參數(shù)資料
型號: AM7968-125VBXA
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): 13/127頁
文件大?。?/td> 730K
代理商: AM7968-125VBXA
AMD
9
Am7968/Am7969
swings, which are referenced to +5.0 V. When SERIN–
is grounded, the Am7969 is put into Test Mode; SERIN+
becomes a single-ended ECL input, the PLL clock gen-
erator is bypassed, and X1
determines the bit rate
(rather than the byte rate). Both pins have internal pull
down resistors which cause unterminated inputs to
stay low.
V
CC1
, V
CC2
Power Supply
V
CC1
and V
CC2
are +5.0 volt nominal power supply pins.
V
CC1
powers TTL I/O, and V
CC2
powers internal Logic
and Analog circuitry.
VLTN
Violation (TTL Output)
The rising edge of this output indicates that a transmis-
sion error has been detected. It changes state at the
same time DOi or COi
change and will be followed by
either DSTRBor CSTRB This pin goes LOW when the
next valid byte is decoded.
X1, X2
Crystal Oscillator Inputs (Inputs)
These two crystal input pins connect to an internal paral-
lel/mode oscillator which oscillates at the fundamental
frequency external crystal. During normal operation, the
byte rate is set by the crystal frequency. Alternatively,
X1 can be driven by an external frequency source. In
multiple TAXI systems, this external source could be a
TAXI Transmitter’s CLKoutput or an external TTL fre-
quency source.
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