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參數(shù)資料
| 型號： | T5743 |
| 廠商： | Atmel Corp. |
| 英文描述： | UHF ASK/FSK Receiver |
| 中文描述： | 超高頻ASK / FSK接收器 |
| 文件頁數(shù)： | 18/41頁 |
| 文件大?。?/td> | 681K |
| 代理商： | T5743 |
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18
T5743
4569A–RKE–12/02
Figure 21.
Activating the Receiving Mode via Pin POLLING/_ON
Figure 20 illustrates how to set the receiver back to polling mode via Pin POLLING/_ON.
The Pin POLLING/_ON must be held to low for the time period t
on2
. After the positive
edge on Pin POLLING/_ON and the delay t
on3
, the polling mode is active and the sleep
time T
Sleep
elapses.
This command is faster than using Pin DATA at the cost of an additional connection to
the microcontroller.
Figure 21 illustrates how to set the receiver to receiving mode via the Pin POLL-
ING/_ON. The Pin POLLING/_ON must be held to Low. After the delay t
on1
, the receiver
changes from sleep mode to start-up mode regardless the programmed values for T
Sleep
and N
Bit-check
. As long as POLLING/_ON is held to Low, the values for T
Sleep
and N
Bit-
check
will be ignored, but not deleted (see also section “Digital Noise Suppression”).
If the receiver is polled exclusively by a microcontroller, T
Sleep
must be programmed to
31 (permanent sleep mode). In this case the receiver remains in sleep mode as long as
POLLING/_ON is held to High.
Data Clock
The Pin DATA_CLK makes a data shift clock available to sample the data stream into a
shift register. Using this data clock, a microcontroller can easily synchronize the data
stream. This clock can only be used for Manchester and Bi-phase coded signals.
Generation of the data clock:
After a successful bit check, the receiver switches from polling mode to receiving mode
and the data stream is available at Pin DATA. In receiving mode, the data clock control
logic (Manchester/Bi-phase demodulator) is active and examines the incoming data
stream. This is done, like in the bit check, by subsequent time frame checks where the
distance between two edges is continuously compared to a programmable time window.
As illustrated in Figure 22, only two distances between two edges in Manchester and Bi-
phase coded signals are valid (T and 2T).
The limits for T are the same as used for the bit check. They can be programmed in the
LIMIT-register (Lim_min and Lim_max, see Table 11 and
Table 12).
The limits for 2T are calculated as follows:
Lower limit of 2T: Lim_min_2T =
(Lim_min + Lim_max) - (Lim_max - Lim_min)/2
Upper limit of 2T: Lim_max_2T=
(Lim_min + Lim_max) + (Lim_max - Lim_min)/2
(If the result for “Lim_min_2T” or “Lim_max_2T” is not an integer value, it will be round
up.)
POLLING/_ON
Data_out (DATA)
Serial bi-directional
data line
Sleep mode
Receiving mode
X
X
t
on1
Start-up mode
IC_ACTIVE
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| T5743P3 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:UHF ASK/FSK Receiver |
| T5743P3-TG | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:UHF ASK/FSK Receiver |
| T5743P3-TGQ | 功能描述:IC RCVR ASK/FSK 300MHZ 20-SOIC RoHS:否 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 09/Jan/2012 標準包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數(shù)據(jù)傳輸率 - 最大:- 調(diào)制或協(xié)議:- 應(yīng)用:* 電流 - 接收:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| T5743P3-TGS | 功能描述:IC RCVR ASK/FSK 300MHZ 20-SOIC RoHS:否 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 09/Jan/2012 標準包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數(shù)據(jù)傳輸率 - 最大:- 調(diào)制或協(xié)議:- 應(yīng)用:* 電流 - 接收:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| T5743P6-TG | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:UHF ASK/FSK Receiver |
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