SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 72

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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Signal Definitions
2.4.12 Parallel Port Interface Signals (Continued)
2.4.13 Fast Infrared (IR) Port Interface Signals
Signal Name
STB#/WRITE#
Signal Name
IRRX1
IRRX2/GPIO38
IRTX
EBGA
EBGA
AB1
AJ9
J28
J3
(Continued)
Ball No.
Ball No.
TEPBGA
TEPBGA
AK8
C11
A22
K28
Type
Type
O
O
I
I
Description
Data Strobe. When low, indicates to the
printer that valid data is available at the
printer port. This signal is in TRI-STATE after
a 0 is loaded into the corresponding control
register bit. An external 4.7 K pull-up resis-
tor should be employed.
Write Strobe. Active low, used in EPP mode
to denote an address or data cycle. When
the cycle is aborted, WRITE# becomes inac-
tive (high).
Description
IR Receive. Primary input to receive serial
data from the IR transceiver. Monitored dur-
ing power-off for wakeup event detection.
Note: If selected as IRRX1 function but not
IR Receive 2. Auxiliary IR receiver input to
support a second transceiver. This input sig-
nal can be used when GPIO38 is selected
using PMR[14], and when AUX_IRRX bit in
register IRCR2 of the IR module in internal
SuperI/O is set.
IR Transmit. IR serial output data.
72
used, tie IRRX1 high.
F_FRAME#
TFTD17+
LPCPD#
SOUT3
SIN3
Mux
Mux
Revision 3.0