AMD Geode SC1200 Data Book page 64

32579B
3.4.13 Parallel Port Interface Signals (Continued)
Signal Name Ball No.
PD7 A18
PD6 A20
PD5 C19
PD4 C18
PD3 C20
PD2 D20
PD1 A21
PD0 C21
PE D17
SLCT C17
SLIN#/ASTRB# B20
STB#/WRITE# A22
3.4.14 Fast Infrared (IR) Port Interface Signals
Signal Name Ball No.
IRRX1 AK8
IRRX2/GPIO38 K28
IRTX C11
64
Type Description
I/O Parallel Port Data. Transfer data to and from the periph-
eral data bus and the appropriate Parallel Port data regis-
ter. These signals have a high current drive capability.
I Paper End. Set high by the printer when it is out of
paper.
This ball has an internal weak pull-up or pull-down resis-
tor that is programmed by software.
I Select. Set active high by the printer when the printer is
selected.
O Select Input. When low, selects the printer. This signal
is in TRI-STATE after a 0 is loaded into the corresponding
control register bit. Uses an external 4.7 KΩ pull-up resis-
tor.
Address Strobe (EPP). Active low, used in EPP mode to
denote an address or data cycle. When the cycle is
aborted, ASTRB# becomes inactive (high).
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 KΩ 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).
Type Description
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.
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.
O IR Transmit. IR serial output data.
AMD Geode™ SC1200/SC1201 Processor Data Book
Signal Definitions
Mux
TFTD13+F_AD7
TFTD1+VOPD0+
F_AD6
TFTD11+F_AD5
TFTD10+F_AD4
TFTD9+F_AD3
TFTD8+VOPD7+
F_AD2
TFTD7+VOPD6+
F_AD1
TFTD6+VOPD5+
F_AD0
TFTD14+F_C/BE2#
TFTD15+F_C/BE3#
TFTD16+
F_IRDY#
TFTD17+
F_FRAME#
Mux
SIN3
LPCPD#
SOUT3