KeyAT-5 Keyboard Port Adapter
11/14/2011
4
L3 Systems
KeyAT-5 USB Connector
The following connector shows the pin definitions
for the KeyAT-5 USB connector. Note that this
provides power to the KeyAT-5 Adapter.
Gnd
Pin 4
Data+
Pin 3
Data-
Pin 2
+5V
Pin 1
USB Series A Connector
Sending Data
The main job of the KeyAT-5 is to transfer data from
the RS-232 port and send it through to the
computer's keyboard port. Data can be sent using
ASCII, ASCII control codes, HID keyboard scan
codes or ASCII hex. A line can have a maximum
length of 80 characters and should end with an
<ENTER> (CR, hex 0D). When using immediate
mode, data and commands are interpreted as
received with buffering up to 80 characters. If you
get more than 80 characters ahead of the
computer, the additional characters will be ignored.