13 fast infrared (ir) port interface signals – AMD Geode SC3200 User Manual
Page 62
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AMD Geode™ SC3200 Processor Data Book
32581C
STB#/WRITE#
A22
O
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
Ω pull-up resistor 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 inactive (high).
TFTD17+
F_FRAME#
3.4.12
Parallel Port Interface Signals (Continued)
Signal Name
Ball No.
Type
Description
Mux
3.4.13
Fast Infrared (IR) Port Interface Signals
Signal Name
Ball No.
Type
Description
Mux
IRRX1
AK8
I
IR Receive. Primary input to receive serial data from the
IR transceiver. Monitored during power-off for wakeup
event detection.
Note:
If selected as IRRX1 function but not used, tie
IRRX1 high.
SIN3
IRRX2/GPIO38
K28
I
IR Receive 2. Auxiliary IR receiver input to support a
second transceiver. This input signal 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.
LPCPD#
IRTX
C11
O
IR Transmit. IR serial output data.
SOUT3