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SI1002-C-GM 参数 Datasheet PDF下载

SI1002-C-GM图片预览
型号: SI1002-C-GM
PDF下载: 下载PDF文件 查看货源
内容描述: 超低功耗, 64/32 KB , 10位ADC, MCU ,集成了240-960兆赫的EZRadioPRO收发器 [Ultra Low Power, 64/32 kB, 10-Bit ADC MCU with Integrated 240-960 MHz EZRadioPRO Transceiver]
分类和应用:
文件页数/大小: 376 页 / 2369 K
品牌: SILICON [ SILICON ]
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Si1000/1/2/3/4/5  
23.6.10. Receive Header Check  
The header check is designed to support 1–4 bytes and broadcast headers. The header length needs to  
be set in register 33h, hdlen[2:0]. The headers to be checked need to be set in register 32h, hdch[3:0]. For  
instance, there can be four bytes of header in the packet structure but only one byte of the header is set to  
be checked (i.e., header 3). For the headers that are set to be checked, the expected value of the header  
should be programmed in chhd[31:0] in Registers 3F–42. The individual bits within the selected bytes to be  
checked can be enabled or disabled with the header enables, hden[31:0] in Registers 43–46. For example,  
if you want to check all bits in header 3 then hden[31:24] should be set to FF but if only the last 4 bits are  
desired to be checked then it should be set to 00001111 (0F). Broadcast headers can also be programmed  
by setting bcen[3:0] in Register 32h. For broadcast header check the value may be either “FFh” or the  
value stored in the Check Header register. A logic equivalent of the header check for Header 3 is shown in  
Figure 23.19. A similar logic check will be done for Header 2, Header 1, and Header 0 if enabled.  
Example for Header 3  
rxhd[31:24]  
BIT  
Equivalence  
comparison  
WISE  
hden[31:24]  
=
BIT  
WISE  
chhd[31:24]  
header3_ok  
bcen[3]  
Equivalence  
comparison  
FFh  
=
hdch[3]  
rxhd[31:24]  
Figure 23.19. Header  
23.6.11. TX Retransmission and Auto TX  
The transceiver is capable of automatically retransmitting the last packet loaded in the TX FIFO. Automatic  
retransmission is set by entering the TX state with the txon bit without reloading the TX FIFO. This feature  
is useful for beacon transmission or when retransmission is required due to the absence of a valid  
acknowledgement. Only packets that fit completely in the TX FIFO can be automatically retransmitted.  
An automatic transmission function is available, allowing the radio to automatically start or stop a transmis-  
sion depending on the amount of data in the TX FIFO.  
When autotx is set in “Register 08. Operating & Function Control 2", the transceiver will automatically enter  
the TX state when the TX FIFO almost full threshold is exceeded. Packets will be transmitted according to  
the configured packet length. To stop transmitting, clear the packet sent or TX FIFO almost empty inter-  
rupts must be cleared by reading register.  
268  
Rev. 1.0