参数资料
型号: EM250-RCM-R
厂商: Silicon Laboratories Inc
文件页数: 10/124页
文件大小: 0K
描述: EM250 RCM BOARD
标准包装: 12
类型: 收发器,802.15.4/Zigbee
频率: 2.4GHz
适用于相关产品: EM250
其它名称: 636-1023
EM250
2 Top-Level Functional Description
Figure 2 shows a detailed block diagram of the EM250.
TX_ACTIVE
PA select
Data
Program
RF_TX_ALT_P,N
RF_P,N
PA
PA
LNA
SYNTH
IF
DAC
ADC
MAC
+
Baseband
SRAM
5kB
XAP2b CPU
Flash
128kB
PacketTrace
Interrupt
Encryption
BIAS_R
Bias
controller
accelerator
General
OSCA
OSCB
HF OSC
Internal
purpose
timers
GPIO
registers
Always
powered
Watchdog
SIF
SIF_CLK
SIF_MISO
SIF_MOSI
RC-OSC
nSIF_LOAD
OSC32A
OSC32B
LF OSC
ADC
UART/
SPI/I2C
Chip
manager
Sleep
timer
VREG_OUT
nRESET
Regulator
POR
GPIO multiplexor swtich
GPIO[16:0]
Figure 2. EM250 Block Diagram
The radio receiver is a low-IF, super-heterodyne receiver. It utilizes differential signal paths to minimize noise
interference, and its architecture has been chosen to optimize co-existence with other devices within the
2.4GHz band (namely, IEEE 802.11g and Bluetooth). After amplification and mixing, the signal is filtered and
combined prior to being sampled by an ADC.
The digital receiver implements a coherent demodulator to generate a chip stream for the hardware-based
MAC. In addition, the digital receiver contains the analog radio calibration routines and control of the gain
within the receiver path.
The radio transmitter utilizes an efficient architecture in which the data stream directly modulates the VCO.
An integrated PA boosts the output power. The calibration of the TX path as well as the output power is
controlled by digital logic. If the EM250 is to be used with an external PA, the TX_ACTIVE signal should be used
to control the timing of the external switching logic.
The integrated 4.8 GHz VCO and loop filter minimize off-chip circuitry. Only a 24MHz crystal with its loading
capacitors is required to properly establish the PLL reference signal.
The MAC interfaces the data memory to the RX and TX baseband modules. The MAC provides hardware-based
IEEE 802.15.4 packet-level filtering. It supplies an accurate symbol time base that minimizes the
synchronization effort of the software stack and meets the protocol timing requirements. In addition, it
provides timer and synchronization assistance for the IEEE 802.15.4 CSMA-CA algorithm.
120-0082-000V Rev 1.1
Page 10
相关PDF资料
PDF描述
EK42552-02 BOARD EVAL FOR 42552 REV 02
TC25V3A32K7680 OSCILLATOR 32.7680 KHZ 1.5V SMD
7020-01040-0 TRANSFORMER CURRENT 200A
SI1000DK DEVELOPMENT KIT SI101X
7020-01038-0 TRANSFORMER CURRENT 100A
相关代理商/技术参数
参数描述
EM250-RTR 功能描述:IC ZIGBEE SYSTEM-ON-CHIP 48-QFN RoHS:是 类别:RF/IF 和 RFID >> RF 收发器 系列:EM250 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:30 系列:- 频率:4.9GHz ~ 5.9GHz 数据传输率 - 最大:54Mbps 调制或协议:* 应用:* 功率 - 输出:-3dBm 灵敏度:- 电源电压:2.7 V ~ 3.6 V 电流 - 接收:* 电流 - 传输:* 数据接口:PCB,表面贴装 存储容量:- 天线连接器:PCB,表面贴装 工作温度:-25°C ~ 85°C 封装/外壳:68-TQFN 裸露焊盘 包装:管件
EM250-STACK-R 制造商:Silicon Laboratories Inc 功能描述:EM250 BOARD STACK (RCM + BREAKOUT) - Boxed Product (Development Kits) 制造商:Silicon Laboratories Inc 功能描述:BOARD STACK EM250 RCM & BREAKOUT
EM25-12V-DC 制造商:ECLIPSE MAGNETICS 功能描述:HOLDING ELECTRO MAGNET
EM2513N/11560 制造商:ebm-papst Inc 功能描述:- Bulk
EM2524N/11560 制造商:ebm-papst Inc 功能描述:- Bulk