Pin

Name

I/O

Description

30

/HOST_RTS

I

UART flow control input. The host sets this line low to allow data to flow from the DNT900 on the RADIO_TXD

pin. When the host sets this line high, the DNT900 will stop sending data to the host.

31

RADIO_TXD

O

UART transmitter output. The DNT900 sends serial data to the host on this pin. The sleep mode state of this

pin is configurable.

32

RADIO_RXD

I

UART receiver input. The DNT900 receives serial data from the host on this pin.

33

/HOST_CTS

O

UART/SPI flow control output. The DNT900 sets this line low to indicate it is ready to accept data from the

host on the RADIO_RXD or MOSI input. When the DNT900 sets this line high, the host must stop sending

data. The sleep mode state of this pin and /DCD is jointly configurable.

34

VMOD

O

+3.3 V regulated supply. Connect to pad 3 to support 3.3 V full scale and/or ratiometric ADC readings, etc.

Current drain on this output should be no greater than 5 mA.

35

/SS

I/O

SPI active low slave select. This pin is an output when the DNT900 operating as a master, and an input when

it is operating as a slave.

36

MOSI

I/O

SPI master out, slave in function. This pin is an output when the DNT900 is operating as a master, and is an

input when the DNT900 is operating as a slave.

37

MISO

I/O

SPI master in, slave out function. This pin is an input when the DNT900 is operating as a master, and is an

output when the DNT900 is operating as a slave.

38

SCLK

I/O

SPI clock signal. This pin is an output when operating as a master, and an input when operating as a slave.

39

/RESET

I

Active low module hardware reset.

40

RSVD

-

Reserved pin. Leave unconnected.

D

9 0 0 C O u t l i n e a n d M o u n t i n g D i m e n s i o n s

D i m e n s i o n s i n i n c h e s a n d ( m m )

2 . 0 5 0 ( 5 2 . 0 7 )

1 . 3 4 0

( 3 4 . 0 4 )

0 . 6 3 0

( 1 6 . 0 0 )

0 . 1 7 0 ( 4 . 3 2 )

0 . 0 5 0

( 1 . 2 7 )

0 . 0 4 0

( 1 . 0 2 )

0 . 1 0 0 ( 2 . 5 4 )

1

4 0

0 . 1 0 0 ( 2 . 5 4 )

Figure 2

©2010-2014 by Murata Electronics N.A., Inc.

DNT900C/P (R) 10/23/14

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