83C694D Datasheet, PDF (18/33 Pages) SMSC Corporation – Twisted-Pair Interface and Manchester Encoder/Decoder

PIN DESCRIPTION
83C694D
PIN
NUMBER
43
44
MNEMONIC SIGNAL NAME
TPR-
TPR+
Twisted-Pair
Receive
I/O
DESCRIPTION
I In 10BaseT mode, Manchester encoded data
is received via TPR+/TPR-. After timing re-
covery and decoding it is output to the con-
troller on RXD. TPR+/TPR- are connected to
the twisted-pair medium through a trans-
former and filter.
A 100Ω termination resistor is generally used
before the circuit connects to the receive sig-
nal lines, TPR+ and TPR- inputs. See Figure
2-5 for information on this design.
The 83C694D automatically corrects for a
misconnection of the + and - interface allow-
ing operation without having to correct the
wiring.
TABLE 3-1. PIN DESCRIPTION cont.
15