Timing Specifications - Digi XTend User Manual

Timing specifications

The following drawing shows the timing specifications (A and B refer to the previous figure).
The following table shows the AC Characteristics (Symbols correspond with the previous two figures) ATSY Parameter
= 0)
Symbol Description
T Latency from the time data is transmitted
TX
until it is received.
T Time that TX_PWR pin (pin 4) is driven low
TL
T Time that RX LED (pin 3) is driven high
RL
T Time starting when CTS goes low until the first
CLDL
bit appears on DOUT
T Time after last bit of data until CTS goes high --
CHDH
The following table shows the DC Characteristics (Vcc = 2.8 - 5.5 VDC).
Symbol
V
OL
V
OH
XTend RF Module User Guide
Parameter Condition
Output Low Voltage V
OL
Output High Voltage V
OH
Sleep Mode 115200 Baud Rate 9600 Baud Rate
SM = 0 9.4 msec
(No sleep)
SM = 8 16 sec
SM = 7 8 sec
SM = 6 4 sec
SM = 5 2 sec
SM = 4 1 sec
-- 2.45 msec
-- 2.26 msec
-- 44 µsec
7 µsec
= 0.33V (IO = 6 mA)
= V - 0.7V (-IO = 6 mA)
SUPPLY
Timing specifications
94 msec
16 sec
8 sec
4 sec
2 sec
1 sec
29.6 msec
27.2 msec
75 µsec
7 µsec
12