User's Manual

MaxStream 9XStream™ Wireless OEM Module Manual v2.8
44
Confidential and Proprietary, ©MaxStream, Inc. 2001
Appendix G – Electrical Characteristics (cont.)
AC Characteristics
Pin Timings (SY=0)
Symbol
Description X09-019 19200 Timing*
(B = Number of Bytes)
X09-
009
9600 Timing*
(B = Number of
Bytes)
(T measured in ms)
T
R1
Latency from the
time data is
transmitted until
received.
54 ms For 0<B<64,
T=41.6+(0.4*B)
For B>63,
T=66.8 ms
72.0 ms For 0<B<40,
T=46.27+(0.73*B)
For B>=39 bytes,
T=74.8 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.
52.4 ms For all B,
T=38.8 + (0.4*B) +
0.8
70 ms For all B,
T=41.8+(0.8*B) +
1.6
T
P1
Time duration of
header bits in data
packet.
31.04 ms For all B,
T=38.8 ms
41.8 ms For all B,
T=41.8 ms
T
P2
Time duration of
data bits in data
packet.
12.8 ms For all B,
T=0.4B ms
25.6 ms For all B,
T=0.8B ms
T
P3
Time duration of
CRC bits in data
packet.
0.83 ms For all B,
T=0.8 ms
1.6 ms For all B,
T=1.6 ms
T
TL1
Time from when
data packet is
transmitted until
TX/PWR first
pulses low.
46.4 ms For 0<B<12,
T=37.8 ms
For 11<B<65,
T=33.3+(0.39*B) ms
For B>64,
T=58.4 ms
55.6 ms For 0<B<12,
T=39.8 ms
For 11<B<35,
T=30.52+(0.77*B)
For B>34 bytes,
T=56.8 ms
T
TL2
Time that
TX/PWR pin is
driven low (when
red LED flashes).
8.4 ms For 0<B<14,
T=3.24+(0.4B)
For B>13,
T=8.48 ms
16.8 ms For 0<B<14,
T=6.5+(0.8*B) ms
For B>13,
T=16.8 ms