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

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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

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