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參數(shù)資料
| 型號： | X9470 |
| 英文描述： | RF Power Amplifier (PA) Bias Controller |
| 中文描述： | 射頻功率放大器（PA）的偏置控制器 |
| 文件頁數(shù)： | 24/25頁 |
| 文件大小： | 542K |
| 代理商： | X9470 |
PeimnayInomaion
Preliminary Information
X9470
24 of 25
REV 11.16 3/20/03
www.xicor.com
Figure 15. Acknowledge Polling Sequence
It should be noted that the ninth clock cycle of the read
operation is not a “don’t care.” To terminate a read
operation, the master must either issue a stop condi-
tion during the ninth cycle or hold SDA HIGH during
the ninth clock cycle and then issue a stop condition.
Random Read
Random read operations allows the master to access
any location in the X9470. Prior to issuing the Slave
must first perform a “dummy” write operation.
The master issues the start condition and the slave
address byte, receives an acknowledge, then issues
the word address bytes. After acknowledging receipt of
each word address byte, the master immediately
issues another start condition and the slave address
byte with the R/W bit set to one. This is followed by an
acknowledge from the device and then by the eight bit
data word. The master terminates the read operation
by not responding with an acknowledge and then issu-
ing a stop condition. Refer to Figure 13 for the address,
acknowledge, and data transfer sequence.
In a similar operation called “Set Current Address,” the
device sets the address if a stop is issued instead of
the second start shown in Figure 14. The X9470 then
goes into standby mode after the stop and all bus
activity will be ignored until a start is detected. This
operation loads the new address into the address
counter. The next Current Address Read operation will
read from the newly loaded address. This operation
could be useful if the master knows the next address it
needs to read, but is not ready for the data.
ACK
returned
Issue Slave
Address Byte
(Read or Write)
Byte load completed
by issuing STOP.
Enter ACK Polling
Issue STOP
Issue START
NO
YES
Issue STOP
NO
Continue normal
Read or Write
command
sequence
PROCEED
YES
nonvolatile write
Cycle complete.
Continue command
sequence
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| X9470V24I | 功能描述:IC BIAS CTRLR RF PA 24-TSSOP RoHS:否 類別:RF/IF 和 RFID >> RF 電源控制器 IC 系列:- 標準包裝:3,000 系列:- RF 型:GSM 頻率:450MHz ~ 2GHz 特點:四頻帶 封裝/外殼:8-VFBGA 供應商設備封裝:8-MicroSMD（1.51x1.51） 包裝:帶卷 (TR) 其它名稱:LMV243BLX |
| X9483919-2 | 功能描述:環(huán)形MIL規(guī)格工具、五金與附件 RoHS:否 制造商:Amphenol Industrial MIL 類型:MIL-DTL-5015 系列:97 產品類型:Dummy Receptacles 用于:97 Series Plugs |
| X9483919-3 | 功能描述:環(huán)形MIL規(guī)格工具、五金與附件 RoHS:否 制造商:Amphenol Industrial MIL 類型:MIL-DTL-5015 系列:97 產品類型:Dummy Receptacles 用于:97 Series Plugs |
| X9483919-4 | 功能描述:環(huán)形MIL規(guī)格工具、五金與附件 RoHS:否 制造商:Amphenol Industrial MIL 類型:MIL-DTL-5015 系列:97 產品類型:Dummy Receptacles 用于:97 Series Plugs |
| X9483919-5 | 功能描述:環(huán)形MIL規(guī)格工具、五金與附件 RoHS:否 制造商:Amphenol Industrial MIL 類型:MIL-DTL-5015 系列:97 產品類型:Dummy Receptacles 用于:97 Series Plugs |
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