ARCNET 5 Port HUB Controller
Datasheet
SMSC TMC2005-JT
Page 9
Revision 1.1 (07-24-07)
DATASHEET
FEATURE
NAME
INPUT/
OUTPUT
DESCRIPTION
nPLLTST
INPUT
Test pin for PLL.
Must always connect to VDD.
AVDD
Analog power supply
Using PLL: Analog power supply. There are some
limits on PCB pattern.
Using no PLL: Power supply (+5V) same as VDD1~6.
AVSS
Analog
ground
Using PLL: Analog ground. There are some limits on
PCB pattern.
Using no PLL: Use a ground same as VSS1~8.
Other Signals
FEATURES
NAME
INPUT/
OUTPUT
DESCRIPTION
CRYSTAL
INTERFACE
XTLI
INPUT
Connect a 20MHz crystal.
When supplying an external clock,
input the clock to this pin.
CRYSTAL
INTERFACE
XTLO
OUTPUT
Connect a 20MHz crystal.
When supplying an external clock, it
must be open.
SYSTEM RESET
INTERFACE
nRST
INPUT
Reset for initializing TMC2005. (active
Low)
TEST PIN
CKO
OUTPUT
Output internal clock of TMC2005.
TEST PIN
nCKOEN
INPUT
Output control of CKO.
0: Output internal clock on CKO.
1: Always output Low level on CKO.
Set “1” Normally.
TEST PIN
RXFLT
INPUT
It must be open
TEST PIN
NC [1:2]
It must be open
POWER SUPPLY
VDD [1:6]
Power supply (+5V)
GROUND VSS
[1:8]
Ground
