Out line. The timings are exactly
the same. Violations do not change the output of the IGM pin. i.e., a Receiver that gets a
VLTN will still raise it’s IGM signal as if it received a valid data byte.
7.3 Auto-Repeat Configuration
7.3.1 Rec eiver Connec tions in Auto-Repeat Configuration
In Auto-repeat Configuration the IGM of the last Receiver on the line is inverted and tied
to the CNB of the Primary Receiver. This connection eliminates the need to send a Sync
between each Data Word.
In a 3-Receiver cascade system, IGM3 is inverted and tied to CNB1. When the IGM of
the last Receiver goes high, CNB1 goes LOW.
CNB1 going LOW ripples through the chain pulling each IGM LOW (t46 ns) until finally
the last IGM goes LOW again, pulling CNB1 HIGH resetting RX1 to receive new data.
In Figures 7-6 and 7-7, as each Receiver decodes its data byte, it raises its IGM and
thus the next Receiver’s CNB.
Figure 7-6
T AX I Rec eiver—Casc aded in Auto-Repeat
SERIN+
SERIN–
CNB
IGM
DSTRB
CSTRB
CNB
IGM
DSTRB
CSTRB
CNB
IGM
DSTRB
CSTRB
CNB
IGM
DSTRB
CSTRB
12330E-28
相關PDF資料
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Am7968-125DKC TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface)
Am7969-125DKC TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface)
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相關代理商/技術參數(shù)
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AM7969-100/B3A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Receiver
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AM7969-100DCB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Receiver
AM7969-100DE 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Receiver