User's Manual

PRELIMINARY Confidential
M2x40 Mote Datasheet Dust Networks™ 6
Digital Signal Min Typ Max Units Comments
Digital current
*
Output source (single pin,
multifunction I/O configured
as output)
0.6 mA 25 °C
Output sink (single pin,
multifunction I/O configured
as output)
0.6 mA 25 °C
Input leakage current 50 nA 25 °C
*
This current level guarantees that the output voltage meets V
OH
and V
OL
specifications above.
4.0 Timing Values
Table 7 Timing Values
Variable Meaning Min Max Units
RST
¯¯¯
pulse width
Reset timing 125 µs
interbyte_timeout
The time between consecutive data bytes on the serial
port cannot exceed this time.
7 ms
interpacket_delay
The sender of an HDLC packet must wait at least this
amount of time before sending another packet.
20 ms
ack_delay
The max time delay between the MT_RTS
¯¯¯¯¯¯¯
and the
receiver’s acknowledge, SP_CTS
¯¯¯¯¯¯¯
.
1 500 ms
time_ack_timeout
The mote responds to all TIME
¯¯¯¯
pin activation requests
within this time.
100 ms
diag_ack_timeout The mote responds to all requests within this time. 125 ms
min_strobe_length The length of the strobe signal. 500 ns
boot_delay
The time between mote power up and serial interface
availability.
6250 ms
5.0 Radio
5.1 Detailed Radio Specifications
Parameter Min Typ Max Units Comments
Operating frequency 2.4000 2.4835 GHz
Number of channels 15
Channel separation 5 MHz
Occupied channel bandwidth 2.7 MHz At –20 dBc
Frequency Accuracy -50 +50 kHz
Modulation IEEE 802.15.4 DSSS
Raw data rate 250 Kbps
Receiver operating input level 0 -10 dBm
Receiver sensitivity –93 dBm
At 50% PER, V
DD
= 3 V,
25 °C
–90 dBm
At 1% PER, V
DD
= 3 V,
25 °C, (inferred by 50%
PER measurement)