Note 7:
The “activate” bit for Serial Port 2 (CIrCC) is reset by VTR POR only. The VCC power-up
default for this pin is Logic “1”. Do not use this pin for infrared transceivers that are
transmit active high.
Buffer Type Descriptions
I
IS
Input, TTL compatible.
Input with Schmitt trigger.
IOD16 Input/Open Drain Output, 16mA sink.
IO24
IO4
O4
Input/Output, 24mA sink, 12mA source.
Input/Output, 4mA sink, 2mA source.
Output, 4mA sink, 2mA source.
O24
Output, 24mA sink, 12mA source.
OD24 Output, Open Drain, 24mA sink.
ICLK
IO12
O12
Clock Input
Input/Output, 12mA sink, 6mA source
Output, 12mA sink, 6mA source
OD12 Output, Open Drain, 12 mA sink
O24PD Output, 12mA sink, 6mA source with 30 mA pull-down
9
SMSC [ SMSC CORPORATION ]
