TMC2005-JT SMSC Corporation, TMC2005-JT Datasheet - Page 22

• Manufacturer Part Number: TMC2005-JT
• Description: ARCNET 5 Port HUB Controller
• Manufacturer: SMSC Corporation

ARCNET 5 Port HUB Controller
Datasheet
Method To Connect A Crystal Clock
Connect with external parts as follows:
Note 1: When designing a printed circuit board, keep the patterns as short as possible and don’t cross with other
Note 2: When using an external clock like an oscillator module, connect it to XTLI pin and leave XTLO pin open.
nPLLTST pin
nPLLTST must be connect toVDD. The rest of input pins have pull-up resistors built in, but nPLLTST pin does not
have the pull-up resistor. Clock signal cannot ditributed into the TMC2005 if nPLLTST pin is connected GND or is left
open.
Revision 1.0 (01-30-06)
patterns.
When designing a printed circuit board, wire between XTLI pin and oscillator should be short as possible.
FIGURE 11 - CONNECTING THE CRYSTAL CLOCK
DATASHEET
Page 22
SMSC TMC2005-JT