Symbol SE 923, Integration Manual

Page: 47 / 238

4-3
Application Notes
Timing Waveforms
Explanation of the AC Symbols
Each timing symbol has five characters. The first character is always “t.” The other characters
indicate the name of the signal or the logical status of that signal. Designations are:
a WKUP*
b BPR
c Host CTS
d PWRDWN
e PWREN
f float, fall time
g trigger
h logic level high
l logic level low
pm minimum voltage level
r Host RTS
tw time duration
v Host RXD
w width
x Host TXD
Example:
tbltw = Beeper drive low time
trlcl = Time for RTS low to CTS low