参数资料
型号: EM260-BBRD-128K-USART-R
厂商: Silicon Laboratories Inc
文件页数: 22/50页
文件大小: 0K
描述: EM260 BREAKOUT 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: EM260
其它名称: 636-1026
EM260
5 SPI Protocol
The EM260 Low Level Protocol centers on the SPI interface for communication with a pair of GPIO for
handshake signaling.
The EM260 looks like a hardware peripheral.
The EM260 is the slave device and all transactions are initiated by the Host (the master).
The EM260 supports a reasonably high data rate.
5.1
Physical Interface Configuration
The EM260 supports both SPI Slave Mode 0 (clock is idle low, sample on rising edge) and SPI Slave Mode 3
(clock is idle high, sample on rising edge) at a maximum SPI clock rate of 5MHz, as illustrated in Figure 4. The
convention for the waveforms in this document is to show Mode 0.
Clock, Mode 0 (SCLK)
Clock, Mode 3 (SCLK)
Host – Master (MOSI)
EM260 – Slave (MISO)
MSB
MSB
LSB
LSB
Figure 4. SPI Transfer Format, Mode 0 and Mode 3
The nHOST_INT signal and the nWAKE signal are both active low. The Host must supply a pull-up resistor on
the nHOST_INT signal to prevent errant interruptions during undefined events such as the EM260 resetting.
The EM260 supplies an internal pull-up on the nWAKE signal to prevent errant interruptions during undefined
events such as the Host resetting.
5.2
SPI Transaction
The basic EM260 SPI transaction is half-duplex to ensure proper framing and to give the EM260 adequate
response time. The basic transaction, as shown in Figure 5, is composed of three sections: Command, Wait,
and Response. The transaction can be considered analogous to a function call. The Command section is the
function call, and the Response section is the return value.
nHOST_INT
nSSEL
MOSI
MISO
SCLK
Command
Wait
Response
Figure 5. General Timing Diagram for a SPI Transaction
120-0260-000M Rev 1.1
Page 22
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EM260-RCM-USART-R 功能描述:EM260 RCM BOARD RoHS:是 类别:RF/IF 和 RFID >> RF 评估和开发套件,板 系列:- 标准包装:1 系列:- 类型:GPS 接收器 频率:1575MHz 适用于相关产品:- 已供物品:模块 其它名称:SER3796
EM260-RTR 功能描述:IC ZIGBEE SYSTEM-ON-CHIP 40-QFN RoHS:是 类别:RF/IF 和 RFID >> RF 收发器 系列:- 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
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