Pin Name Description
J1-1 GND This pad is a signal and power supply ground.
J1-2 VIN This is the power supply input pad. The allowed input voltage range is 2.6 to 10 V.
J1-3 VOUT
VOUT tracks 50 to 100 mV below VIN when VIN is in the range of 2.6 to 3.1 V. When VIN is in the range of 3.1
to 10 V, VOUT is regulated at 3.0 Vdc. Up to 10 mA can be supplied from this pad for powering external circuits
such as thermistor-resistor networks. External circuitry must not impress more than 10 mV
p-p
ripple on the regu
-
lated output voltage.
J1-4 BIND
This pad is connected to a logic input on the microcontroller, and is configured with a weak pull-up. When this
pin is momentarily grounded to J1-1 or J1-10, the module is placed into the bind mode, allowing this module to
be associated with other modules to form a network.
J1-5 DIGITAL IN
This pad is connected to a logic input on the microcontroller, and is configured with a weak pull-up, allowing
both logic signals and contact closures referenced to J-1 or J-10 to be read. The value of this input is sent over
the RF channel as a response to an RF command. The input voltage range on this pad is 0 to VOUT. Applying
a voltage outside of this range may damage the module.
J1-6 ANALOG IN
This pad in the input to the microcontroller’s 10-bit analog-to-digital (ADC) converter. The ADC input range is 0
to VOUT, referenced to J1-1 or J1-10. The input voltage range on this pad is 0 to VOUT. Applying a voltage
outside of this range may damage the module. The ADC reading is sent over the RF channel as a response to
an RF command.
J1-7 DIGITAL OUT
This pad is connected to a logic output on the microcontroller through a 1 kilohm resistor, which provides
short-circuit protection. The value of this output is set or read over the RF channel as a response to an RF com
-
mand.
J1-8 SERIAL RX
This pad is connected to the module’s serial data input (USART). Data to this pin is received at 9.6 kb/s (de-
fault), using 8 data bits, no parity, one stop bit. The input voltage range on this pad is 0 to VOUT. Applying a
voltage outside of this range may damage the module.
J1-9 SERIAL TX
This pad is connected to the module’s serial data output (USART) through a 1 kilohm resistor, which provides
short-circuit protection. Data from this pad is sent at 9.6 kb/s (default), using 8 data bits, no parity, one stop bit.
J1-10 GND This pad is a signal and power supply ground.
J3-1 GND This pad is a ground for the antenna port.
J3-2 ANT This pad is the antenna port.
J3-3 GND This pad is a ground for the antenna port.
J4-1 D1 This pad is the LED 1 signal.
J4-2 D2 This pad is the LED 2 signal.
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©2008 by RF Monolithics, Inc. DM1810-434MN - 4/17/08
DM1810-434MN I/O Pad Descriptions
CAUTION: Electrostatic Sensitive Device. Observe precautions when handling.
