- 您现在的位置：买卖IC网 > PDF目录21903 > 4430-T-B1 D 950 (Silicon Laboratories Inc)KIT DEV TEST EZRADIOPRO SI4430 PDF资料下载
参数资料
| 型号： | 4430-T-B1 D 950 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 41/47页 |
| 文件大小： | 799K |
| 描述： | KIT DEV TEST EZRADIOPRO SI4430 |
| 标准包装： | 1 |
| 附件类型： | 测试卡，收发器，950MHz |
| 适用于相关产品： | EZRadioPRO? |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页当前第41页第42页第43页第44页第45页第46页第47页
Si4430/31/32-B1
Rev 1.1
41
6. Data Handling and Packet Handler
The internal modem is designed to operate with a packet including a 010101... preamble structure. To configure the
modem to operate with packet formats without a preamble or other legacy packet structures contact customer
support.
6.1. RX and TX FIFOs
Two 64 byte FIFOs are integrated into the chip, one for RX and one for TX, as shown in Figure 17. "Register 7Fh.
FIFO Access" is used to access both FIFOs. A burst write, as described in "3.1. Serial Peripheral Interface (SPI)"
on page 18, to address 7Fh will write data to the TX FIFO. A burst read from address 7Fh will read data from the
RX FIFO.
Figure 17. FIFO Thresholds
The TX FIFO has two programmable thresholds. An interrupt event occurs when the data in the TX FIFO reaches
these thresholds. The first threshold is the FIFO almost full threshold, txafthr[5:0]. The value in this register
corresponds to the desired threshold value in number of bytes. When the data being filled into the TX FIFO crosses
this threshold limit, an interrupt to the microcontroller is generated so the chip can enter TX mode to transmit the
contents of the TX FIFO. The second threshold for TX is the FIFO almost empty threshold, txaethr[5:0]. When the
data being shifted out of the TX FIFO drops below the almost empty threshold an interrupt will be generated. If
more data is not loaded into the FIFO then the chip automatically exits the TX State after the ipksent interrupt
occurs. The chip will return to the mode selected by the remaining bits in SPI Register 07h. For example, the chip
may be placed into TX mode by setting the txon bit, but with the xton bit additionally set. For this condition, the chip
will transmit all of the contents of the FIFO and the ipksent interrupt will occur. When this interrupt event occurs, the
chip will clear the txon bit and return to READY mode, as indicated by the set state of the xton bit. If the pllon bit D1
is set when entering TX mode (i.e., SPI Register 07h = 0Ah), the chip will exit from TX mode after sending the
packet and return to TUNE mode.
However, the chip will not automatically return to STANDBY mode upon exit from the TX state, in the event the TX
packet is initiated by setting SPI Register 07h = 08h (i.e., setting only txon bit D3). The chip will instead return to
READY mode, with the crystal oscillator remaining enabled. This is intentional; the system may be configured such
that the host MCU derives its clock from the MCU_CLK output of the RFIC (through GPIO2), and this clock signal
must not be shut down without allowing the host MCU time to process any interrupt signals that may have
occurred. The host MCU must subsequently perform a WRITE to SPI Register 07h = 00h to enter STANDBY mode
and obtain minimum current consumption.
TX FIFO
RX FIFO
RX FIFO Almost Full
Threshold
TX FIFO Almost Empty
Threshold
TX FIFO Almost Full
Threshold
相关PDF资料 |
PDF描述 |
|---|---|
| B82432X2 | KIT INDUCTOR 1812-C SERIES |
| XPGWHT-L1-0000-00BE8 | LED WARM WHITE 2700K SMD |
| B82422X100 | KIT INDUCTOR 1210-A SERIES |
| B82422X1 | KIT INDUCTOR 1210-T SERIES |
| B82559X1 | KIT INDUCTOR POWER 82559 SERIES |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 4431 | 制造商:Thomas & Betts 功能描述:TRIPLE HEX DIE 制造商:Thomas & Betts 功能描述:Triple Hex Die |
| 4431.1001 | 功能描述:摇臂开关与扳钮开关 UV PROTECTION SWITCH Rocker, 230V 50HZ RoHS:否 制造商:C&K Components 触点形式: 开关功能: 电流额定值:50 mA 电压额定值 AC: 电压额定值 DC:30 V 功率额定值: 端接类型: 执行器:Paddle 颜色: 安装风格:Panel 端子密封: 触点电镀: 照明:Not Illuminated 照明颜色: |
| 4431.1002 | 功能描述:摇臂开关与扳钮开关 UV PROTECTION SWITCH Rocker, 115V 50HZ RoHS:否 制造商:C&K Components 触点形式: 开关功能: 电流额定值:50 mA 电压额定值 AC: 电压额定值 DC:30 V 功率额定值: 端接类型: 执行器:Paddle 颜色: 安装风格:Panel 端子密封: 触点电镀: 照明:Not Illuminated 照明颜色: |
| 4431.1003 | 功能描述:摇臂开关与扳钮开关 UV PROTECTION SWITCH Rocker, 120V 60HZ RoHS:否 制造商:C&K Components 触点形式: 开关功能: 电流额定值:50 mA 电压额定值 AC: 电压额定值 DC:30 V 功率额定值: 端接类型: 执行器:Paddle 颜色: 安装风格:Panel 端子密封: 触点电镀: 照明:Not Illuminated 照明颜色: |
| 4431.1004 | 功能描述:摇臂开关与扳钮开关 UV PROTECTION SWITCH Rocker, 230V 50HZ RoHS:否 制造商:C&K Components 触点形式: 开关功能: 电流额定值:50 mA 电压额定值 AC: 电压额定值 DC:30 V 功率额定值: 端接类型: 执行器:Paddle 颜色: 安装风格:Panel 端子密封: 触点电镀: 照明:Not Illuminated 照明颜色: |
发布紧急采购，3分钟左右您将得到回复。