DESCRIPTION OF PIN FUNCTIONS
BUFFER
PIN NO.
NAME
SYMBOL
TYPE
DESCRIPTION
83
nData Terminal
Ready
nDTR1
O4
Active low Data Terminal Ready output for
primary serial port.
Handshake output
signal notifies modem that the UART is
ready to establish data communication link.
This signal can be programmed by writing
to bit 0 of Modem Control Register (MCR).
The hardware reset will reset the nDTR
signal to inactive mode (high). Forced
inactive during loop mode operation.
FDC37C666GT (Adapter Mode): IDE
Configuration Control. During reset active
this input is read and latched to
enable/disable the IDE.
IDE
Configuration
Control
IDECF
nDTR2
I
93
nData Terminal
Ready
O4
Active low Data Terminal Ready output for
secondary serial port. Handshake output
signal notifies modem that the UART is
ready to establish data communication link.
This signal can be programmed by writing
to bit 0 of Modem Control Register (MCR),
The hardware reset will reset the nDTR
signal to inactive mode (high). Forced
inactive during loop mode operation.
FDC37C666GT (Adapter Mode): Secondary
Serial Port Configuration Control 1. During
reset active this input is read and latched to
define the address of the Secondary Serial
Port.
Secondary Serial S2CF1
Port
Configuration
Control 1
I
89
Transmit Data 2 TXD2
O4
I
Transmitter Serial Data output from
Secondary Serial Port.
FDCCF
FDC37C666GT (Adapter Mode): Floppy
Disk Configuration. This input is read and
latched during Reset to enable/disable the
Floppy Disk Controller.
11
SMSC [ SMSC CORPORATION ]
