32579B

Signal Definitions

3.4.13Parallel Port Interface Signals (Continued)

Signal Name

Ball No.

Type

Description

Mux

 

 

 

 

 

PD7

A18

I/O

Parallel Port Data. Transfer data to and from the periph-

TFTD13+F_AD7

 

 

 

eral data bus and the appropriate Parallel Port data regis-

 

PD6

A20

 

TFTD1+VOPD0+

 

ter. These signals have a high current drive capability.

 

 

 

F_AD6

 

 

 

 

 

 

 

 

 

PD5

C19

 

 

TFTD11+F_AD5

 

 

 

 

 

PD4

C18

 

 

TFTD10+F_AD4

 

 

 

 

 

PD3

C20

 

 

TFTD9+F_AD3

 

 

 

 

 

PD2

D20

 

 

TFTD8+VOPD7+

 

 

 

 

F_AD2

 

 

 

 

 

PD1

A21

 

 

TFTD7+VOPD6+

 

 

 

 

F_AD1

 

 

 

 

 

PD0

C21

 

 

TFTD6+VOPD5+

 

 

 

 

F_AD0

 

 

 

 

 

PE

D17

I

Paper End. Set high by the printer when it is out of

TFTD14+F_C/BE2#

 

 

 

paper.

 

 

 

 

This ball has an internal weak pull-up or pull-down resis-

 

 

 

 

tor that is programmed by software.

 

 

 

 

 

 

SLCT

C17

I

Select. Set active high by the printer when the printer is

TFTD15+F_C/BE3#

 

 

 

selected.

 

 

 

 

 

 

SLIN#/ASTRB#

B20

O

Select Input. When low, selects the printer. This signal

TFTD16+

 

 

 

is in TRI-STATE after a 0 is loaded into the corresponding

F_IRDY#

 

 

 

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).

 

 

 

 

 

 

STB#/WRITE#

A22

O

Data Strobe. When low, indicates to the printer that valid

TFTD17+

 

 

 

data is available at the printer port. This signal is in TRI-

F_FRAME#

 

 

 

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).

 

 

 

 

 

 

3.4.14Fast 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

SIN3

 

 

 

IR transceiver. Monitored during power-off for wakeup

 

 

 

 

event detection.

 

 

 

 

Note: If selected as IRRX1 function but not used, tie

 

 

 

 

IRRX1 high.

 

 

 

 

 

 

IRRX2/GPIO38

K28

I

IR Receive 2. Auxiliary IR receiver input to support a

LPCPD#

 

 

 

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.

 

 

 

 

 

 

IRTX

C11

O

IR Transmit. IR serial output data.

SOUT3

 

 

 

 

 

 

 

 

 

 

64

 

 

AMD Geode™ SC1200/SC1201 Processor Data Book

Page 64
Image 64
AMD SC1200, SC1201 manual Fast Infrared IR Port Interface Signals