October, 1996 6880902Z36-B
6-1
6
6 Accessory Connector
(16 Channel Models Only)
6.1 Overview
The Expanded Accessory Connector has six programmable I/O pins to allow it to adapt to various acces-
sories for the 16 channel model. For ease of programming, commonly used accessories have their pin
functions predefined and can be programmed on one data field. Some accessories will need to be pro-
grammed on a pin by pin basis. The Radio Service Software provides screens for customizing your appli-
cation pin by pin.
6.2 Customizing the Expanded Accessory Connector
The Expanded Accessory Connector's pin functions may be modified on the ACCESSORY CONNECTOR
CONFIGURATION screen. This screen is displayed when the function key F9 is pressed on the RADIO
WIDE CONFIGURATION screen. Customizing the Expanded Accessory Connector is necessary when
more than one accessory requires programmable functions or a nonstandard accessory. The screen also
contains useful information on the characteristics of each function. These are:
❏
Data Direction
Indicates whether the information is to or from the radio. OUTPUT means that the data comes
from the radio. INPUT means that the data comes from the accessory. Mismatching the Data
Direction with the accessory may result in damage to the radio or accessory or both. There-
fore, use caution when selecting functions for nonstandard accessories. The direction is deter-
mined by the selected function and is not programmable.
❏
Debounce
Determines whether the radio waits a short period of time before acting. This is done to make
sure that any mechanical switch bounce is accounted for. This parameter is programmable.
❏
Active Level
Determines whether a high voltage or low voltage means to “do something”. This parameter
is programmable.
Note: The same function (except NULL and CHANNEL STEERING) should NEVER be assigned to more
than one pin on the connector. Also ALWAYS verify the levels and polarities of the signals prior to con-
necting any custom accessory to the connector.
Each programmable pin on the Expanded Accessory Connector has a limited number of functions that
could be assigned to it. There are two type of functions: independent and dependent. Dependent func-
tions cannot be reprogrammed. They are dependent on the assigned pin when used with the selected
accessory. Independent functions can be reprogrammed to different pins.
To Next Page
Loading...
