Computer Radiotelephone Interface; Communicationparameters; Hardwaredescription - Kenwood TRC-80 Instruction Manual

COMPUTER'" RADIOTELEPHONE
INTERFACE
The TRG-aO interfaces easily with a computer by using
the optionallF-232C Interface Unit. After you manually
switch OFF the radiotelephone power, you can then
switch ON the radiotelephone power using commands
from the computer. Similarly, after switching OFF the
power from the computer, it is then possible to switch
ON the power from the Front Panel.
COMMUNICATION PARAMETERS
In order to control the radiotelephone with your
computer, you must set the correct communication
parameters in the computer terminal application.
Configure your computer application for
9600 bps,
a
data bits, 1 stop bit, and no parity.
HARDWARE D ESCRIPTION
The TRC-aO uses a full-duplex, asynchronous, serial
interface for communicating through the female 6-PIN
DIN ACC 1 connector. Bytes are constructed with
1 start bit, a data bits, and 1 stop bit. No parity is used.
The pinout and the pin functions of the ACC 1
connector are as shown below:
ACC 1
CONNECTOR
Viewed from the
radiotelephone
Rear Panel
GND: This is the signal ground pin.
TXD: The transmit data is the serial data transferred
from the radiotelephoneto the computer. The output
uses negative logic.
RXD: The receivedata is the serial data transferred
from the computer to the radiotelephone. The input
uses negative logic.
14
CTS: This signal is supplied from the computer to the
radiotelephone. It is used to inhibit transmit data from
the radiotelephone when the computer is not ready to
receive the data. The input uses positive logic. Inhibit is
requested when the level is low.
RTS: This signal is supplied from the radiotelephone to
the computer. It is used to inhibit transmit data from the
computer when the radiotelephone is not ready to
receive the data. The output uses positive logic.
Transmit data is stopped when the level is low.
Note: Refer to the Appendix beginning on page A 1 for additional
information regarding computer control.
Pin No.
Pin
Function
I/O
Name
1
GND
Signal ground
-
2 TXD
Transmit data
Output
3 RXD
Receive data
Input
4 CTS Transmit enable
Input
5 RTS
Receive enable
Output
6 NC Not connected
-