Speaker; Reset Switch; Hdd Activity Led; Battery Interface - ADLINK Technology CoreModule 740 Reference Manual

Chapter 3

Speaker

The speaker signal provides sufficient signal strength to drive a 1W 8
interface at an audible level. The speaker signal is driven from an on-board amplifier and the ICH8-M.

Reset Switch

The Utility 1 header provides the signal for an external reset button, which allows the user to re-boot the
system.

HDD Activity LED

This indicator signal is fed to pin 69 of the Utility 1 connector to allow for an external LED to indicate IDE
activity.

Battery Interface

An external battery input connection is provided through the Utility 1 interface to provide an external battery
for the CMOS RAM and the RTC (Real Time Clock).

Utility 1 Pin Signals

Table 3-4 lists the signals and their descriptions for the Utility 1 interface which provides a right-angle,
80-pin connector with 0.025" (0.635mm) pin pitch.
Table 3-4. Utility 1 Interface Pin Signals (J5)
Pin # Signal
1 DCD1*
2 PP_ STRB*
3 DSR1*
4 PP_AFD*
5 RXD1
6 PD0
7 RTS1*
8 PP_ERR*
9 TXD1
10 PD1
11 CTS1*
12 PP_INIT*
13 DTR1*
14 PD2
20
Description
Serial Data Carrier Detect 1 – Indicates external serial device is detecting a
carrier signal (i.e., a communication channel is currently open). In direct connect
environments, this is driven by DTR1 as part of the DTR/DSR handshake.
Parallel Port Strobe – This is an output signal used to strobe data into the printer.
I/O pin in ECP/EPP mode.
Serial Data Set Ready 1 – Indicates external serial device is powered, initialized,
and ready. Used as hardware handshake with DTR1 for overall readiness.
Parallel Auto Feed – This is a request signal into the printer to automatically
feed one line after each line is printed.
Serial Receive Data 1– Serial port 1 receive data in.
Parallel Data 0 – This signal provides parallel data to the printer.
Serial Request To Send 1 – Indicates port is ready to transmit data. Used as
hardware handshake with CTS1 for low level flow control.
Parallel Error – This is a status output signal from the printer. A Low State
indicates an error condition on the printer.
Serial Transmit Data 1 – Serial port 1 transmit data out.
Parallel Data 1 – This signal provides parallel data to the printer.
Serial Clear To Send 1 – Indicates external serial device is ready to receive data.
Used as hardware handshake with RTS1 for low level flow control.
Parallel Initialize – This signal is used to initialize printer. Output in standard
mode, I/O in ECP/EPP mode.
Serial Data Terminal Ready 1 – Indicates port is powered, initialized, and ready.
Used as hardware handshake with DSR1 for overall readiness to communicate.
Parallel Port Data 2 – This signal provides parallel data to the printer.
Reference Manual
"Beep" speaker through the Utility
Ω
CoreModule 740
Hardware