GFSK Transceiver. BK2425 Datasheet

BK2425 Transceiver. Datasheet pdf. Equivalent

BK2425 Datasheet
Recommendation BK2425 Datasheet
Part BK2425
Description Low Power High Performance 2.4 GHz GFSK Transceiver
Feature BK2425; BK2425 Low Power High Performance 2.4 GHz GFSK Transceiver Features Pin Assignments  2400-2483..
Manufacture Beken
Datasheet
Download BK2425 Datasheet




Beken BK2425
BK2425
Low Power High Performance 2.4 GHz GFSK Transceiver
Features
Pin Assignments
2400-2483.5 MHz ISM band operation
Support 250Kbps, 1Mbps and 2 Mbps air
data rate
Programmable output power
Low power consumption
Tolerate +/- 60ppm 16 MHz crystal
Variable payload length from 1 to 32bytes
Automatic packet processing
6 data pipes for 1:6 star networks
1.9V to 3.6V power supply
4-pin SPI interface with maximum 8 MHz
clock rate
20-pin 4x4mm QFN package
Applications
NC CDVDD VDD VSS VDD
20 19 18 17 16
CE 1
CSN 2
SCK 3
MOSI 4
MISO 5
BK2425
15 VDD
14 VSS
13 RF
12 NC
11 NC
6 7 8 9 10
IRQ NC NC XO XI
Wireless PC peripherals
Wireless gamepads
Wireless audio
Remote controls
Home automation
Toys
Block Diagram
RFP
RFN
Integrated
TDD RF
Transceiver
FM
Demodulator
Power
Management
FM Modulator
Data Slicer
Gaussian
shaping
XTALP XTALN
Rx FIFO
Packet
Processing &
State Control
Tx FIFO
CSN
SCK
MOSI
MISO
IRQ
CE
Revision 1.0
Jan, 2013
Copyright © 2013
Beken Corporation
Page 1 of 30



Beken BK2425
Table of Contents
BK2425
1  General Description ................................................................................................................. 3 
2  Abbreviations .......................................................................................................................... 4 
3  Pin Information ....................................................................................................................... 5 
4  State Control ........................................................................................................................... 6 
4.1  State Control Diagram............................................................................................................... 6 
4.2  Power Down Mode.................................................................................................................... 7 
4.3  Standby-I Mode......................................................................................................................... 7 
4.4  Standby-II Mode........................................................................................................................ 7 
4.5  TX Mode ................................................................................................................................... 7 
4.6  RX Mode ................................................................................................................................... 8 
5  Packet Processing .................................................................................................................... 8 
5.1  Packet Format............................................................................................................................ 8 
5.1.1  Preamble........................................................................................................................... 9 
5.1.2  Address............................................................................................................................. 9 
5.1.3  Packet Control .................................................................................................................. 9 
5.1.4  Payload ........................................................................................................................... 10 
5.1.5  CRC................................................................................................................................ 10 
5.2  Packet Handling ...................................................................................................................... 10 
6  Data and Control Interface .................................................................................................... 11 
6.1  TX/RX FIFO ........................................................................................................................... 11 
6.2  Interrupt ................................................................................................................................... 11 
6.3  SPI Interface ............................................................................................................................ 12 
6.3.1  SPI Command ................................................................................................................ 12 
6.3.2  SPI Timing ..................................................................................................................... 13 
7  Register Map ......................................................................................................................... 15 
7.1  Register Bank 0 ....................................................................................................................... 15 
7.2  Register Bank 1 ....................................................................................................................... 21 
8  Electrical Specifications ......................................................................................................... 22 
9  Typical Application Schematic............................................................................................... 23 
10  Package and Die Bonding Information................................................................................... 24 
10.1  Package Information ........................................................................................................... 24 
10.2  Die Bonding Information.................................................................................................... 25 
10.3  PCB Bonding diagram ........................................................................................................ 27 
11  Order Information................................................................................................................. 28 
12  Contact Information .............................................................................................................. 29 
13  Update History ...................................................................................................................... 30 
Revision 1.0
Proprietary and Confidential
Page 2 of 30



Beken BK2425
1 General Description
BK2425 is a GFSK transceiver operating in
the world wide ISM frequency band at 2400-
2483.5 MHz. Burst mode transmission and up
to 2Mbps air data rate make them suitable for
applications requiring ultra low power
consumption. The embedded packet
processing engines enable their full operation
with a very simple MCU as a radio system.
Auto re-transmission and auto acknowledge
give reliable link without any MCU
interference.
BK2425 operates in TDD mode, either as a
transmitter or as a receiver.
The RF channel frequency determines the
center of the channel used by BK2425. The
frequency is set by the RF_CH register in
register bank 0 according to the following
formula: F0= 2400 + RF_CH (MHz). The
BK2425
resolution of the RF channel frequency is
1MHz.
A transmitter and a receiver must be
programmed with the same RF channel
frequency to be able to communicate with
each other.
The output power of BK2425 is set by the
RF_PWR bits in the RF_SETUP register.
Demodulation is done with embedded data
slicer and bit recovery logic. The air data rate
can be programmed to 250Kbps, 1Mbps or
2Mbps by RF_DR_HIGH and RF_DR_LOW
register. A transmitter and a receiver must be
programmed with the same setting.
In the following chapters, all registers are in
register bank 0 except with explicit claim.
RFP
RFN
Integrated
TDD RF
Transceiver
FM
Demodulator
Power
Management
FM Modulator
Data Slicer
Gaussian
shaping
Rx FIFO
Packet
Processing &
State Control
Tx FIFO
XTALP XTALN
Figure 1 BK2425 Chip Block Diagram
CSN
SCK
MOSI
MISO
IRQ
CE
Revision 1.0
Proprietary and Confidential
Page 3 of 30







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