Copyright, 
nRF24LE1
RF Digital Corp.    
RF Module
 
7/26/2010 3:23 PM 
RFD21731
  
RFD21732
Patents Pending 
13715 Alton Pkwy  Irvine  CA  92618 
RFD21734
 
RFD21736
Tel: 949.610.0008  Fax: 949.610.0009 
ETSI  CE Compliant
www.rfdigital.com  sales@rfdigital.com 
RoHS 
nRF24LE1 RF Modules 
RFD21731  RFD21732  RFD21734  RFD21736 
(Also see FCC Approved part number: RFD21733) 
 
 
  
 
 
 
 
 
 w/ 32KHz Crystal 
 
 Built-in Antenna
 
 
RFD21732
 
  
 
 
RFD21731
 
 
15mm x 15mm     0.600 inch x 0.600 inch 
 
 
 w/ 32KHz Crystal 
 
 Req. Ext. Antenna 
Complete ultra-low-power wireless system-in-module. 
 
With built-in mixed signal flash microcontroller and advanced power 
 
RFD21734
management.  NO RF Designing Required.  NO parts required. 
 
 
 
Development Tools
Modular ultra low power wireless 
 
Ultra low power wireless system-on-chip solution 
The RFD21731, 
 
The RFD21731, RFD21732, RFD21734 modules are a unique solution offering a 
RFD21732, RFD21734 
 
complete ultra low power (ULP) wireless system-in-module  solution.  It integrates 
requires the user to 
 
the nRF24LE1 radio+controller which is based on the industry leading nRF24L01+ 
write their own code to 
 
2.4GHz transceiver core, an enhanced 8051 microcontroller, flash memory and a 
run on the built-in 
 wide range of analog and digital peripherals.  The 8-bit microcontroller is powerful 
internal enhanced 8051 
enough to run both the RF protocol stack and the application layer, enabling a true 
 
controller which allows 
single chip implementation of ULP wireless applications. 
 
tremendous flexibility 
 
 to the engineer to 
Optimized for ultra low power wireless 
realize their exact 
 
requirements, which 
Advanced power management and on-chip peripherals 
 
requires the purchase 
The RFD21731, RFD21732, RFD21734s internal nRF24LE1 chip is optimized to 
 
of Nordic's nRFgo 
provide a single chip solution for ULP wireless applications. The combination of 
 
Starter Kit development 
processing power, memory, low power oscillators, real-time counter, AES 
 
environment in 
encryption accelerator, random generator, plus a range of power saving modes 
 
addition to at least one 
provides an ideal platform for implementation of RF Protocols. Benefits include 
 
(preferred 2) RFD21736 
tighter protocol timing, security, lower power consumption and improved co-
 
adaptor module boards 
existence performance. For the application layer the nRF24LE1 offers a rich set of 
 for use with the nRFgo.
peripherals including: SPI, 2-wire, UART, 6 to 12-bit ADC, PWM, and an ultra low 
 
 power analog comparator for voltage level system wake-up. 
NO Dev-Tools Option: 
 
The READY-TO-USE 
 
If you do not want to do any development at all, then use RFD21733 (FCC Approved)/ 
RFD21733 / RFD21735 
 
RFD21735 which are READY-TO-USE with its built-in user application interface 
do not require any 
 
(RFDP8).  Includes RFID, Unique Electronic Serial Number, Logic Switch Transmitter 
development tools. 
 
Receiver, Serial UART 9600-8N1 and many easy-to-use addressable network modes.
 
 1 
 Copyright, 
nRF24LE1
RF Digital Corp.    
RF Module
 
7/26/2010 3:23 PM 
RFD21731
  
RFD21732
Patents Pending 
13715 Alton Pkwy  Irvine  CA  92618 
RFD21734
 
RFD21736
Tel: 949.610.0008  Fax: 949.610.0009 
ETSI  CE Compliant
www.rfdigital.com  sales@rfdigital.com 
RoHS 
 
RFD21732 Signals
RFD21732 / RFD21734 Pinout Chart (TOP VIEW) 
 
Built In Antenna
 
32 KHz Crystal 
 
 
 
+1.9 to 3.6V 
 
GND 
 
P0.0 (RFD21732 32KHz)
 
P0.1 (RFD21732 32KHz)
 
P0.2  
 
P0.3  
 
P0.4  
 P0.5  
P0.6  
 
RESET 
 
PROG 
 
 
 
 
 
 
RFD21734 Signals
 
No Internal Antenna
 
32 KHz Crystal 
 
 
 
+1.9 to 3.6V 
 
 
GND 
 
P0.0 (RFD21732 32KHz)
 
P0.1 (RFD21732 32KHz)
 
P0.2  
 
P0.3  
 
P0.4  
RFD21731 Pinout Chart (TOP VIEW) 
 P0.5  
P0.6  
 
RESET 
 
PROG 
 
External Antenna Pin 
 
 
 
 
 
RFD21731 Signals
 
Built In Antenna
 
No 32 KHz Crystal 
 
 
 
+1.9 to 3.6V 
 
GND 
 
P0.0  
 
P0.1 
 
P0.2  
P0.3  
 
P0.4  
 
P0.5  
 
P0.6  
 
RESET 
 
PROG 
 
 
 
 
 
 2