dpc-64-ctl ABACOM Technologies, Inc, dpc-64-ctl Datasheet - Page 2

• Manufacturer Part Number: dpc-64-ctl
• Description: Intelligent Rf Transceiver Module
• Manufacturer: ABACOM Technologies, Inc

Detailed Pin Description
Pins 1-7
No connection.
Pin 8– CLK
This is a 16MHz external clock signal which may be
interfaced to external devices if desired. Otherwise
this pin may be left unconnected.
Pin 9– Test
This pin is internally pulled high via an internal pull-
up resistor. When taken low, typically via a tactile
feedback pushbutton switch or any other dry con-
tact, the data input pin 18 will be ignored and a 64
byte internal preset message will be output on pin
16 of the receiving DPC-64-CTL module. The con-
tent of this test message will be:
<ABACOM Technologies> DPC-64 www.abacom-tech.com
[phone]
The test message is intended for diagnostic pur-
poses and serves as a quick test to verify the integ-
rity of the RF link. With a receiving host PC running
a simple terminal program such as Hyperterminal
configured for xx00,8,N,1 the content of the test
message in a correctly configured RF wireless link
will be displayed.
Alternatively, an LED connected to the Transmit
Data Output pin 17 as shown in the test circuit will
flash when a valid test message is received.
Pin 10– Audio Output
The analog signal on pin 10 is the demodulated sig-
nal from the receiver and is made available to the
designer where it may be used for custom specific
design functions. If not required, this pin may be left
unconnected.
Pin 11– Carrier Detect
The CD pin is active low in the presence of an RF
carrier. The CD may be used as additional control
logic for external circuits. If not required, this pin
may be left unconnected.
Pin12- +5V Supply
Supply pin 12 should be decoupled to Ground via a
0.1uF ceramic capacitor.
ABACOM Technologies, Inc.
•
383 Bering Ave • Toronto • ON • M8Z 3B1 • Tel [phone] • Fax [phone]
www.abacom-tech.com
Pins 13,20,22– Supply/RF Ground
The three ground pins are internally connected
to the DPC-64-CTL ground plane. We recom-
mend connecting all three ground pins if possi-
ble. At a minimum any one of the ground pins
must be connect to system ground. Pin 22 is
preferred as an RF ground for 50 Ω coaxial ca-
ble feeding off board antenna.
Pin 14 – Send Data
The send data control line is active high. When
taken high, the data received from the transmit-
ting DPC-64-CTL will be serially output on pin
16. If held low, the data received over-the-air-will
be stored in the DPC-64-CTL’s buffer until “send
data” is taken high. The send data line functions
in association with the data ready pin 15.
Pin 15– Data Ready
When the receiving DPC-64 has received valid
data, the data ready control line may be used to
signal the receiving host that the DPC-64-CTL
has valid data ready to upload. The receiving
host then asserts a logic high level on the “send
data” line at pin 14 and the data is uploaded.
Many applications require the received data
from the DPC-64-CTL to be uploaded to the
host without supervision. These applications
therefore do not require interfacing the data
ready control line and therefore the data ready
pin 15 may be left unconnected and the send
data pin 14 then simply tied high. In this configu-
ration, the DPC-64-CTL will output the data as it
is received.
Pin 16– Data Output
The data that has been transmitted from the
DPC-64-CTL’s is checked for errors by the re-
ceiving DPC-64CTL. Error free data will be out-
put on pin 16 provided that the send data control
line pin 14 is at a logic high level.
Pin 17– Busy
The busy control line goes high when the DPC-
64-CTL transceiver module has either received
its maximum of 64 bytes or when it has detected
the end of incoming data (under conditions
when < 64 bytes have been received from the