User's Manual

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M2x40 Mote Datasheet Dust Networks™ 8
6.0 Pinout
The M2x40 has two 11-pin Samtec MTMM-111-04-S-S-175-3 (or equivalent) connectors on the bottom side for handling all
of the I/O. The third pin in each of the connectors is not populated, and serves as a key for alignment. The connectors are
mounted on opposite edges of the long axis of the M2x40.
6.1 M2x40 Pinout
The M2x40 provides a bidirectional flow-controlled serial interface (serial protocol is specified in section Error! Reference
source not found.).
Table 9 M2x40 Pin Functions
Pin
Number
Pin Name Description Type Direction
1 GND Ground Power –
2 VCC Power Power –
3 KEY (no pin) – – –
4 RX UART Rx Type 2 In
5 TX UART Tx Type 2 Out
6
LED
¯¯¯¯
Active low led turn on Type 1 Out
7
MT_RTS
¯¯¯¯¯¯¯ UART active low mote ready
to send
Type 2 Out
8
MT_CTS
¯¯¯¯¯¯¯ UART active low mote clear to
send
Type 1 Out
9
SP_CTS
¯¯¯¯¯¯¯ UART active low serial
peripheral clear to send
Type 2 In
10
TIME
¯¯¯¯
Falling edge time request Type 2 In
11 Mode_pin_B
Selects between Mode 1 &
Mode 3 operation (9600bps &
115.2 kbps)
Type 2 In
12
FLASH_P_EN
¯¯¯¯¯¯¯¯¯¯¯¯
Active low flash power enable – –
13
No connection
– – –
14
No connection
– – –
15
No connection
– – –
16
No connection
– – –
17 SCK SPI clock – –
18 MOSI
SPI master out slave in serial
data
– –
19 MISO
SPI master in slave out serial
data
– –
20 KEY (no pin) – – –
21
SPI_CS
¯¯¯¯¯¯
Active low flash chip select – –
22
RST
¯¯¯
Active low reset Type 1 In
The RST
¯¯¯
input pin is internally pulled up, and connecting it is optional. When driven active low, the mote is hardware reset
until the signal is deasserted. Refer to section 7.1 for timing requirements on the RST
¯¯¯
pin. Note that the mote may also be
reset using the mote serial command (see Mote Serial API guide).
The TIME
¯¯¯¯
input pin is optional, and must either be driven or pulled up with a 5.1 MΩ
resistor. Unless noted otherwise, all
signals are active low.