Dust Networks M2020 Panduan Memulai Cepat - Halaman 10

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Halaman Cetak
C
1 - M2020 E
HAPTER
VALUATION

Serial Interface

Connector P2 provides a flow-controlled serial interface with timing information (using
TX, RX, CTS, and SOF), as described in the Mote Integration Guide, Appendix C.
Serial port settings are 9600 bps, 8 data bits, no parity, 1 stop bit.

Power Supply

The M2020-EVM board is powered by a pair of L91 1.5 V AA lithium batteries (or
equivalent), and comes with a standard double AA battery holder. The M2020-EVM
does not contain a power switch. Units are tested and shipped in deep sleep mode. To
place the device into deep sleep, short pins 1 and 6 on P2, and reset the M2020-EVM.
The status LEDs should remain off, and the device remains asleep until it is reset. To
activate the unit, press reset with pins 1 and 6 unconnected.

Absolute Maximum Ratings

Table 1-3. Absolute Maximum Ratings
c
4
M
ODULE
Parameter
Supply voltage
V
(V
)
BAT
CC
Voltage on any pin
Digital I/O current
Source
Sink
Total I/O
Storage temperature
Operating ambient
temperature
Warning: The M2020 Mote is an ESD-sensitive device. Use caution when handling
in order to prevent permanent damage to the device.
Min
Max
Units
2.7
3.6
V
–0.3
V
+0.3
V
CC
2
mA
6
mA
24
mA
–40
+85
°C
–40
+85
°C
D2120 E
VALUATION
Serial Interface
Condition
Referenced to GND
Referenced to GND
K
Q
S
G
IT
UICK
TART
UIDE