XRT72L56 Datasheet, PDF (41/486 Pages) Exar Corporation – SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

áç
PRELIMINARY
XRT72L56
SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. P1.1.2
PIN DESCRIPTION FOR THE XRT72L56
PIN #
U23
U24
U25
U26
V1
V2
V3
V4
V23
V24
V25
V26
W1
W2
W3
W4
W23
W24
W25
W26
Y1
Y2
PIN NAME
RxOHEnable[3]/
RxHDLCDat5[3]
RxOOF[3]
NC
Rd_DS
ExtLOS[3]
TxInClk[4]
RxPOS[4]
RxLineClk[4]
RxLOS[3]
RxOH[3]/
RxHDLCDat6[3]
RxOHFrame[3]/
RxHDLCDat4[3]
RxOHClk[3]/
RxHDLCClk[3]
ExtLOS[4]
TxFrameRef[4]
TxPOS[4]
RxOutClk[4]/
RxHDLCClk[4]
RxNib2[3]/
RxHDLCDat2[3]
RxClk[3]
RxOHInd[3]
RxSer[3]/
RxIdle[3]
TxLineClk[4]
TxNEG[4]
TYPE
O
See Description for Pin A17
DESCRIPTION
O See Description for Pin B8
I
Read Data Strobe (Intel Mode):
If the microprocessor interface is operating in the Intel Mode, then this input
will function as the RD (READ STROBE) input signal from the local µP.
Once this active-low signal is asserted, then the Framer will place the con-
tents of the addressed registers (within the Framer) on the Microprocessor
Data Bus D(7:0). When this signal is negated, the Data Bus will be tri-
stated.
Data Strobe (Motorola Mode):
If the microprocessor interface is operating in the Motorola mode, then this
pin will function as the active-low Data Strobe signal.
I
See Description for Pin J3
I
See Description for Pin H3
I
See Description for Pin H2
I
See Description for Pin J4
O See Description for Pin A8
O See Description for Pin B11
O See Description for Pin A11
O See Description for Pin B10
I
See Description for Pin J3
I
See Description for Pin H1
O See Description for Pin J1
O See Description for Pin K3
O See Description for Pin A10
O See Description for Pin B9
O See Description for Pin C11
O See Description for Pin B25
O See Description for Pin J2
O See Description for Pin K4
22