User's Manual

Viewsonic Tweety RF Remote Rev 2.9A November 05, 2001
Universal Electronics Inc. Confidential Page 33 of 63
Key Test (Also used in Factory Test for Key):
An integrated hardware/firmware/software test unit will be designed for the Key Test. This Key
Test Unit can be used during this project software development as well as for factory test in an
actual production manufacturing. No special combination key sequence is required to get into this
Key Test mode.
The integrated Key Test unit is functionally represented as below:
TxD
------------------------------------------
→
RxD
←
------------------------------------------
+5V
---------------------------------------------
GND
---------------------------------------------
Firmware
Unit
Input
:
Manchester
code from
RF Receiver
output
Output
:
RS-232
Software
Unit
Input:
RS-232
Output:
Display on
Computer
Monitor
RS-232 interface (9600 baud)
RF
Receiver
Computer
Screen
Monitor