User's Manual

MaxStream 9XStream™ Wireless OEM Module Manual v2.8
45
Confidential and Proprietary, ©MaxStream, Inc. 2001
AC Characteristics
Pin Timings (SY=0) (cont.)
Symbol
Description X09-019 19200 Timing*
(B = Number of Bytes)
X09-
009
9600 Timing*
(B = Number of
Bytes)
(T measured in ms)
T
RL1
Time from when
data packet is
transmitted until
RXLED pin first
goes high on
receiver.
40.6 ms For all B,
T=39.6 ms
44.5 ms For all B,
T=44.5 ms
T
RL2
Time that RXLED
pin is driven low
(when yellow LED
flashes).
13.6 ms For 0<B<65,
T=0.79+(0.408*B)
For B>64,
T=26.9 ms
25.6 ms For 0<B<37,
T=1.63+(0.794*B)
For B>36,
T=30.2 ms
* Note: The timing formulas are approximations over a specified range of bytes. They are
accurate to within 1 – 2 milliseconds.
Pin Timings (SY = 10)
Symbol
Description X09-019 19200 Timing
Formulas*
(B = Number of Bytes)
X09-
009
9600 Timing
Formulas*
(B = Number of
Bytes)
(T measured in ms)
T
R1
Latency from the
time data is
transmitted until
received.
12.2 ms For 0<B<9,
T=9.0+(0.4*B)
For B>8,
T=12.2 ms
19.4 ms For 0<B<6,
T=15.5+(0.775*B)
For B>5 bytes,
T=19.4 ms
T
TA1
Latency from when
serial data enters
the DI pin to when
it is actually
transmitted over-
the-air.
1.6 ms For all B,
T=1.6 ms
2.0 ms For all B,
T=2.0 ms
T
TA2
Latency of over-
the-air data
transmission.
32.8 ms For all B,
T=T
P1
+ (0.4*B) +
0.8
61.7 ms For all B,
T=T
P1
+(0.8*B) +
1.6
T
P1
Time duration of
header bits in data
packet.
19.2 ms For B<9,
T=6.9 ms
For 8<B<29,
34.5 ms For B<6,
T=11.8 ms
For 5<B<22,