XRT79L71_10 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT79L71_10' PDF : 609 Pages View PDF
REV. P2.0.0
PIN NAME
PCLK
PRELIMINARY
XRT79L71
1-CHANNEL DS3/E3 CLEAR-CHANNEL FRAMERLIU COMBO - CC/HDLC ARCHITECTURE
Table 3: List and Brief Description of the Microprocessor Interface Pins
PIN/BALL
NUMBER
TYPE
DESCRIPTION
H16
I Microprocessor Interface Clock Input:
This clock input signal is only used if the Microprocessor Interface has been con-
figured to operate in one of the Synchronous Modes (e.g., Power PC 403 Mode).
If the Microprocessor Interface is configured to operate in one of these modes,
then it will use this clock signal to do the following.
• To sample the CS, WR/R/W, A[14:0], D[7:0], RD/DS and DBEN input pins,
and
• To update the state of the D[7:0] and the RDY/DTACK output signals.
NOTES:
1. The Microprocessor Interface can work with PCLK frequencies
ranging up to 33MHz.
2. This pin is inactive if the Microprocessor interface has been configured
to operate in either the Intel-Asynchronous or the Motorola-
Asynchronous Modes. In this case, tie this pin to GND.
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