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XRT86SH328 Datasheet(PDF) 9 Page - Exar Corporation

Part # XRT86SH328
Description  INTEGRATED 28-CHANNEL T1/E1 LIU/FRAMER, VT/TU MAPPER AND M13 MULTIPLEXER
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT86SH328 Datasheet(HTML) 9 Page - Exar Corporation

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XRT86SH328
Datasheet
XRT86SH328 PIN DESCRIPTIONS
Datasheet
6
P1.0.1, September 1, 2005
V28
RD/
DS/
WE
I
READ Strobe/Data Strobe:
The function of this input pin depends upon which mode the Microprocessor Interface
has been configured to operate in.
Intel-Asynchronous Mode - RD* - READ Strobe Input:
If the Microprocessor Interface is operating in the Intel-Asynchronous Mode, then this
input pin will function as the RD* (Active Low Read Strobe) input signal from the
Microprocessor. Once this active-low signal is asserted, then the XRT86SH328 will
place the contents of the addressed register (or buffer location) on the Microprocessor
Interface Bi-directional data bus (D[7:0]). When this signal is negated, then the Data
Bus will be tri-stated
.Motorola-Asynchronous (68K) Mode - DS* - Data Strobe
:If the Microprocessor Interface is operating in the Motorola-Asynchronous Mode, then
this input pin will function as the DS* (Data Strobe) input signal.
Power PC 403 Mode - WE* - Write Enable Input:
If the Microprocessor Interface is operating in the Power PC 403 Mode, then this input
pin will function as the WE* (Write Enable) input pin. Anytime the Microprocessor
Interface samples this active-low input signal (along with CS* and WR/R/W*) also
being asserted (at a logic low level) upon the rising edge of µPCLK, then the
Microprocessor Interface will (upon the very same rising edge of µPCLK) latch the
contents on the Bi-Directional Data Bus (D[7:0]) into the target on-chip register or
buffer location within the XRT86SH328.
Table 2
Microprocessor Interface - Pin Descriptions
Pin/Ball
Number
Pin Name
Type
Description


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