Connector and Terminal Block Descriptions
Pin
J1-1
J1-2
J1-3
J1-4
J1-5
J1-6
Name
VBUS
D-
Description
This is the USB VBUS. The IM1800 and its DM1800 transceiver module can be powered from this supply.
This is the USB D- signal.
D+
This is the USB D+ signal.
GND
GND
GND
This is a signal and power supply ground for the USB connector.
This is a signal and power supply ground for the USB connector.
This is a signal and power supply ground for the USB connector.
J2-1
J3-1
J4-1
GND
VIN
This is a signal and power supply ground.
J2-2
J3-2
J4-2
This is the power supply positive input. The allowed input voltage range is 2.6 to 14 V.
J2-3
J3-3
J4-3
R1-7
R1-28
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 14 V, VOUT is regulated at 3.0 Vdc. Up to 10 mA can be supplied for powering external circuits such as
thermistor-resistor networks. External circuitry must not impress more than 10 mVp-p ripple on the regulated
output voltage.
VOUT
BIND
J2-4
J3-4
J4-4
R1-6
R1-27
This 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.
J2-5
J3-5
J4-5
R1-5
R1-26
This 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.
DIGITAL
IN
J2-6
J3-6
J4-6
R1-4
R1-25
This is connected to the input to the microcontroller’s 10-bit analog-to-digital (ADC) converter. The ADC input
range is 0 to VOUT, and the input voltage range on this pad is 0 to VOUT. Applying a voltage outside of this
range may damage the module. The reading is sent over the RF channel as a response to an RF command.
ANALOG
IN
J2-7
J3-7
J4-7
R1-3
R1-24
DIGITAL
OUT
This 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 command.
J2-8
J3-8
J4-8
R1-2
R1-23
This is connected to the module’s serial data input (USART). Data to this input is received at 9.6 kb/s, using 8
data bits, no parity, and one stop bit. The input voltage range on this pad is 0 to VOUT. Applying a voltage out-
side of this range may damage the module.
SERIAL
RX
J2-9
J3-9
J4-9
R1-1
R1-22
SERIAL
TX
This is the connected to the module’s serial data output (USART) through a 1 kilohm resistor, which provides
short-circuit protection. Data from this output is sent at 9.6 kb/s, using 8 data bits, no parity, and one stop bit.
J2-10
J3-10
J4-10
GND
This is a signal and power supply ground.
J5-1
Vpp/~MCLR
This is the programming connector microcontroller reset and programming voltage pulse input.
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RFM [ RF MONOLITHICS, INC ]
