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| 型号： | EM250-RCM-R |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 47/124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 |
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EM250
Full I 2 C frames have to be constructed under software control by generating individual I 2 C segments. All
necessary segment transitions are shown in Figure 7. ACK or NACK generation of an I 2 C receive frame segment
is determined with the register bit SC_I2CACK in the SC1_I2CCTRL2 register.
IDLE
START Segment
STOP Segment
RECEIVE Segment
with NACK
NO
TRANSMIT Segment
received ACK ?
YES
RECEIVE Segment
with ACK
Figure 7. I2C Segment Transitions
Generation of a 7-bit address is accomplished with one transmit segment. The upper 7 bits of the transmitted
character contain the 7-bit address. The remaining lower bit contains the command type (“read” or “write”).
Generation of a 10-bit address is accomplished with two transmit segments. The upper 5 bits of the first
transmit character must be set to 0x1E . The next 2 bits are for the 2 most significant bits of the 10-bit
address. The remaining lower bit contains the command type (“read” or “write”). The second transmit
segment is for the remaining 8 bits of the 10-bit address.
Characters received and transmitted are passed through receive and transmit FIFOs. The SC1 I 2 C master
transmit and receive FIFOs are 1-byte deep. These FIFOs are accessed under software control.
(Re)start and stop segments are initiated by setting the register bits SC_I2CSTART or SC_I2CSTOP in the
SC1_I2CCTRL1 register followed by waiting until they have cleared. Alternatively, the register bit
SC_I2CCMDFIN in the SC1_I2CSTAT can be used for waiting.
To initiate a transmit segment, the data have to be written to the SC1_DATA data register, followed by setting
the register bit SC_I2CSEND in the SC1_I2CCTRL1 register, and completed by waiting until it clears.
Alternatively, the register bit SC_I2CTXFIN in the SC1_I2CSTAT can be used for waiting.
A receive segment is initiated by setting the register bit SC_I2CRECV in the SC1_I2CCTRL1 register, waiting
until it clears, and then reading from the SC1_DATA data register. Alternatively, the register bit SC_I2CRXFIN
in the SC1_I2CSTAT can be used for waiting. Now the register bit SC_I2CRXNAK in the SC1_I2CSTAT register
indicates if a NACK or ACK was received from an I 2 C slave device.
Interrupts are generated on the following events:
?
?
Bus command ( SC_I2CSTART/SC_I2CSTOP ) completed (0 to 1 transition of SC_I2CCMDFIN )
Character transmitted and slave device responded with NACK
Page 47
120-0082-000V Rev 1.1
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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 |
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